feat: add wasi target

.gitignore

@@ -8,3 +8,5 @@ lib
 !lib/*/temporal_capi.lib
 
 tmp
+
+test/test262/polyfill-injected.js

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "test/temporal-test262-runner"]
+	path = test/temporal-test262-runner
+	url = https://github.com/js-temporal/temporal-test262-runner.git

build.zig

@@ -4,7 +4,7 @@ const build_crab = @import("build_crab");
 pub fn build(b: *std.Build) !void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
-    const is_wasm_freestanding = target.result.cpu.arch.isWasm();
+    const is_wasm_freestanding = target.result.cpu.arch.isWasm() and target.result.os.tag == .freestanding;
 
     // --- Zig Module: temporalz --- //
     const mod = b.addModule("temporalz", .{
@@ -108,20 +108,31 @@ pub fn build(b: *std.Build) !void {
             },
         }),
     });
+    exe.root_module.link_libc = !is_wasm_freestanding;
+    exe.rdynamic = is_wasm_freestanding;
     b.installArtifact(exe);
 
     // --- Steps: Run --- //
     {
         const run_step = b.step("run", "Run the app");
-        if (is_wasm_freestanding) {
+        switch (target.result.os.tag) {
+            .freestanding => {
                 const run_cmd = b.addSystemCommand(&.{ "node", "example/src/main.mjs" });
                 run_cmd.step.dependOn(b.getInstallStep());
                 run_step.dependOn(&run_cmd.step);
-        } else {
+            },
+            .wasi => {
+                const run_cmd = b.addSystemCommand(&.{"wasmtime"});
+                run_cmd.addFileArg(exe.getEmittedBin());
+                run_cmd.step.dependOn(b.getInstallStep());
+                run_step.dependOn(&run_cmd.step);
+            },
+            else => {
                 const run_cmd = b.addRunArtifact(exe);
                 run_cmd.step.dependOn(b.getInstallStep());
                 if (b.args) |args| run_cmd.addArgs(args);
                 run_step.dependOn(&run_cmd.step);
+            },
         }
     }
 
@@ -159,22 +170,10 @@ pub fn build(b: *std.Build) !void {
     // --- Steps: test-262 --- //
     {
         const test262_step = b.step("test262", "Run test-262 tests");
-        const test262_tests = b.addTest(.{
+        const run_cmd = b.addSystemCommand(&.{ "node", "test/test262/runner.mjs" });
-            .root_module = b.createModule(.{
+        if (b.args) |args| run_cmd.addArgs(args);
-                .root_source_file = b.path("test/test262/root.zig"),
+        run_cmd.step.dependOn(b.getInstallStep());
-                .target = target,
+        test262_step.dependOn(&run_cmd.step);
-                .optimize = optimize,
-                .imports = &.{
-                    .{ .name = "temporalz", .module = mod },
-                },
-            }),
-            .test_runner = .{
-                .path = b.path("test/runner.zig"),
-                .mode = .simple,
-            },
-        });
-        test262_tests.root_module.link_libc = !is_wasm_freestanding;
-        test262_step.dependOn(&b.addRunArtifact(test262_tests).step);
     }
 
     // --- Steps: Build all platforms --- //

example/src/wasm.zig

@@ -1,11 +1,837 @@
 const std = @import("std");
 const program = @import("root.zig");
+const Temporal = @import("temporalz");
 
 export fn _start() void {
     const allocator = std.heap.wasm_allocator;
     program.run(allocator, null) catch {};
 }
 
+const wasm_allocator = std.heap.wasm_allocator;
+const PolyfillError = error{InvalidHandle};
+
+var instants_init = false;
+var durations_init = false;
+var instants: std.ArrayList(?Temporal.Instant) = .empty;
+var durations: std.ArrayList(?Temporal.Duration) = .empty;
+var plain_dates_init = false;
+var plain_dates: std.ArrayList(?Temporal.PlainDate) = .empty;
+
+var last_error: ?[]u8 = null;
+
+fn ensureInstants() void {
+    if (!instants_init) {
+        instants = .empty;
+        instants_init = true;
+    }
+}
+
+fn ensureDurations() void {
+    if (!durations_init) {
+        durations = .empty;
+        durations_init = true;
+    }
+}
+
+fn ensurePlainDates() void {
+    if (!plain_dates_init) {
+        plain_dates = .empty;
+        plain_dates_init = true;
+    }
+}
+
+fn addInstant(inst: Temporal.Instant) u32 {
+    ensureInstants();
+    instants.append(wasm_allocator, inst) catch return 0;
+    return @intCast(instants.items.len);
+}
+
+fn getInstant(handle: u32) !Temporal.Instant {
+    ensureInstants();
+    if (handle == 0 or handle > instants.items.len) return PolyfillError.InvalidHandle;
+    return instants.items[handle - 1] orelse PolyfillError.InvalidHandle;
+}
+
+fn removeInstant(handle: u32) void {
+    if (!instants_init or handle == 0 or handle > instants.items.len) return;
+    if (instants.items[handle - 1]) |inst| {
+        inst.deinit();
+        instants.items[handle - 1] = null;
+    }
+}
+
+fn addDuration(dur: Temporal.Duration) u32 {
+    ensureDurations();
+    durations.append(wasm_allocator, dur) catch return 0;
+    return @intCast(durations.items.len);
+}
+
+fn getDuration(handle: u32) !Temporal.Duration {
+    ensureDurations();
+    if (handle == 0 or handle > durations.items.len) return PolyfillError.InvalidHandle;
+    return durations.items[handle - 1] orelse PolyfillError.InvalidHandle;
+}
+
+fn removeDuration(handle: u32) void {
+    if (!durations_init or handle == 0 or handle > durations.items.len) return;
+    if (durations.items[handle - 1]) |dur| {
+        dur.deinit();
+        durations.items[handle - 1] = null;
+    }
+}
+
+fn addPlainDate(date: Temporal.PlainDate) u32 {
+    ensurePlainDates();
+    plain_dates.append(wasm_allocator, date) catch return 0;
+    return @intCast(plain_dates.items.len);
+}
+
+fn getPlainDate(handle: u32) !Temporal.PlainDate {
+    ensurePlainDates();
+    if (handle == 0 or handle > plain_dates.items.len) return PolyfillError.InvalidHandle;
+    return plain_dates.items[handle - 1] orelse PolyfillError.InvalidHandle;
+}
+
+fn removePlainDate(handle: u32) void {
+    if (!plain_dates_init or handle == 0 or handle > plain_dates.items.len) return;
+    if (plain_dates.items[handle - 1]) |date| {
+        date.deinit();
+        plain_dates.items[handle - 1] = null;
+    }
+}
+
+fn clearLastError() void {
+    if (last_error) |msg| {
+        wasm_allocator.free(msg);
+        last_error = null;
+    }
+}
+
+fn setLastError(err: anyerror) void {
+    clearLastError();
+    const msg = std.fmt.allocPrint(wasm_allocator, "{s}", .{@errorName(err)}) catch return;
+    last_error = msg;
+}
+
+fn setLastErrorMessage(msg: []const u8) void {
+    clearLastError();
+    const owned = wasm_allocator.alloc(u8, msg.len) catch return;
+    std.mem.copyForwards(u8, owned, msg);
+    last_error = owned;
+}
+
+fn packPtrLen(ptr: [*]u8, len: usize) u64 {
+    const ptr_u32: u32 = @intCast(@intFromPtr(ptr));
+    const len_u32: u32 = @intCast(len);
+    return (@as(u64, ptr_u32) << 32) | @as(u64, len_u32);
+}
+
+fn unpackI128Hi(value: i128) i64 {
+    const bits: u128 = @bitCast(value);
+    const hi_bits: u64 = @intCast(bits >> 64);
+    return @bitCast(hi_bits);
+}
+
+fn unpackI128Lo(value: i128) u64 {
+    const bits: u128 = @bitCast(value);
+    return @intCast(bits & 0xFFFFFFFFFFFFFFFF);
+}
+
+fn joinI128(hi: i64, lo: u64) i128 {
+    const hi_bits: u64 = @bitCast(hi);
+    const value: u128 = (@as(u128, hi_bits) << 64) | @as(u128, lo);
+    return @bitCast(value);
+}
+
+fn unitFromCode(code: u8) ?Temporal.Duration.Unit {
+    return switch (code) {
+        1 => .nanosecond,
+        2 => .microsecond,
+        3 => .millisecond,
+        4 => .second,
+        5 => .minute,
+        6 => .hour,
+        7 => .day,
+        8 => .week,
+        9 => .month,
+        10 => .year,
+        11 => .auto,
+        else => null,
+    };
+}
+
+fn roundingModeFromCode(code: u8) ?Temporal.Duration.RoundingMode {
+    return switch (code) {
+        1 => .ceil,
+        2 => .floor,
+        3 => .expand,
+        4 => .trunc,
+        5 => .half_ceil,
+        6 => .half_floor,
+        7 => .half_expand,
+        8 => .half_trunc,
+        9 => .half_even,
+        else => null,
+    };
+}
+
+export fn temporalz_last_error_ptr() usize {
+    return if (last_error) |msg| @intFromPtr(msg.ptr) else 0;
+}
+
+export fn temporalz_last_error_len() usize {
+    return if (last_error) |msg| msg.len else 0;
+}
+
+export fn temporalz_last_error_clear() void {
+    clearLastError();
+}
+
+export fn temporalz_alloc(len: usize) usize {
+    clearLastError();
+    const buf = wasm_allocator.alloc(u8, len) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return @intFromPtr(buf.ptr);
+}
+
+export fn temporalz_free(ptr: usize, len: usize) void {
+    if (ptr == 0 or len == 0) return;
+    const slice = @as([*]u8, @ptrFromInt(ptr))[0..len];
+    wasm_allocator.free(slice);
+}
+
+export fn temporalz_string_free(ptr: usize, len: usize) void {
+    temporalz_free(ptr, len);
+}
+
+export fn temporalz_instant_from_utf8(ptr: [*]const u8, len: usize) u32 {
+    clearLastError();
+    const text = ptr[0..len];
+    const inst = Temporal.Instant.from(text) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addInstant(inst);
+}
+
+export fn temporalz_instant_from_epoch_milliseconds(epoch_ms: i64) u32 {
+    clearLastError();
+    const inst = Temporal.Instant.fromEpochMilliseconds(epoch_ms) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addInstant(inst);
+}
+
+export fn temporalz_instant_from_epoch_nanoseconds_parts(hi: i64, lo: u64) u32 {
+    clearLastError();
+    const epoch_ns = joinI128(hi, lo);
+    const inst = Temporal.Instant.fromEpochNanoseconds(epoch_ns) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addInstant(inst);
+}
+
+export fn temporalz_instant_epoch_milliseconds(handle: u32) i64 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return inst.epochMilliseconds();
+}
+
+export fn temporalz_instant_epoch_nanoseconds_hi(handle: u32) i64 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return unpackI128Hi(inst.epochNanoseconds());
+}
+
+export fn temporalz_instant_epoch_nanoseconds_lo(handle: u32) u64 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return unpackI128Lo(inst.epochNanoseconds());
+}
+
+export fn temporalz_instant_to_string(handle: u32) u64 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const text = inst.toString(wasm_allocator, .{}) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return packPtrLen(text.ptr, text.len);
+}
+
+export fn temporalz_instant_add(handle: u32, duration_handle: u32) u32 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    var dur = getDuration(duration_handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const res = inst.add(&dur) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addInstant(res);
+}
+
+export fn temporalz_instant_subtract(handle: u32, duration_handle: u32) u32 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    var dur = getDuration(duration_handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const res = inst.subtract(&dur) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addInstant(res);
+}
+
+export fn temporalz_instant_compare(handle_a: u32, handle_b: u32) i32 {
+    clearLastError();
+    const a = getInstant(handle_a) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const b = getInstant(handle_b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return @intCast(Temporal.Instant.compare(a, b));
+}
+
+export fn temporalz_instant_equals(handle_a: u32, handle_b: u32) u8 {
+    clearLastError();
+    const a = getInstant(handle_a) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const b = getInstant(handle_b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return if (Temporal.Instant.equals(a, b)) 1 else 0;
+}
+
+export fn temporalz_instant_round(
+    handle: u32,
+    smallest_unit: u8,
+    rounding_mode: u8,
+    rounding_increment: u32,
+) u32 {
+    clearLastError();
+    const inst = getInstant(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+
+    var opts = Temporal.Instant.RoundingOptions{};
+    if (smallest_unit != 255) {
+        opts.smallest_unit = unitFromCode(smallest_unit) orelse {
+            setLastErrorMessage("Invalid smallestUnit");
+            return 0;
+        };
+    }
+    if (rounding_mode != 255) {
+        opts.rounding_mode = roundingModeFromCode(rounding_mode) orelse {
+            setLastErrorMessage("Invalid roundingMode");
+            return 0;
+        };
+    }
+    if (rounding_increment != 0) {
+        opts.rounding_increment = rounding_increment;
+    }
+
+    const res = inst.round(opts) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addInstant(res);
+}
+
+export fn temporalz_instant_destroy(handle: u32) void {
+    removeInstant(handle);
+}
+
+export fn temporalz_duration_from_utf8(ptr: [*]const u8, len: usize) u32 {
+    clearLastError();
+    const text = ptr[0..len];
+    const dur = Temporal.Duration.from(text) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(dur);
+}
+
+export fn temporalz_duration_from_parts(
+    mask: u32,
+    years: i64,
+    months: i64,
+    weeks: i64,
+    days: i64,
+    hours: i64,
+    minutes: i64,
+    seconds: i64,
+    milliseconds: i64,
+    microseconds: f64,
+    nanoseconds: f64,
+) u32 {
+    clearLastError();
+    var partial = Temporal.Duration.PartialDuration{};
+    if ((mask & 0x1) != 0) partial.years = years;
+    if ((mask & 0x2) != 0) partial.months = months;
+    if ((mask & 0x4) != 0) partial.weeks = weeks;
+    if ((mask & 0x8) != 0) partial.days = days;
+    if ((mask & 0x10) != 0) partial.hours = hours;
+    if ((mask & 0x20) != 0) partial.minutes = minutes;
+    if ((mask & 0x40) != 0) partial.seconds = seconds;
+    if ((mask & 0x80) != 0) partial.milliseconds = milliseconds;
+    if ((mask & 0x100) != 0) partial.microseconds = microseconds;
+    if ((mask & 0x200) != 0) partial.nanoseconds = nanoseconds;
+
+    const dur = Temporal.Duration.from(partial) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(dur);
+}
+
+export fn temporalz_duration_init(
+    years: i64,
+    months: i64,
+    weeks: i64,
+    days: i64,
+    hours: i64,
+    minutes: i64,
+    seconds: i64,
+    milliseconds: i64,
+    microseconds: f64,
+    nanoseconds: f64,
+) u32 {
+    clearLastError();
+    const dur = Temporal.Duration.init(
+        years,
+        months,
+        weeks,
+        days,
+        hours,
+        minutes,
+        seconds,
+        milliseconds,
+        microseconds,
+        nanoseconds,
+    ) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(dur);
+}
+
+export fn temporalz_duration_to_string(handle: u32) u64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const text = dur.toString(wasm_allocator, .{}) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return packPtrLen(text.ptr, text.len);
+}
+
+export fn temporalz_duration_years(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.years();
+}
+
+export fn temporalz_duration_months(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.months();
+}
+
+export fn temporalz_duration_weeks(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.weeks();
+}
+
+export fn temporalz_duration_days(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.days();
+}
+
+export fn temporalz_duration_hours(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.hours();
+}
+
+export fn temporalz_duration_minutes(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.minutes();
+}
+
+export fn temporalz_duration_seconds(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.seconds();
+}
+
+export fn temporalz_duration_milliseconds(handle: u32) i64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.milliseconds();
+}
+
+export fn temporalz_duration_microseconds(handle: u32) f64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.microseconds();
+}
+
+export fn temporalz_duration_nanoseconds(handle: u32) f64 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.nanoseconds();
+}
+
+export fn temporalz_duration_sign(handle: u32) i32 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return switch (dur.sign()) {
+        .positive => 1,
+        .zero => 0,
+        .negative => -1,
+    };
+}
+
+export fn temporalz_duration_blank(handle: u32) u8 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return if (dur.blank()) 1 else 0;
+}
+
+export fn temporalz_duration_abs(handle: u32) u32 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(dur.abs());
+}
+
+export fn temporalz_duration_negated(handle: u32) u32 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(dur.negated());
+}
+
+export fn temporalz_duration_add(handle_a: u32, handle_b: u32) u32 {
+    clearLastError();
+    const a = getDuration(handle_a) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const b = getDuration(handle_b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const res = a.add(b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(res);
+}
+
+export fn temporalz_duration_subtract(handle_a: u32, handle_b: u32) u32 {
+    clearLastError();
+    const a = getDuration(handle_a) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const b = getDuration(handle_b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const res = a.subtract(b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(res);
+}
+
+export fn temporalz_duration_compare(handle_a: u32, handle_b: u32) i32 {
+    clearLastError();
+    const a = getDuration(handle_a) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const b = getDuration(handle_b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const res = a.compare(b, .{}) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return @intCast(res);
+}
+
+export fn temporalz_duration_total(handle: u32, unit_code: u8) f64 {
+    clearLastError();
+    const unit = unitFromCode(unit_code) orelse {
+        setLastErrorMessage("Invalid unit");
+        return 0;
+    };
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.total(.{ .unit = unit }) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+}
+
+export fn temporalz_duration_round(
+    handle: u32,
+    smallest_unit: u8,
+    largest_unit: u8,
+    rounding_mode: u8,
+    rounding_increment: u32,
+) u32 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+
+    var opts = Temporal.Duration.RoundingOptions{};
+    if (smallest_unit != 255) {
+        opts.smallest_unit = unitFromCode(smallest_unit) orelse {
+            setLastErrorMessage("Invalid smallestUnit");
+            return 0;
+        };
+    }
+    if (largest_unit != 255) {
+        opts.largest_unit = unitFromCode(largest_unit) orelse {
+            setLastErrorMessage("Invalid largestUnit");
+            return 0;
+        };
+    }
+    if (rounding_mode != 255) {
+        opts.rounding_mode = roundingModeFromCode(rounding_mode) orelse {
+            setLastErrorMessage("Invalid roundingMode");
+            return 0;
+        };
+    }
+    if (rounding_increment != 0) {
+        opts.rounding_increment = rounding_increment;
+    }
+
+    const res = dur.round(opts) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(res);
+}
+
+export fn temporalz_duration_compare_plain_date(handle_a: u32, handle_b: u32, date_handle: u32) i32 {
+    clearLastError();
+    const a = getDuration(handle_a) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const b = getDuration(handle_b) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const date = getPlainDate(date_handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const res = a.compare(b, .{ .relative_to = .{ .plain_date = date } }) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return @intCast(res);
+}
+
+export fn temporalz_duration_total_plain_date(handle: u32, unit_code: u8, date_handle: u32) f64 {
+    clearLastError();
+    const unit = unitFromCode(unit_code) orelse {
+        setLastErrorMessage("Invalid unit");
+        return 0;
+    };
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const date = getPlainDate(date_handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return dur.total(.{ .unit = unit, .relative_to = .{ .plain_date = date } }) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+}
+
+export fn temporalz_duration_round_plain_date(
+    handle: u32,
+    smallest_unit: u8,
+    largest_unit: u8,
+    rounding_mode: u8,
+    rounding_increment: u32,
+    date_handle: u32,
+) u32 {
+    clearLastError();
+    const dur = getDuration(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const date = getPlainDate(date_handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+
+    var opts = Temporal.Duration.RoundingOptions{};
+    if (smallest_unit != 255) {
+        opts.smallest_unit = unitFromCode(smallest_unit) orelse {
+            setLastErrorMessage("Invalid smallestUnit");
+            return 0;
+        };
+    }
+    if (largest_unit != 255) {
+        opts.largest_unit = unitFromCode(largest_unit) orelse {
+            setLastErrorMessage("Invalid largestUnit");
+            return 0;
+        };
+    }
+    if (rounding_mode != 255) {
+        opts.rounding_mode = roundingModeFromCode(rounding_mode) orelse {
+            setLastErrorMessage("Invalid roundingMode");
+            return 0;
+        };
+    }
+    if (rounding_increment != 0) {
+        opts.rounding_increment = rounding_increment;
+    }
+    opts.relative_to = .{ .plain_date = date };
+
+    const res = dur.round(opts) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addDuration(res);
+}
+
+export fn temporalz_plain_date_from_utf8(ptr: [*]const u8, len: usize) u32 {
+    clearLastError();
+    const text = ptr[0..len];
+    const date = Temporal.PlainDate.from(text) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addPlainDate(date);
+}
+
+export fn temporalz_plain_date_init(year: i32, month: u8, day: u8) u32 {
+    clearLastError();
+    const date = Temporal.PlainDate.init(year, month, day) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return addPlainDate(date);
+}
+
+export fn temporalz_plain_date_to_string(handle: u32) u64 {
+    clearLastError();
+    const date = getPlainDate(handle) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    const text = date.toString(wasm_allocator, .{}) catch |err| {
+        setLastError(err);
+        return 0;
+    };
+    return packPtrLen(text.ptr, text.len);
+}
+
+export fn temporalz_plain_date_destroy(handle: u32) void {
+    removePlainDate(handle);
+}
+
+export fn temporalz_duration_destroy(handle: u32) void {
+    removeDuration(handle);
+}
+
 extern fn console(ptr: [*]u8, len: u32) void;
 
 fn logFn(comptime _: anytype, comptime _: anytype, comptime format: []const u8, args: anytype) void {

test/test262/duration.zig

@@ -1,824 +0,0 @@
-const std = @import("std");
-const Temporal = @import("temporalz");
-
-// Mirrors test262 test/built-ins/Temporal/Duration/basic.js (constructor fields and sign)
-test "Temporal.Duration constructor components" {
-    const pos = try Temporal.Duration.init(5, 5, 5, 5, 5, 5, 5, 5, 5, 0);
-    defer pos.deinit();
-    try std.testing.expectEqual(@as(i64, 5), pos.years());
-    try std.testing.expectEqual(@as(i64, 5), pos.months());
-    try std.testing.expectEqual(@as(i64, 5), pos.weeks());
-    try std.testing.expectEqual(@as(i64, 5), pos.days());
-    try std.testing.expectEqual(@as(i64, 5), pos.hours());
-    try std.testing.expectEqual(@as(i64, 5), pos.minutes());
-    try std.testing.expectEqual(@as(i64, 5), pos.seconds());
-    try std.testing.expectEqual(@as(i64, 5), pos.milliseconds());
-    try std.testing.expectEqual(@as(f64, 5), pos.microseconds());
-    try std.testing.expectEqual(@as(f64, 0), pos.nanoseconds());
-    try std.testing.expectEqual(Temporal.Duration.Sign.positive, pos.sign());
-
-    const neg = try Temporal.Duration.init(-5, -5, -5, -5, -5, -5, -5, -5, -5, 0);
-    defer neg.deinit();
-    try std.testing.expectEqual(@as(i64, -5), neg.years());
-    try std.testing.expectEqual(@as(i64, -5), neg.months());
-    try std.testing.expectEqual(@as(i64, -5), neg.weeks());
-    try std.testing.expectEqual(@as(i64, -5), neg.days());
-    try std.testing.expectEqual(@as(i64, -5), neg.hours());
-    try std.testing.expectEqual(@as(i64, -5), neg.minutes());
-    try std.testing.expectEqual(@as(i64, -5), neg.seconds());
-    try std.testing.expectEqual(@as(i64, -5), neg.milliseconds());
-    try std.testing.expectEqual(@as(f64, -5), neg.microseconds());
-    try std.testing.expectEqual(@as(f64, 0), neg.nanoseconds());
-    try std.testing.expectEqual(Temporal.Duration.Sign.negative, neg.sign());
-
-    const neg_zero = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0.0, 0.0);
-    defer neg_zero.deinit();
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.years());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.months());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.weeks());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.days());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.hours());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.minutes());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.seconds());
-    try std.testing.expectEqual(@as(i64, 0), neg_zero.milliseconds());
-    try std.testing.expectEqual(@as(f64, 0), neg_zero.microseconds());
-    try std.testing.expectEqual(@as(f64, 0), neg_zero.nanoseconds());
-    try std.testing.expectEqual(Temporal.Duration.Sign.zero, neg_zero.sign());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/compare/basic.js
-test "Temporal.Duration compare time-only" {
-    const td1 = try Temporal.Duration.init(0, 0, 0, 0, 5, 5, 5, 5, 5, 5);
-    defer td1.deinit();
-    const td2 = try Temporal.Duration.init(0, 0, 0, 0, 5, 4, 5, 5, 5, 5);
-    defer td2.deinit();
-    const td1_neg = try Temporal.Duration.init(0, 0, 0, 0, -5, -5, -5, -5, -5, -5);
-    defer td1_neg.deinit();
-    const td2_neg = try Temporal.Duration.init(0, 0, 0, 0, -5, -4, -5, -5, -5, -5);
-    defer td2_neg.deinit();
-
-    try std.testing.expectEqual(@as(i8, 0), try td1.compare(td1, .{}));
-    try std.testing.expectEqual(@as(i8, -1), try td2.compare(td1, .{}));
-    try std.testing.expectEqual(@as(i8, 1), try td1.compare(td2, .{}));
-    try std.testing.expectEqual(@as(i8, 0), try td1_neg.compare(td1_neg, .{}));
-    try std.testing.expectEqual(@as(i8, 1), try td2_neg.compare(td1_neg, .{}));
-    try std.testing.expectEqual(@as(i8, -1), try td1_neg.compare(td2_neg, .{}));
-    try std.testing.expectEqual(@as(i8, -1), try td1_neg.compare(td2, .{}));
-    try std.testing.expectEqual(@as(i8, 1), try td1.compare(td2_neg, .{}));
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/from/argument-string.js
-test "Temporal.Duration from string parsing" {
-    // P1D
-    const d1 = try Temporal.Duration.from("P1D");
-    defer d1.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d1.years());
-    try std.testing.expectEqual(@as(i64, 0), d1.months());
-    try std.testing.expectEqual(@as(i64, 0), d1.weeks());
-    try std.testing.expectEqual(@as(i64, 1), d1.days());
-    try std.testing.expectEqual(@as(i64, 0), d1.hours());
-    try std.testing.expectEqual(@as(i64, 0), d1.minutes());
-    try std.testing.expectEqual(@as(i64, 0), d1.seconds());
-    try std.testing.expectEqual(@as(i64, 0), d1.milliseconds());
-
-    // p1y1m1dt1h1m1s
-    const d2 = try Temporal.Duration.from("p1y1m1dt1h1m1s");
-    defer d2.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d2.years());
-    try std.testing.expectEqual(@as(i64, 1), d2.months());
-    try std.testing.expectEqual(@as(i64, 0), d2.weeks());
-    try std.testing.expectEqual(@as(i64, 1), d2.days());
-    try std.testing.expectEqual(@as(i64, 1), d2.hours());
-    try std.testing.expectEqual(@as(i64, 1), d2.minutes());
-    try std.testing.expectEqual(@as(i64, 1), d2.seconds());
-
-    // P1Y1M1W1DT1H1M1.123456789S
-    const d3 = try Temporal.Duration.from("P1Y1M1W1DT1H1M1.123456789S");
-    defer d3.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d3.years());
-    try std.testing.expectEqual(@as(i64, 1), d3.months());
-    try std.testing.expectEqual(@as(i64, 1), d3.weeks());
-    try std.testing.expectEqual(@as(i64, 1), d3.days());
-    try std.testing.expectEqual(@as(i64, 1), d3.hours());
-    try std.testing.expectEqual(@as(i64, 1), d3.minutes());
-    try std.testing.expectEqual(@as(i64, 1), d3.seconds());
-    try std.testing.expectEqual(@as(i64, 123), d3.milliseconds());
-    try std.testing.expectEqual(@as(f64, 456), d3.microseconds());
-    try std.testing.expectEqual(@as(f64, 789), d3.nanoseconds());
-
-    // P1DT0.5M (0.5 minutes)
-    const d4 = try Temporal.Duration.from("P1DT0.5M");
-    defer d4.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d4.years());
-    try std.testing.expectEqual(@as(i64, 0), d4.months());
-    try std.testing.expectEqual(@as(i64, 0), d4.weeks());
-    try std.testing.expectEqual(@as(i64, 1), d4.days());
-    try std.testing.expectEqual(@as(i64, 0), d4.hours());
-    try std.testing.expectEqual(@as(i64, 0), d4.minutes());
-    try std.testing.expectEqual(@as(i64, 30), d4.seconds());
-
-    // -P1Y1M1W1DT1H1M1.123456789S (negative)
-    const d5 = try Temporal.Duration.from("-P1Y1M1W1DT1H1M1.123456789S");
-    defer d5.deinit();
-    try std.testing.expectEqual(@as(i64, -1), d5.years());
-    try std.testing.expectEqual(@as(i64, -1), d5.months());
-    try std.testing.expectEqual(@as(i64, -1), d5.weeks());
-    try std.testing.expectEqual(@as(i64, -1), d5.days());
-    try std.testing.expectEqual(@as(i64, -1), d5.hours());
-    try std.testing.expectEqual(@as(i64, -1), d5.minutes());
-    try std.testing.expectEqual(@as(i64, -1), d5.seconds());
-
-    // PT100M
-    const d6 = try Temporal.Duration.from("PT100M");
-    defer d6.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d6.years());
-    try std.testing.expectEqual(@as(i64, 0), d6.months());
-    try std.testing.expectEqual(@as(i64, 0), d6.weeks());
-    try std.testing.expectEqual(@as(i64, 0), d6.days());
-    try std.testing.expectEqual(@as(i64, 0), d6.hours());
-    try std.testing.expectEqual(@as(i64, 100), d6.minutes());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/abs/basic.js
-test "Temporal.Duration abs" {
-    // blank duration
-    const d1 = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d1.deinit();
-    const abs1 = d1.abs();
-    defer abs1.deinit();
-    try std.testing.expectEqual(@as(i64, 0), abs1.years());
-    try std.testing.expectEqual(@as(i64, 0), abs1.months());
-    try std.testing.expectEqual(@as(i64, 0), abs1.weeks());
-    try std.testing.expectEqual(@as(i64, 0), abs1.days());
-
-    // positive values
-    const d2 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-    defer d2.deinit();
-    const abs2 = d2.abs();
-    defer abs2.deinit();
-    try std.testing.expectEqual(@as(i64, 1), abs2.years());
-    try std.testing.expectEqual(@as(i64, 2), abs2.months());
-    try std.testing.expectEqual(@as(i64, 3), abs2.weeks());
-    try std.testing.expectEqual(@as(i64, 4), abs2.days());
-    try std.testing.expectEqual(@as(i64, 5), abs2.hours());
-    try std.testing.expectEqual(@as(i64, 6), abs2.minutes());
-    try std.testing.expectEqual(@as(i64, 7), abs2.seconds());
-    try std.testing.expectEqual(@as(i64, 8), abs2.milliseconds());
-    try std.testing.expectEqual(@as(f64, 9), abs2.microseconds());
-    try std.testing.expectEqual(@as(f64, 10), abs2.nanoseconds());
-
-    // negative values
-    const d3 = try Temporal.Duration.init(-1, -2, -3, -4, -5, -6, -7, -8, -9, -10);
-    defer d3.deinit();
-    const abs3 = d3.abs();
-    defer abs3.deinit();
-    try std.testing.expectEqual(@as(i64, 1), abs3.years());
-    try std.testing.expectEqual(@as(i64, 2), abs3.months());
-    try std.testing.expectEqual(@as(i64, 3), abs3.weeks());
-    try std.testing.expectEqual(@as(i64, 4), abs3.days());
-    try std.testing.expectEqual(@as(i64, 5), abs3.hours());
-    try std.testing.expectEqual(@as(i64, 6), abs3.minutes());
-    try std.testing.expectEqual(@as(i64, 7), abs3.seconds());
-    try std.testing.expectEqual(@as(i64, 8), abs3.milliseconds());
-    try std.testing.expectEqual(@as(f64, 9), abs3.microseconds());
-    try std.testing.expectEqual(@as(f64, 10), abs3.nanoseconds());
-
-    // some zeros
-    const d4 = try Temporal.Duration.init(1, 0, 3, 0, 5, 0, 7, 0, 9, 0);
-    defer d4.deinit();
-    const abs4 = d4.abs();
-    defer abs4.deinit();
-    try std.testing.expectEqual(@as(i64, 1), abs4.years());
-    try std.testing.expectEqual(@as(i64, 0), abs4.months());
-    try std.testing.expectEqual(@as(i64, 3), abs4.weeks());
-    try std.testing.expectEqual(@as(i64, 0), abs4.days());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/negated/basic.js
-test "Temporal.Duration negated" {
-    // blank duration
-    const d1 = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d1.deinit();
-    const neg1 = d1.negated();
-    defer neg1.deinit();
-    try std.testing.expectEqual(@as(i64, 0), neg1.years());
-    try std.testing.expectEqual(Temporal.Duration.Sign.zero, neg1.sign());
-
-    // positive values
-    const d2 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-    defer d2.deinit();
-    const neg2 = d2.negated();
-    defer neg2.deinit();
-    try std.testing.expectEqual(@as(i64, -1), neg2.years());
-    try std.testing.expectEqual(@as(i64, -2), neg2.months());
-    try std.testing.expectEqual(@as(i64, -3), neg2.weeks());
-    try std.testing.expectEqual(@as(i64, -4), neg2.days());
-    try std.testing.expectEqual(@as(i64, -5), neg2.hours());
-    try std.testing.expectEqual(@as(i64, -6), neg2.minutes());
-    try std.testing.expectEqual(@as(i64, -7), neg2.seconds());
-    try std.testing.expectEqual(@as(i64, -8), neg2.milliseconds());
-    try std.testing.expectEqual(@as(f64, -9), neg2.microseconds());
-    try std.testing.expectEqual(@as(f64, -10), neg2.nanoseconds());
-    try std.testing.expectEqual(Temporal.Duration.Sign.negative, neg2.sign());
-
-    // negative values
-    const d3 = try Temporal.Duration.init(-1, -2, -3, -4, -5, -6, -7, -8, -9, -10);
-    defer d3.deinit();
-    const neg3 = d3.negated();
-    defer neg3.deinit();
-    try std.testing.expectEqual(@as(i64, 1), neg3.years());
-    try std.testing.expectEqual(@as(i64, 2), neg3.months());
-    try std.testing.expectEqual(@as(i64, 3), neg3.weeks());
-    try std.testing.expectEqual(@as(i64, 4), neg3.days());
-    try std.testing.expectEqual(Temporal.Duration.Sign.positive, neg3.sign());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/add/basic.js
-test "Temporal.Duration add time-only" {
-    // Simple time additions
-    const td1 = try Temporal.Duration.init(0, 0, 0, 0, 1, 2, 3, 4, 5, 6);
-    defer td1.deinit();
-    const td2 = try Temporal.Duration.init(0, 0, 0, 0, 1, 2, 3, 4, 5, 6);
-    defer td2.deinit();
-    const result = try td1.add(td2);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 0), result.years());
-    try std.testing.expectEqual(@as(i64, 0), result.months());
-    try std.testing.expectEqual(@as(i64, 0), result.weeks());
-    try std.testing.expectEqual(@as(i64, 0), result.days());
-    try std.testing.expectEqual(@as(i64, 2), result.hours());
-    try std.testing.expectEqual(@as(i64, 4), result.minutes());
-    try std.testing.expectEqual(@as(i64, 6), result.seconds());
-    try std.testing.expectEqual(@as(i64, 8), result.milliseconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/subtract/basic.js
-test "Temporal.Duration subtract time-only" {
-    // Simple time subtraction
-    const td1 = try Temporal.Duration.init(0, 0, 0, 0, 5, 5, 5, 5, 5, 5);
-    defer td1.deinit();
-    const td2 = try Temporal.Duration.init(0, 0, 0, 0, 1, 1, 1, 1, 1, 1);
-    defer td2.deinit();
-    const result = try td1.subtract(td2);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 4), result.hours());
-    try std.testing.expectEqual(@as(i64, 4), result.minutes());
-    try std.testing.expectEqual(@as(i64, 4), result.seconds());
-    try std.testing.expectEqual(@as(i64, 4), result.milliseconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/blank/basic.js
-test "Temporal.Duration blank" {
-    // Blank duration
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-    try std.testing.expectEqual(true, blank.blank());
-
-    // Non-blank durations
-    const d1 = try Temporal.Duration.init(1, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d1.deinit();
-    try std.testing.expectEqual(false, d1.blank());
-
-    const d2 = try Temporal.Duration.init(0, 1, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d2.deinit();
-    try std.testing.expectEqual(false, d2.blank());
-
-    const d3 = try Temporal.Duration.init(0, 0, 1, 0, 0, 0, 0, 0, 0, 0);
-    defer d3.deinit();
-    try std.testing.expectEqual(false, d3.blank());
-
-    const d4 = try Temporal.Duration.init(0, 0, 0, 1, 0, 0, 0, 0, 0, 0);
-    defer d4.deinit();
-    try std.testing.expectEqual(false, d4.blank());
-
-    const d5 = try Temporal.Duration.init(0, 0, 0, 0, 1, 0, 0, 0, 0, 0);
-    defer d5.deinit();
-    try std.testing.expectEqual(false, d5.blank());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/toString/basic.js
-test "Temporal.Duration toString" {
-    const allocator = std.testing.allocator;
-
-    // Blank duration
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-    const str1 = try blank.toString(allocator, .{});
-    defer allocator.free(str1);
-    try std.testing.expectEqualSlices(u8, "PT0S", str1);
-
-    // Hours and minutes
-    const td1 = try Temporal.Duration.init(0, 0, 0, 0, 1, 30, 0, 0, 0, 0);
-    defer td1.deinit();
-    const str2 = try td1.toString(allocator, .{});
-    defer allocator.free(str2);
-    try std.testing.expectEqualSlices(u8, "PT1H30M", str2);
-
-    // Full duration
-    const td2 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-    defer td2.deinit();
-    const str3 = try td2.toString(allocator, .{});
-    defer allocator.free(str3);
-    // Result should contain Y, M, W, D, H, M, S, etc.
-    try std.testing.expect(std.mem.containsAtLeast(u8, str3, 1, "Y"));
-    try std.testing.expect(std.mem.containsAtLeast(u8, str3, 1, "W"));
-    try std.testing.expect(std.mem.containsAtLeast(u8, str3, 1, "D"));
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/toJSON/basic.js
-test "Temporal.Duration toJSON" {
-    const allocator = std.testing.allocator;
-
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-    const json = try blank.toJSON(allocator);
-    defer allocator.free(json);
-    try std.testing.expectEqualSlices(u8, "PT0S", json);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/total/basic.js
-test "Temporal.Duration total" {
-    const td = try Temporal.Duration.init(0, 0, 0, 0, 1, 30, 0, 0, 0, 0);
-    defer td.deinit();
-
-    // total hours
-    const hours = try td.total(.{ .unit = Temporal.Duration.Unit.hour });
-    try std.testing.expectApproxEqAbs(@as(f64, 1.5), hours, 0.0001);
-
-    // total minutes
-    const minutes = try td.total(.{ .unit = Temporal.Duration.Unit.minute });
-    try std.testing.expectApproxEqAbs(@as(f64, 90), minutes, 0.0001);
-
-    // total seconds
-    const seconds = try td.total(.{ .unit = Temporal.Duration.Unit.second });
-    try std.testing.expectApproxEqAbs(@as(f64, 5400), seconds, 0.0001);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/constructor.js
-test "Temporal.Duration cannot be called without new" {
-    // Note: In Zig we use a function, not a constructor, so this test is about ensuring proper init
-    // Testing that we can successfully create a duration
-    const dur = try Temporal.Duration.init(1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
-    defer dur.deinit();
-    try std.testing.expectEqual(@as(i64, 1), dur.years());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/days-undefined.js
-test "Temporal.Duration with specific fields from ISO string" {
-    const d1 = try Temporal.Duration.from("P1Y");
-    defer d1.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d1.years());
-    try std.testing.expectEqual(@as(i64, 0), d1.months());
-    try std.testing.expectEqual(@as(i64, 0), d1.days());
-    try std.testing.expectEqual(@as(i64, 0), d1.hours());
-
-    const d2 = try Temporal.Duration.from("PT1H");
-    defer d2.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d2.years());
-    try std.testing.expectEqual(@as(i64, 0), d2.days());
-    try std.testing.expectEqual(@as(i64, 1), d2.hours());
-    try std.testing.expectEqual(@as(i64, 0), d2.minutes());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/mixed.js
-test "Temporal.Duration mixed components" {
-    const d1 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-    defer d1.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d1.years());
-    try std.testing.expectEqual(@as(i64, 2), d1.months());
-    try std.testing.expectEqual(@as(i64, 3), d1.weeks());
-    try std.testing.expectEqual(@as(i64, 4), d1.days());
-    try std.testing.expectEqual(@as(i64, 5), d1.hours());
-    try std.testing.expectEqual(@as(i64, 6), d1.minutes());
-    try std.testing.expectEqual(@as(i64, 7), d1.seconds());
-    try std.testing.expectEqual(@as(i64, 8), d1.milliseconds());
-    try std.testing.expectEqual(@as(f64, 9), d1.microseconds());
-    try std.testing.expectEqual(@as(f64, 10), d1.nanoseconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/sign/basic.js
-test "Temporal.Duration sign property" {
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-    try std.testing.expectEqual(Temporal.Duration.Sign.zero, blank.sign());
-
-    const pos = try Temporal.Duration.init(1, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer pos.deinit();
-    try std.testing.expectEqual(Temporal.Duration.Sign.positive, pos.sign());
-
-    const neg = try Temporal.Duration.init(-1, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer neg.deinit();
-    try std.testing.expectEqual(Temporal.Duration.Sign.negative, neg.sign());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/large-number.js
-test "Temporal.Duration with large numbers" {
-    const d = try Temporal.Duration.init(100000, 100000, 100000, 100000, 100000, 100000, 100000, 100000, 100000, 100000);
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 100000), d.years());
-    try std.testing.expectEqual(@as(i64, 100000), d.months());
-    try std.testing.expectEqual(@as(i64, 100000), d.weeks());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/from/blank-duration.js
-test "Temporal.Duration blank from string" {
-    const blank1 = try Temporal.Duration.from("PT0S");
-    defer blank1.deinit();
-    try std.testing.expectEqual(true, blank1.blank());
-
-    const blank2 = try Temporal.Duration.from("P0D");
-    defer blank2.deinit();
-    try std.testing.expectEqual(true, blank2.blank());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/length.js
-test "Temporal.Duration constructor has correct arity" {
-    // In Zig, we test that init can be called with the expected parameters
-    const d = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-    defer d.deinit();
-    try std.testing.expect(true); // If we get here, init works
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/from/length.js
-test "Temporal.Duration from has correct arity" {
-    const d = try Temporal.Duration.from("P1D");
-    defer d.deinit();
-    try std.testing.expect(true); // If we get here, from works
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/add/basic.js with normal values
-test "Temporal.Duration add with time fields" {
-    const d1 = try Temporal.Duration.init(0, 0, 0, 0, 1, 1, 1, 1, 0, 0);
-    defer d1.deinit();
-    const d2 = try Temporal.Duration.init(0, 0, 0, 0, 2, 2, 2, 2, 0, 0);
-    defer d2.deinit();
-
-    const result = try d1.add(d2);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 0), result.years());
-    try std.testing.expectEqual(@as(i64, 3), result.hours());
-    try std.testing.expectEqual(@as(i64, 3), result.minutes());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/add/basic.js with date and time
-test "Temporal.Duration add with date and time components" {
-    // Note: Adding durations with date components together requires a RelativeTo context
-    // which is not always available, causing a RangeError
-    if (true) return error.SkipZigTest;
-
-    const d1 = try Temporal.Duration.init(100, 100, 100, 100, 100, 100, 100, 100, 100, 100);
-    defer d1.deinit();
-    const d2 = try Temporal.Duration.init(100, 100, 100, 100, 100, 100, 100, 100, 100, 100);
-    defer d2.deinit();
-
-    const result = try d1.add(d2);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 200), result.years());
-    try std.testing.expectEqual(@as(i64, 200), result.months());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/subtract/basic.js with normal values
-test "Temporal.Duration subtract with time fields" {
-    const d1 = try Temporal.Duration.init(0, 0, 0, 0, 5, 5, 5, 5, 0, 0);
-    defer d1.deinit();
-    const d2 = try Temporal.Duration.init(0, 0, 0, 0, 2, 2, 2, 2, 0, 0);
-    defer d2.deinit();
-
-    const result = try d1.subtract(d2);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 0), result.years());
-    try std.testing.expectEqual(@as(i64, 3), result.hours());
-    try std.testing.expectEqual(@as(i64, 3), result.minutes());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/subtract/basic.js with date and time
-test "Temporal.Duration subtract with date and time components" {
-    // Note: Subtracting durations with date components together requires a RelativeTo context
-    // which is not always available, causing a RangeError
-    if (true) return error.SkipZigTest;
-
-    const d1 = try Temporal.Duration.init(200, 200, 200, 200, 200, 200, 200, 200, 200, 200);
-    defer d1.deinit();
-    const d2 = try Temporal.Duration.init(100, 100, 100, 100, 100, 100, 100, 100, 100, 100);
-    defer d2.deinit();
-
-    const result = try d1.subtract(d2);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 100), result.years());
-    try std.testing.expectEqual(@as(i64, 100), result.months());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/name.js
-test "Temporal.Duration constructor name" {
-    // In Zig we can't directly test function name, but we test that the constructor exists and works
-    const d = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d.deinit();
-    try std.testing.expect(true);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/from/argument-duration.js
-test "Temporal.Duration from duration object" {
-    const d1 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
-    defer d1.deinit();
-
-    // In Zig binding, we'd typically test string parsing instead
-    const d2 = try Temporal.Duration.from("P1Y2M3W4DT5H6M7.008009010S");
-    defer d2.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d2.years());
-    try std.testing.expectEqual(@as(i64, 2), d2.months());
-    try std.testing.expectEqual(@as(i64, 3), d2.weeks());
-    try std.testing.expectEqual(@as(i64, 4), d2.days());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/with/basic.js (approximation)
-test "Temporal.Duration with method basic" {
-    // Skip - requires with() method which may not be available
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/with/all-positive.js
-test "Temporal.Duration with positive components" {
-    // Skip - requires with() method
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/round/basic.js
-test "Temporal.Duration round method" {
-    // Skip - requires round() method with RoundingOptions
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/round/largest-unit.js
-test "Temporal.Duration round with largest unit" {
-    // Skip - requires round() method
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/round/smallest-unit.js
-test "Temporal.Duration round with smallest unit" {
-    // Skip - requires round() method
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/years-undefined.js
-test "Temporal.Duration years property undefined behavior" {
-    const d = try Temporal.Duration.from("PT1H");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.years());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/months-undefined.js
-test "Temporal.Duration months property undefined behavior" {
-    const d = try Temporal.Duration.from("PT1H");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.months());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/weeks-undefined.js
-test "Temporal.Duration weeks property undefined behavior" {
-    const d = try Temporal.Duration.from("PT1H");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.weeks());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/days-undefined.js (property access)
-test "Temporal.Duration days property undefined behavior" {
-    const d = try Temporal.Duration.from("PT1H");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.days());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/hours-undefined.js
-test "Temporal.Duration hours property undefined behavior" {
-    const d = try Temporal.Duration.from("P1Y");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.hours());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/minutes-undefined.js
-test "Temporal.Duration minutes property undefined behavior" {
-    const d = try Temporal.Duration.from("P1Y");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.minutes());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/seconds-undefined.js
-test "Temporal.Duration seconds property undefined behavior" {
-    const d = try Temporal.Duration.from("P1Y");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.seconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/milliseconds-undefined.js
-test "Temporal.Duration milliseconds property undefined behavior" {
-    const d = try Temporal.Duration.from("P1Y");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 0), d.milliseconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/microseconds-undefined.js
-test "Temporal.Duration microseconds property undefined behavior" {
-    const d = try Temporal.Duration.from("P1Y");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(f64, 0), d.microseconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/nanoseconds-undefined.js
-test "Temporal.Duration nanoseconds property undefined behavior" {
-    const d = try Temporal.Duration.from("P1Y");
-    defer d.deinit();
-    try std.testing.expectEqual(@as(f64, 0), d.nanoseconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/max.js
-test "Temporal.Duration max value handling" {
-    // Test that very large durations can be created
-    const d = try Temporal.Duration.init(999999999, 999999999, 999999999, 999999999, 999999999, 999999999, 999999999, 999999999, 999999999, 999999999);
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 999999999), d.years());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/lower-limit.js
-test "Temporal.Duration lower limit handling" {
-    // Test negative duration handling
-    const d = try Temporal.Duration.init(-999999999, -999999999, -999999999, -999999999, -999999999, -999999999, -999999999, -999999999, -999999999, -999999999);
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, -999999999), d.years());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/out-of-range.js
-test "Temporal.Duration out of range behavior" {
-    // Skip - would require error handling for invalid ranges
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/invalid-type.js
-test "Temporal.Duration invalid type handling" {
-    // Skip - type validation would be at binding level
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/fractional-throws-rangeerror.js
-test "Temporal.Duration fractional range error" {
-    // Skip - fractional components validation
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/infinity-throws-rangeerror.js
-test "Temporal.Duration infinity range error" {
-    // Skip - infinity handling at binding level
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/negative-infinity-throws-rangeerror.js
-test "Temporal.Duration negative infinity range error" {
-    // Skip - infinity handling at binding level
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/builtin.js
-test "Temporal.Duration builtin verification" {
-    const d = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d.deinit();
-    try std.testing.expect(true);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/call-builtin.js
-test "Temporal.Duration call as builtin" {
-    // In Zig, Duration is created via init function, not called as builtin
-    const d = try Temporal.Duration.init(1, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer d.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d.years());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/valueOf/basic.js
-test "Temporal.Duration valueOf method" {
-    // Skip - valueOf may not be directly comparable in Zig
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/compare/blank-duration.js
-test "Temporal.Duration compare blank durations" {
-    const blank1 = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank1.deinit();
-    const blank2 = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank2.deinit();
-
-    const result = try blank1.compare(blank2, .{});
-    try std.testing.expectEqual(@as(i8, 0), result);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/from/blank-duration.js (property test)
-test "Temporal.Duration blank property from string" {
-    const d = try Temporal.Duration.from("PT0S");
-    defer d.deinit();
-    try std.testing.expectEqual(true, d.blank());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/abs/new-object.js
-test "Temporal.Duration abs creates new object" {
-    const d1 = try Temporal.Duration.init(-5, -5, -5, -5, -5, -5, -5, -5, -5, -5);
-    defer d1.deinit();
-    const d2 = d1.abs();
-    defer d2.deinit();
-
-    // Verify they have different signs
-    try std.testing.expectEqual(Temporal.Duration.Sign.negative, d1.sign());
-    try std.testing.expectEqual(Temporal.Duration.Sign.positive, d2.sign());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/negated/basic.js (zero handling)
-test "Temporal.Duration negated zero duration" {
-    const zero = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer zero.deinit();
-    const negated = zero.negated();
-    defer negated.deinit();
-
-    try std.testing.expectEqual(Temporal.Duration.Sign.zero, negated.sign());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/from/string-with-skipped-units.js
-test "Temporal.Duration from string with skipped units" {
-    const d1 = try Temporal.Duration.from("P1Y3M");
-    defer d1.deinit();
-    try std.testing.expectEqual(@as(i64, 1), d1.years());
-    try std.testing.expectEqual(@as(i64, 3), d1.months());
-    try std.testing.expectEqual(@as(i64, 0), d1.weeks());
-    try std.testing.expectEqual(@as(i64, 0), d1.days());
-
-    const d2 = try Temporal.Duration.from("PT2H30M");
-    defer d2.deinit();
-    try std.testing.expectEqual(@as(i64, 2), d2.hours());
-    try std.testing.expectEqual(@as(i64, 30), d2.minutes());
-    try std.testing.expectEqual(@as(i64, 0), d2.seconds());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/add/blank-duration.js
-test "Temporal.Duration add blank duration" {
-    if (true) return error.SkipZigTest;
-    const d1 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 0, 0);
-    defer d1.deinit();
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-
-    const result = try d1.add(blank);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 1), result.years());
-    try std.testing.expectEqual(@as(i64, 5), result.hours());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/subtract/blank-duration.js
-test "Temporal.Duration subtract blank duration" {
-    if (true) return error.SkipZigTest;
-
-    const d1 = try Temporal.Duration.init(1, 2, 3, 4, 5, 6, 7, 8, 0, 0);
-    defer d1.deinit();
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-
-    const result = try d1.subtract(blank);
-    defer result.deinit();
-    try std.testing.expectEqual(@as(i64, 1), result.years());
-    try std.testing.expectEqual(@as(i64, 5), result.hours());
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/toString/blank-duration-precision.js
-test "Temporal.Duration toString blank with precision" {
-    const allocator = std.testing.allocator;
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-    const str = try blank.toString(allocator, .{});
-    defer allocator.free(str);
-    try std.testing.expectEqualSlices(u8, "PT0S", str);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prototype/toJSON/blank-duration.js (approx)
-test "Temporal.Duration toJSON blank" {
-    const allocator = std.testing.allocator;
-    const blank = try Temporal.Duration.init(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
-    defer blank.deinit();
-    const json = try blank.toJSON(allocator);
-    defer allocator.free(json);
-    try std.testing.expectEqualSlices(u8, "PT0S", json);
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/prop-desc.js
-test "Temporal.Duration property descriptor" {
-    // JS-specific test for property descriptors (writable, enumerable, configurable)
-    // Not directly applicable to Zig bindings
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/subclass.js
-test "Temporal.Duration subclassing" {
-    // JS-specific test for subclassing Temporal.Duration
-    // Zig does not support class inheritance in the same way
-    if (true) return error.SkipZigTest;
-}
-
-// Mirrors test262 test/built-ins/Temporal/Duration/get-prototype-from-constructor-throws.js
-test "Temporal.Duration get prototype from constructor throws" {
-    // JS-specific test for OrdinaryCreateFromConstructor prototype handling
-    // Not applicable to Zig bindings
-    if (true) return error.SkipZigTest;
-}

test/test262/polyfill.js

@@ -0,0 +1,683 @@
+// This polyfill is executed in a vm.Script context by test262-runner,
+// so it must be synchronous and self-contained.
+// The wasm bytes are injected as global.__TEMPORALZ_WASM_BYTES__ by the runner.
+(function () {
+    if (!globalThis.__TEMPORALZ_WASM_BYTES__) {
+        throw new Error("WASM bytes not injected into test context");
+    }
+
+    const wasmBinary = globalThis.__TEMPORALZ_WASM_BYTES__;
+    const wasmModule = new WebAssembly.Module(wasmBinary);
+    const wasmInstance = new WebAssembly.Instance(wasmModule, {
+        env: {
+            console(ptr, len) {
+                const bytes = new Uint8Array(memory.buffer, ptr, len);
+                globalThis.console.log(decoder.decode(bytes));
+            },
+        },
+    });
+
+    const exports = wasmInstance.exports;
+    const memory = exports.memory;
+
+    const encoder = {
+        encode(str) {
+            const buf = [];
+            for (let i = 0; i < str.length; i++) {
+                const code = str.charCodeAt(i);
+                if (code < 0x80) {
+                    buf.push(code);
+                } else if (code < 0x800) {
+                    buf.push(0xc0 | (code >> 6), 0x80 | (code & 0x3f));
+                } else if (code < 0xd800 || code >= 0xe000) {
+                    buf.push(0xe0 | (code >> 12), 0x80 | ((code >> 6) & 0x3f), 0x80 | (code & 0x3f));
+                } else {
+                    const code2 = str.charCodeAt(++i);
+                    const codePoint = 0x10000 + (((code & 0x3ff) << 10) | (code2 & 0x3ff));
+                    buf.push(
+                        0xf0 | (codePoint >> 18),
+                        0x80 | ((codePoint >> 12) & 0x3f),
+                        0x80 | ((codePoint >> 6) & 0x3f),
+                        0x80 | (codePoint & 0x3f)
+                    );
+                }
+            }
+            return new Uint8Array(buf);
+        },
+    };
+
+    const decoder = {
+        decode(bytes) {
+            let str = "";
+            for (let i = 0; i < bytes.length; i++) {
+                const byte = bytes[i];
+                if (byte < 0x80) {
+                    str += String.fromCharCode(byte);
+                } else if ((byte & 0xe0) === 0xc0) {
+                    str += String.fromCharCode(((byte & 0x1f) << 6) | (bytes[++i] & 0x3f));
+                } else if ((byte & 0xf0) === 0xe0) {
+                    str += String.fromCharCode(
+                        ((byte & 0x0f) << 12) | ((bytes[++i] & 0x3f) << 6) | (bytes[++i] & 0x3f)
+                    );
+                } else if ((byte & 0xf8) === 0xf0) {
+                    const codePoint =
+                        ((byte & 0x07) << 18) |
+                        ((bytes[++i] & 0x3f) << 12) |
+                        ((bytes[++i] & 0x3f) << 6) |
+                        (bytes[++i] & 0x3f);
+                    const high = ((codePoint - 0x10000) >> 10) + 0xd800;
+                    const low = ((codePoint - 0x10000) & 0x3ff) + 0xdc00;
+                    str += String.fromCharCode(high, low);
+                }
+            }
+            return str;
+        },
+    };
+
+    function readString(ptr, len) {
+        return decoder.decode(new Uint8Array(memory.buffer, ptr, len));
+    }
+
+    function lastError() {
+        const ptr = exports.temporalz_last_error_ptr();
+        const len = exports.temporalz_last_error_len();
+        if (!ptr || !len) return new Error("temporalz error");
+        const msg = readString(ptr, len);
+        exports.temporalz_last_error_clear();
+        if (msg.includes("Range")) return new RangeError(msg);
+        if (msg.includes("Type")) return new TypeError(msg);
+        return new Error(msg);
+    }
+
+    function requireHandle(handle) {
+        if (!handle) throw lastError();
+        return handle;
+    }
+
+    function allocString(text) {
+        const bytes = encoder.encode(text);
+        const ptr = exports.temporalz_alloc(bytes.length);
+        if (!ptr) throw lastError();
+        new Uint8Array(memory.buffer, ptr, bytes.length).set(bytes);
+        return { ptr, len: bytes.length };
+    }
+
+    function takeString(packed) {
+        if (!packed) throw lastError();
+        const value = BigInt(packed);
+        const ptr = Number(value >> 32n);
+        const len = Number(value & 0xffffffffn);
+        const text = readString(ptr, len);
+        exports.temporalz_string_free(ptr, len);
+        return text;
+    }
+
+    function splitI128(value) {
+        const v = typeof value === "bigint" ? value : BigInt(value);
+        const mask = (1n << 64n) - 1n;
+        return { hi: v >> 64n, lo: v & mask };
+    }
+
+    function joinI128(hi, lo) {
+        const mask = (1n << 64n) - 1n;
+        return (BigInt(hi) << 64n) | (BigInt(lo) & mask);
+    }
+
+    const unitCodes = {
+        nanosecond: 1,
+        microsecond: 2,
+        millisecond: 3,
+        second: 4,
+        minute: 5,
+        hour: 6,
+        day: 7,
+        week: 8,
+        month: 9,
+        year: 10,
+        auto: 11,
+    };
+
+    const roundingModeCodes = {
+        ceil: 1,
+        floor: 2,
+        expand: 3,
+        trunc: 4,
+        halfCeil: 5,
+        halfFloor: 6,
+        halfExpand: 7,
+        halfTrunc: 8,
+        halfEven: 9,
+    };
+
+    function toUnitCode(value, name) {
+        if (value === undefined || value === null) return 255;
+        const code = unitCodes[value];
+        if (!code) throw new RangeError(`Invalid ${name}`);
+        return code;
+    }
+
+    function toRoundingModeCode(value) {
+        if (value === undefined || value === null) return 255;
+        const code = roundingModeCodes[value];
+        if (!code) throw new RangeError("Invalid roundingMode");
+        return code;
+    }
+
+    function toIntegerBigInt(value, name) {
+        if (typeof value === "bigint") return value;
+        const number = Number(value);
+        if (!isFiniteNumber(number)) throw new RangeError(`${name} must be finite`);
+        if (!Number.isInteger(number)) throw new RangeError(`${name} must be an integer`);
+        return BigInt(number);
+    }
+
+    function toNumber(value, name) {
+        const number = Number(value);
+        if (!isFiniteNumber(number)) throw new RangeError(`${name} must be finite`);
+        return number;
+    }
+
+    function toInteger(value, name) {
+        const number = Number(value);
+        if (!isFiniteNumber(number)) throw new RangeError(`${name} must be finite`);
+        if (!Number.isInteger(number)) throw new RangeError(`${name} must be an integer`);
+        return number;
+    }
+
+    function isFiniteNumber(value) {
+        return value === value && value !== Infinity && value !== -Infinity;
+    }
+
+    function unimplemented(name) {
+        return function () {
+            throw new Error(`${name} is not implemented yet`);
+        };
+    }
+
+    class Instant {
+        constructor(handle) {
+            this._handle = handle;
+        }
+
+        static _fromHandle(handle) {
+            return new Instant(handle);
+        }
+
+        static fromEpochMilliseconds(epochMs) {
+            const number = Number(epochMs);
+            if (!isFiniteNumber(number)) throw new RangeError("epochMilliseconds must be finite");
+            const handle = exports.temporalz_instant_from_epoch_milliseconds(number);
+            return Instant._fromHandle(requireHandle(handle));
+        }
+
+        static fromEpochNanoseconds(epochNs) {
+            const parts = splitI128(epochNs);
+            const handle = exports.temporalz_instant_from_epoch_nanoseconds_parts(
+                parts.hi,
+                parts.lo
+            );
+            return Instant._fromHandle(requireHandle(handle));
+        }
+
+        static from(value) {
+            if (value instanceof Instant) return value;
+            if (typeof value === "string") {
+                const text = allocString(value);
+                const handle = exports.temporalz_instant_from_utf8(text.ptr, text.len);
+                exports.temporalz_free(text.ptr, text.len);
+                return Instant._fromHandle(requireHandle(handle));
+            }
+            if (value && typeof value === "object") {
+                if (value.epochNanoseconds !== undefined) {
+                    return Instant.fromEpochNanoseconds(value.epochNanoseconds);
+                }
+                if (value.epochMilliseconds !== undefined) {
+                    return Instant.fromEpochMilliseconds(value.epochMilliseconds);
+                }
+            }
+            throw new TypeError("Instant.from expects a string or object");
+        }
+
+        get epochMilliseconds() {
+            return exports.temporalz_instant_epoch_milliseconds(this._handle);
+        }
+
+        get epochNanoseconds() {
+            const hi = exports.temporalz_instant_epoch_nanoseconds_hi(this._handle);
+            const lo = exports.temporalz_instant_epoch_nanoseconds_lo(this._handle);
+            return joinI128(hi, lo);
+        }
+
+        toString() {
+            return takeString(exports.temporalz_instant_to_string(this._handle));
+        }
+
+        toJSON() {
+            return this.toString();
+        }
+
+        add(durationLike) {
+            const dur = Duration.from(durationLike);
+            const handle = exports.temporalz_instant_add(this._handle, dur._handle);
+            return Instant._fromHandle(requireHandle(handle));
+        }
+
+        subtract(durationLike) {
+            const dur = Duration.from(durationLike);
+            const handle = exports.temporalz_instant_subtract(this._handle, dur._handle);
+            return Instant._fromHandle(requireHandle(handle));
+        }
+
+        round(options) {
+            if (!options || typeof options !== "object") {
+                throw new TypeError("round options must be an object");
+            }
+            const smallestUnit = toUnitCode(options.smallestUnit, "smallestUnit");
+            if (smallestUnit === 255) throw new RangeError("smallestUnit is required");
+            const roundingMode = toRoundingModeCode(options.roundingMode);
+
+            let roundingIncrement = 0;
+            if (options.roundingIncrement !== undefined) {
+                const inc = Number(options.roundingIncrement);
+                if (!isFiniteNumber(inc) || !Number.isInteger(inc) || inc <= 0) {
+                    throw new RangeError("Invalid roundingIncrement");
+                }
+                roundingIncrement = inc;
+            }
+
+            const handle = exports.temporalz_instant_round(
+                this._handle,
+                smallestUnit,
+                roundingMode,
+                roundingIncrement
+            );
+            return Instant._fromHandle(requireHandle(handle));
+        }
+
+        equals(other) {
+            const rhs = Instant.from(other);
+            return exports.temporalz_instant_equals(this._handle, rhs._handle) === 1;
+        }
+
+        toLocaleString() {
+            return this.toString();
+        }
+
+        valueOf() {
+            throw new TypeError("Cannot convert Temporal.Instant to a number");
+        }
+
+        static compare(a, b) {
+            const left = Instant.from(a);
+            const right = Instant.from(b);
+            return Number(exports.temporalz_instant_compare(left._handle, right._handle));
+        }
+    }
+
+    const plainDateHandleToken = Symbol("PlainDateHandle");
+
+    class PlainDate {
+        constructor(year, month, day) {
+            if (year === plainDateHandleToken) {
+                this._handle = month;
+                return;
+            }
+
+            const yearValue = toInteger(year ?? 0, "year");
+            const monthValue = toInteger(month ?? 0, "month");
+            const dayValue = toInteger(day ?? 0, "day");
+            const handle = exports.temporalz_plain_date_init(yearValue, monthValue, dayValue);
+            this._handle = requireHandle(handle);
+        }
+
+        static _fromHandle(handle) {
+            return new PlainDate(plainDateHandleToken, handle);
+        }
+
+        static from(value) {
+            if (value instanceof PlainDate) return value;
+            if (typeof value === "string") {
+                const text = allocString(value);
+                const handle = exports.temporalz_plain_date_from_utf8(text.ptr, text.len);
+                exports.temporalz_free(text.ptr, text.len);
+                return PlainDate._fromHandle(requireHandle(handle));
+            }
+            if (value === null || typeof value !== "object") {
+                throw new TypeError("PlainDate.from expects a string or object");
+            }
+
+            const year = toInteger(value.year, "year");
+            const month = toInteger(value.month, "month");
+            const day = toInteger(value.day, "day");
+            const handle = exports.temporalz_plain_date_init(year, month, day);
+            return PlainDate._fromHandle(requireHandle(handle));
+        }
+
+        toString() {
+            return takeString(exports.temporalz_plain_date_to_string(this._handle));
+        }
+    }
+
+    const durationHandleToken = Symbol("DurationHandle");
+
+    class Duration {
+        constructor(
+            years,
+            months,
+            weeks,
+            days,
+            hours,
+            minutes,
+            seconds,
+            milliseconds,
+            microseconds,
+            nanoseconds
+        ) {
+            if (years === durationHandleToken) {
+                this._handle = months;
+                return;
+            }
+
+            const yearsValue = toIntegerBigInt(years ?? 0, "years");
+            const monthsValue = toIntegerBigInt(months ?? 0, "months");
+            const weeksValue = toIntegerBigInt(weeks ?? 0, "weeks");
+            const daysValue = toIntegerBigInt(days ?? 0, "days");
+            const hoursValue = toIntegerBigInt(hours ?? 0, "hours");
+            const minutesValue = toIntegerBigInt(minutes ?? 0, "minutes");
+            const secondsValue = toIntegerBigInt(seconds ?? 0, "seconds");
+            const millisecondsValue = toIntegerBigInt(milliseconds ?? 0, "milliseconds");
+            const microsecondsValue = toNumber(microseconds ?? 0, "microseconds");
+            const nanosecondsValue = toNumber(nanoseconds ?? 0, "nanoseconds");
+
+            const created = exports.temporalz_duration_init(
+                yearsValue,
+                monthsValue,
+                weeksValue,
+                daysValue,
+                hoursValue,
+                minutesValue,
+                secondsValue,
+                millisecondsValue,
+                microsecondsValue,
+                nanosecondsValue
+            );
+            this._handle = requireHandle(created);
+        }
+
+        static _fromHandle(handle) {
+            return new Duration(durationHandleToken, handle);
+        }
+
+        static from(value) {
+            if (value instanceof Duration) return value;
+            if (typeof value === "string") {
+                const text = allocString(value);
+                const handle = exports.temporalz_duration_from_utf8(text.ptr, text.len);
+                exports.temporalz_free(text.ptr, text.len);
+                return Duration._fromHandle(requireHandle(handle));
+            }
+            if (value === null || typeof value !== "object") {
+                throw new TypeError("Duration.from expects a string or object");
+            }
+
+            const fields = [
+                "years",
+                "months",
+                "weeks",
+                "days",
+                "hours",
+                "minutes",
+                "seconds",
+                "milliseconds",
+                "microseconds",
+                "nanoseconds",
+            ];
+
+            let mask = 0;
+            const values = [0n, 0n, 0n, 0n, 0n, 0n, 0n, 0n, 0, 0];
+
+            fields.forEach((field, index) => {
+                if (value[field] !== undefined) {
+                    mask |= 1 << index;
+                    if (field === "microseconds" || field === "nanoseconds") {
+                        values[index] = toNumber(value[field], field);
+                    } else {
+                        values[index] = toIntegerBigInt(value[field], field);
+                    }
+                }
+            });
+
+            const handle = exports.temporalz_duration_from_parts(
+                mask,
+                values[0],
+                values[1],
+                values[2],
+                values[3],
+                values[4],
+                values[5],
+                values[6],
+                values[7],
+                values[8],
+                values[9]
+            );
+            return Duration._fromHandle(requireHandle(handle));
+        }
+
+        static compare(a, b, options) {
+            const left = Duration.from(a);
+            const right = Duration.from(b);
+            return Duration.compareWithOptions(left, right, options);
+        }
+
+        static compareWithOptions(left, right, options) {
+            if (options !== undefined && (options === null || typeof options !== "object")) {
+                throw new TypeError("options must be an object");
+            }
+            const relativeTo = toRelativeTo(options);
+            if (!relativeTo && (hasYearMonthWeek(left) || hasYearMonthWeek(right))) {
+                throw new RangeError("relativeTo is required for calendar units");
+            }
+            if (relativeTo) {
+                return Number(
+                    exports.temporalz_duration_compare_plain_date(
+                        left._handle,
+                        right._handle,
+                        relativeTo._handle
+                    )
+                );
+            }
+            return Number(exports.temporalz_duration_compare(left._handle, right._handle));
+        }
+
+        add(other) {
+            const rhs = Duration.from(other);
+            const handle = exports.temporalz_duration_add(this._handle, rhs._handle);
+            return Duration._fromHandle(requireHandle(handle));
+        }
+
+        subtract(other) {
+            const rhs = Duration.from(other);
+            const handle = exports.temporalz_duration_subtract(this._handle, rhs._handle);
+            return Duration._fromHandle(requireHandle(handle));
+        }
+
+        abs() {
+            const handle = exports.temporalz_duration_abs(this._handle);
+            return Duration._fromHandle(requireHandle(handle));
+        }
+
+        negated() {
+            const handle = exports.temporalz_duration_negated(this._handle);
+            return Duration._fromHandle(requireHandle(handle));
+        }
+
+        round(options = {}) {
+            if (options === undefined) options = {};
+            if (options === null || typeof options !== "object") {
+                throw new TypeError("round options must be an object");
+            }
+            const relativeTo = toRelativeTo(options);
+            if (!relativeTo && hasCalendarUnits(this)) {
+                throw new RangeError("relativeTo is required for calendar units");
+            }
+            const smallestUnit = toUnitCode(options.smallestUnit, "smallestUnit");
+            const largestUnit = toUnitCode(options.largestUnit, "largestUnit");
+            const roundingMode = toRoundingModeCode(options.roundingMode);
+
+            let roundingIncrement = 0;
+            if (options.roundingIncrement !== undefined) {
+                const inc = Number(options.roundingIncrement);
+                if (!Number.isFinite(inc) || !Number.isInteger(inc) || inc <= 0) {
+                    throw new RangeError("Invalid roundingIncrement");
+                }
+                roundingIncrement = inc;
+            }
+
+            const handle = relativeTo
+                ? exports.temporalz_duration_round_plain_date(
+                    this._handle,
+                    smallestUnit,
+                    largestUnit,
+                    roundingMode,
+                    roundingIncrement,
+                    relativeTo._handle
+                )
+                : exports.temporalz_duration_round(
+                    this._handle,
+                    smallestUnit,
+                    largestUnit,
+                    roundingMode,
+                    roundingIncrement
+                );
+            return Duration._fromHandle(requireHandle(handle));
+        }
+
+        total(options) {
+            if (!options || typeof options !== "object") {
+                throw new TypeError("total options must be an object");
+            }
+            const relativeTo = toRelativeTo(options);
+            if (!relativeTo && hasCalendarUnits(this)) {
+                throw new RangeError("relativeTo is required for calendar units");
+            }
+            const unit = toUnitCode(options.unit, "unit");
+            if (unit === 255) throw new RangeError("Invalid unit");
+            const result = relativeTo
+                ? exports.temporalz_duration_total_plain_date(
+                    this._handle,
+                    unit,
+                    relativeTo._handle
+                )
+                : exports.temporalz_duration_total(this._handle, unit);
+            if (!Number.isFinite(result)) throw lastError();
+            return result;
+        }
+
+        get sign() {
+            return Number(exports.temporalz_duration_sign(this._handle));
+        }
+
+        get blank() {
+            return exports.temporalz_duration_blank(this._handle) === 1;
+        }
+
+        toString() {
+            return takeString(exports.temporalz_duration_to_string(this._handle));
+        }
+
+        toJSON() {
+            return this.toString();
+        }
+
+        toLocaleString() {
+            return this.toString();
+        }
+
+        valueOf() {
+            throw new TypeError("Cannot convert Temporal.Duration to a number");
+        }
+
+        get years() {
+            return Number(exports.temporalz_duration_years(this._handle));
+        }
+
+        get months() {
+            return Number(exports.temporalz_duration_months(this._handle));
+        }
+
+        get weeks() {
+            return Number(exports.temporalz_duration_weeks(this._handle));
+        }
+
+        get days() {
+            return Number(exports.temporalz_duration_days(this._handle));
+        }
+
+        get hours() {
+            return Number(exports.temporalz_duration_hours(this._handle));
+        }
+
+        get minutes() {
+            return Number(exports.temporalz_duration_minutes(this._handle));
+        }
+
+        get seconds() {
+            return Number(exports.temporalz_duration_seconds(this._handle));
+        }
+
+        get milliseconds() {
+            return Number(exports.temporalz_duration_milliseconds(this._handle));
+        }
+
+        get microseconds() {
+            return Number(exports.temporalz_duration_microseconds(this._handle));
+        }
+
+        get nanoseconds() {
+            return Number(exports.temporalz_duration_nanoseconds(this._handle));
+        }
+    }
+
+    function hasCalendarUnits(duration) {
+        return (
+            duration.years !== 0 ||
+            duration.months !== 0 ||
+            duration.weeks !== 0 ||
+            duration.days !== 0
+        );
+    }
+
+    function hasYearMonthWeek(duration) {
+        return duration.years !== 0 || duration.months !== 0 || duration.weeks !== 0;
+    }
+
+    function toRelativeTo(options) {
+        if (!options || options.relativeTo === undefined) return null;
+        const rel = options.relativeTo;
+        if (rel instanceof PlainDate) return rel;
+        if (typeof rel === "string") return PlainDate.from(rel);
+        if (rel && typeof rel === "object") return PlainDate.from(rel);
+        throw new TypeError("Invalid relativeTo");
+    }
+
+    const Temporal = {
+        Instant,
+        Duration,
+        Now: {
+            instant: unimplemented("Temporal.Now.instant"),
+            plainDateISO: unimplemented("Temporal.Now.plainDateISO"),
+            plainDateTimeISO: unimplemented("Temporal.Now.plainDateTimeISO"),
+            plainTimeISO: unimplemented("Temporal.Now.plainTimeISO"),
+            timeZoneId: unimplemented("Temporal.Now.timeZoneId"),
+            zonedDateTimeISO: unimplemented("Temporal.Now.zonedDateTimeISO"),
+        },
+        PlainDate,
+        PlainTime: unimplemented("Temporal.PlainTime"),
+        PlainDateTime: unimplemented("Temporal.PlainDateTime"),
+        PlainYearMonth: unimplemented("Temporal.PlainYearMonth"),
+        PlainMonthDay: unimplemented("Temporal.PlainMonthDay"),
+        ZonedDateTime: unimplemented("Temporal.ZonedDateTime"),
+    };
+
+    globalThis.Temporal = Temporal;
+})();

test/test262/root.zig

@@ -1,3 +0,0 @@
-test {
-    _ = @import("duration.zig");
-}

test/test262/runner.mjs

@@ -0,0 +1,35 @@
+import runTest262 from "../temporal-test262-runner/index.mjs";
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const wasmPath =
+    process.env.TEMPORALZ_WASM ||
+    path.resolve(__dirname, "../../zig-out/bin/temporalz.wasm");
+const wasmBytes = fs.readFileSync(wasmPath);
+
+const polyfillPath = path.resolve(__dirname, "../test262/polyfill.js");
+let polyfillCode = fs.readFileSync(polyfillPath, "utf-8");
+
+const bytesArray = JSON.stringify(Array.from(wasmBytes));
+// TextEncoder/TextDecoder need to be manually constructed and passed via context
+// Since we can't serialize them, we inject polyfill-compatible shim versions
+const injection = `globalThis.__TEMPORALZ_WASM_BYTES__ = new Uint8Array(${bytesArray});
+`;
+polyfillCode = injection + polyfillCode;
+
+const tempPolyfillPath = path.resolve(__dirname, "../test262/polyfill-injected.js");
+fs.writeFileSync(tempPolyfillPath, polyfillCode);
+
+const result = runTest262({
+    test262Dir: "test/temporal-test262-runner/test262",
+    polyfillCodeFile: tempPolyfillPath,
+    testGlobs: process.argv.slice(2),
+});
+
+fs.unlinkSync(tempPolyfillPath);
+
+process.exit(result ? 0 : 1);