Add Date tests

Author: nex3

.github/workflows/js_interop.yaml

@@ -0,0 +1,44 @@
+name: package:js_interop
+permissions: read-all
+
+on:
+  # Run CI on pushes to the main branch and on PRs.
+  push:
+    branches: [ main ]
+    paths:
+      - '.github/workflows/js_interop.yaml'
+      - 'js_interop/**'
+  pull_request:
+    paths:
+      - '.github/workflows/js_interop.yaml'
+      - 'js_interop/**'
+  schedule:
+    - cron: "0 0 * * 0"
+
+defaults:
+  run:
+    working-directory: js_interop/
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sdk: [3.9, beta, dev]
+        test_config: ['-p chrome', '-p chrome -c dart2wasm', '-p node']
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - uses: dart-lang/setup-dart@e51d8e571e22473a2ddebf0ef8a2123f0ab2c02c
+        with:
+          sdk: ${{ matrix.sdk }}
+
+      - run: dart pub get
+      - run: dart format --output=none --set-exit-if-changed .
+        if: ${{ matrix.sdk == 'dev' }}
+      - run: dart analyze --fatal-infos
+      - run: dart test ${{ matrix.test_config }}
+
+      # Validate the 'dart fix' metadata.
+      - run: dart fix --compare-to-golden test_fixes

js_interop/dart_test.yaml

@@ -0,0 +1 @@
+platforms: [chrome, node]

js_interop/pubspec.yaml

@@ -5,3 +5,6 @@ repository: https://github.com/dart-lang/web
 
 environment:
   sdk: ^3.9.0
+
+dev_dependencies:
+  test: ^1.26.0

js_interop/test/date_test.dart

@@ -0,0 +1,209 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.p
+
+import 'dart:js_interop';
+
+import 'package:test/test.dart';
+
+import 'package:js_interop/js_interop.dart';
+
+final Matcher _isDate = predicate(
+  (jsDate) => jsDate is JSObject && jsDate.isA<JSDate>(),
+  "is a JSDate",
+);
+
+void main() {
+  group('constructors', () {
+    test('nowAsDate', () => expect(JSDate.nowAsDate(), _isDate));
+
+    test(
+      'fromMillisecondsSinceEpoch',
+      () => expect(JSDate.fromMillisecondsSinceEpoch(1234567890), _isDate),
+    );
+
+    test('parseAsDate', () => expect(JSDate.parseAsDate("11 Nov 2025"), _isDate));
+
+    test('from', () => expect(JSDate.from(JSDate.nowAsDate()), _isDate));
+
+    group('localDate', () {
+      test(
+        'with no optional args',
+        () => expect(JSDate.localDate(2025, 11), _isDate),
+      );
+
+      test(
+        'with all optional args',
+        () => expect(JSDate.localDate(2025, 11, 11, 12, 2, 15, 120), _isDate),
+      );
+    });
+
+    group('utcDate', () {
+      test(
+        'with no optional args',
+        () => expect(JSDate.utcDate(2025, 11), _isDate),
+      );
+
+      test(
+        'with one optional arg',
+        () => expect(JSDate.utcDate(2025, 11, 11), _isDate),
+      );
+
+      test(
+        'with two optional args',
+        () => expect(JSDate.utcDate(2025, 11, 11, 12), _isDate),
+      );
+
+      test(
+        'with three optional args',
+        () => expect(JSDate.utcDate(2025, 11, 11, 12, 2), _isDate),
+      );
+
+      test(
+        'with four optional arg',
+        () => expect(JSDate.utcDate(2025, 11, 11, 12, 2, 15), _isDate),
+      );
+
+      test(
+        'with all optional args',
+        () => expect(JSDate.utcDate(2025, 11, 11, 12, 2, 15, 120), _isDate),
+      );
+    });
+  });
+
+  group('static', () {
+    test(
+      'nowAsMillisecondsSinceEpoch',
+      () => expect(JSDate.nowAsMillisecondsSinceEpoch(), isA<int>()),
+    );
+
+    test(
+      'parseAsMillisecondsSinceEpoch',
+      () => expect(
+        JSDate.parseAsMillisecondsSinceEpoch("11 Nov 2025"),
+        isA<int>(),
+      ),
+    );
+
+    group('utcAsMillisecondsSinceEpoch', () {
+      test(
+        'with no optional args',
+        () => expect(JSDate.utcAsMillisecondsSinceEpoch(2025, 11), isA<int>()),
+      );
+
+      test(
+        'with all optional args',
+        () => expect(
+          JSDate.utcAsMillisecondsSinceEpoch(2025, 11, 11, 12, 2, 15, 120),
+          isA<int>(),
+        ),
+      );
+    });
+  });
+
+  group('instance', () {
+    late JSDate date;
+    setUp(() => date = JSDate.nowAsDate());
+
+    test('date', () {
+      date.date = 12;
+      expect(date.date, equals(12));
+    });
+
+    test('day', () => expect(date.day, isA<int>()));
+
+    test('fullYear', () {
+      date.fullYear = 2026;
+      expect(date.fullYear, equals(2026));
+    });
+
+    test('hours', () {
+      date.hours = 13;
+      expect(date.hours, equals(13));
+    });
+
+    test('milliseconds', () {
+      date.milliseconds = 123;
+      expect(date.milliseconds, equals(123));
+    });
+
+    test('minutes', () {
+      date.minutes = 5;
+      expect(date.minutes, equals(5));
+    });
+
+    test('month', () {
+      date.month = 1;
+      expect(date.month, equals(1));
+    });
+
+    test('seconds', () {
+      date.seconds = 5;
+      expect(date.seconds, equals(5));
+    });
+
+    test('time', () {
+      date.time = 1234567890;
+      expect(date.time, equals(1234567890));
+    });
+
+    test('timezoneOffset', () => expect(date.timezoneOffset, isA<int>()));
+
+    test('utcDate', () {
+      date.utcDate = 12;
+      expect(date.utcDate, equals(12));
+    });
+
+    test('utcFullYear', () {
+      date.utcFullYear = 2026;
+      expect(date.utcFullYear, equals(2026));
+    });
+
+    test('utcHours', () {
+      date.utcHours = 13;
+      expect(date.utcHours, equals(13));
+    });
+
+    test('utcMilliseconds', () {
+      date.utcMilliseconds = 123;
+      expect(date.utcMilliseconds, equals(123));
+    });
+
+    test('utcMinutes', () {
+      date.utcMinutes = 5;
+      expect(date.utcMinutes, equals(5));
+    });
+
+    test('utcMonth', () {
+      date.utcMonth = 1;
+      expect(date.utcMonth, equals(1));
+    });
+
+    test('utcSeconds', () {
+      date.utcSeconds = 5;
+      expect(date.utcSeconds, equals(5));
+    });
+
+    test('toDateString', () => expect(date.toDateString(), isA<String>()));
+
+    test('toIsoString:', () => expect(date.toIsoString(), isA<String>()));
+
+    test('toTimeString:', () => expect(date.toTimeString(), isA<String>()));
+
+    test('toUtcString:', () => expect(date.toUtcString(), isA<String>()));
+
+    test('toDart', () {
+      var dartDate = date.toDart;
+      expect(dartDate, isA<DateTime>());
+      expect(dartDate.timeZoneName, equals(DateTime.now().timeZoneName));
+    });
+
+    test('toDartUtc', () {
+      var dartDate = date.toDartUtc;
+      expect(dartDate, isA<DateTime>());
+      expect(dartDate.timeZoneName, equals("UTC"));
+    });
+
+    test('from Dart', () => expect(DateTime.now().toJS, _isDate));
+  });
+}