// Copyright (c) 2014, 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.

import 'dart:async';

import 'package:test/test.dart';
import 'package:test_api/hooks_testing.dart';

import '../utils_new.dart';

void main() {
  group('synchronous', () {
    test('passes with an expected print', () {
      expect(() => print('Hello, world!'), prints('Hello, world!\n'));
    });

    test('combines multiple prints', () {
      expect(() {
        print('Hello');
        print('World!');
      }, prints('Hello\nWorld!\n'));
    });

    test('works with a Matcher', () {
      expect(() => print('Hello, world!'), prints(contains('Hello')));
    });

    test('describes a failure nicely', () async {
      void local() => print('Hello, world!');
      var monitor = await TestCaseMonitor.run(() {
        expect(local, prints('Goodbye, world!\n'));
      });

      expectTestFailed(
        monitor,
        allOf([
          startsWith(
            "Expected: prints 'Goodbye, world!\\n'\n"
            "            ''\n"
            '  Actual: <',
          ),
          endsWith(
            '>\n'
            "   Which: printed 'Hello, world!\\n'\n"
            "                    ''\n"
            '            which is different.\n'
            '                  Expected: Goodbye, w ...\n'
            '                    Actual: Hello, wor ...\n'
            '                            ^\n'
            '                   Differ at offset 0\n',
          ),
        ]),
      );
    });

    test('describes a failure with a non-descriptive Matcher nicely', () async {
      void local() => print('Hello, world!');
      var monitor = await TestCaseMonitor.run(() {
        expect(local, prints(contains('Goodbye')));
      });

      expectTestFailed(
        monitor,
        allOf([
          startsWith(
            "Expected: prints contains 'Goodbye'\n"
            '  Actual: <',
          ),
          endsWith(
            '>\n'
            "   Which: printed 'Hello, world!\\n'\n"
            "                    ''\n"
            '            which does not contain \'Goodbye\'\n',
          ),
        ]),
      );
    });

    test('describes a failure with no text nicely', () async {
      void local() {}
      var monitor = await TestCaseMonitor.run(() {
        expect(local, prints(contains('Goodbye')));
      });

      expectTestFailed(
        monitor,
        allOf([
          startsWith(
            "Expected: prints contains 'Goodbye'\n"
            '  Actual: <',
          ),
          endsWith(
            '>\n'
            '   Which: printed nothing\n'
            '            which does not contain \'Goodbye\'\n',
          ),
        ]),
      );
    });

    test('with a non-function', () async {
      var monitor = await TestCaseMonitor.run(() {
        expect(10, prints(contains('Goodbye')));
      });

      expectTestFailed(
        monitor,
        "Expected: prints contains 'Goodbye'\n"
        '  Actual: <10>\n'
        '   Which: was not a unary Function\n',
      );
    });
  });

  group('asynchronous', () {
    test('passes with an expected print', () {
      expect(
        () => Future(() => print('Hello, world!')),
        prints('Hello, world!\n'),
      );
    });

    test('combines multiple prints', () {
      expect(
        () => Future(() {
          print('Hello');
          print('World!');
        }),
        prints('Hello\nWorld!\n'),
      );
    });

    test('works with a Matcher', () {
      expect(
        () => Future(() => print('Hello, world!')),
        prints(contains('Hello')),
      );
    });

    test('describes a failure nicely', () async {
      void local() => Future(() => print('Hello, world!'));
      var monitor = await TestCaseMonitor.run(() {
        expect(local, prints('Goodbye, world!\n'));
      });

      expectTestFailed(
        monitor,
        allOf([
          startsWith(
            "Expected: prints 'Goodbye, world!\\n'\n"
            "            ''\n"
            '  Actual: <',
          ),
          contains(
            '>\n'
            "   Which: printed 'Hello, world!\\n'\n"
            "                    ''\n"
            '            which is different.\n'
            '                  Expected: Goodbye, w ...\n'
            '                    Actual: Hello, wor ...\n'
            '                            ^\n'
            '                   Differ at offset 0',
          ),
        ]),
      );
    });

    test('describes a failure with a non-descriptive Matcher nicely', () async {
      void local() => Future(() => print('Hello, world!'));
      var monitor = await TestCaseMonitor.run(() {
        expect(local, prints(contains('Goodbye')));
      });

      expectTestFailed(
        monitor,
        allOf([
          startsWith(
            "Expected: prints contains 'Goodbye'\n"
            '  Actual: <',
          ),
          contains(
            '>\n'
            "   Which: printed 'Hello, world!\\n'\n"
            "                    ''",
          ),
        ]),
      );
    });

    test('describes a failure with no text nicely', () async {
      void local() => Future<void>.value();
      var monitor = await TestCaseMonitor.run(() {
        expect(local, prints(contains('Goodbye')));
      });

      expectTestFailed(
        monitor,
        allOf([
          startsWith(
            "Expected: prints contains 'Goodbye'\n"
            '  Actual: <',
          ),
          contains(
            '>\n'
            '   Which: printed nothing',
          ),
        ]),
      );
    });

    test("won't let the test end until the Future completes", () async {
      final completer = Completer<void>();
      final monitor = TestCaseMonitor.start(() {
        expect(() => completer.future, prints(isEmpty));
      });
      await pumpEventQueue();
      expect(monitor.state, State.running);
      completer.complete();
      await monitor.onDone;
      expectTestPassed(monitor);
    });

    test("blocks expectLater's Future", () async {
      var completer = Completer<void>();
      var fired = false;

      unawaited(
        expectLater(() {
          scheduleMicrotask(() => print('hello!'));
          return completer.future;
        }, prints('hello!\n')).then((_) {
          fired = true;
        }),
      );

      await pumpEventQueue();
      expect(fired, isFalse);

      completer.complete();
      await pumpEventQueue();
      expect(fired, isTrue);
    });
  });
}