39 lines
1.4 KiB
Dart
39 lines
1.4 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter_tools/src/base/time.dart';
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import '../src/common.dart';
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void main() {
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group(SystemClock, () {
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test('can set a fixed time', () {
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final clock = SystemClock.fixed(DateTime(1991, 8, 23));
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expect(clock.now(), DateTime(1991, 8, 23));
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});
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test('can find a time ago', () {
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final clock = SystemClock.fixed(DateTime(1991, 8, 23));
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expect(clock.ago(const Duration(days: 10)), DateTime(1991, 8, 13));
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});
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});
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group('formatting', () {
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test('can round-trip formatted time', () {
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final time = DateTime(1991, 7, 31);
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expect(time.isUtc, isFalse);
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// formatDateTime() adds a timezone offset to DateTime.toString().
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final String formattedTime = formatDateTime(time);
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// If a date time string has a timezone offset, DateTime.tryParse()
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// converts the parsed time to UTC.
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final DateTime? parsedTime = DateTime.tryParse(formattedTime);
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expect(parsedTime, isNotNull);
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expect(parsedTime!.isUtc, isTrue);
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// Convert the parsed time (which should be utc) to the local timezone and
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// compare against the original time which is in the local timezone. They
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// should be the same.
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expect(parsedTime.toLocal(), equals(time));
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});
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});
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}
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