1// Copyright 2014 The Flutter Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5/// @docImport 'package:integration_test/integration_test.dart';
6library;
7
8import 'dart:convert';
9import 'dart:io';
10
11import 'package:flutter_test/flutter_test.dart';
12import 'package:path/path.dart' as path;
13
14final String bat = Platform.isWindows ? '.bat' : '';
15final String _flutterBin = path.join(Directory.current.parent.parent.path, 'bin', 'flutter$bat');
16const String _integrationResultsPrefix = 'IntegrationTestWidgetsFlutterBinding test results:';
17const String _failureExcerpt = r'Expected: <false>\n Actual: <true>';
18
19Future<void> main() async {
20 group('Integration binding result', () {
21 test('when multiple tests pass', () async {
22 final Map<String, dynamic>? results = await _runTest(
23 path.join('test', 'data', 'pass_test_script.dart'),
24 );
25
26 expect(
27 results,
28 equals(<String, dynamic>{'passing test 1': 'success', 'passing test 2': 'success'}),
29 );
30 });
31
32 test('when multiple tests fail', () async {
33 final Map<String, dynamic>? results = await _runTest(
34 path.join('test', 'data', 'fail_test_script.dart'),
35 );
36
37 expect(results, hasLength(2));
38 expect(results, containsPair('failing test 1', contains(_failureExcerpt)));
39 expect(results, containsPair('failing test 2', contains(_failureExcerpt)));
40 });
41
42 test('when one test passes, then another fails', () async {
43 final Map<String, dynamic>? results = await _runTest(
44 path.join('test', 'data', 'pass_then_fail_test_script.dart'),
45 );
46
47 expect(results, hasLength(2));
48 expect(results, containsPair('passing test', equals('success')));
49 expect(results, containsPair('failing test', contains(_failureExcerpt)));
50 });
51
52 test('when one test fails, then another passes', () async {
53 final Map<String, dynamic>? results = await _runTest(
54 path.join('test', 'data', 'fail_then_pass_test_script.dart'),
55 );
56
57 expect(results, hasLength(2));
58 expect(results, containsPair('failing test', contains(_failureExcerpt)));
59 expect(results, containsPair('passing test', equals('success')));
60 });
61 });
62}
63
64/// Runs a test script and returns the [IntegrationTestWidgetsFlutterBinding.results].
65///
66/// [scriptPath] is relative to the package root.
67Future<Map<String, dynamic>?> _runTest(String scriptPath) async {
68 final Process process = await Process.start(_flutterBin, <String>[
69 'test',
70 '--machine',
71 scriptPath,
72 ]);
73
74 /// In the test [tearDownAll] block, the test results are encoded into JSON and
75 /// are printed with the [_integrationResultsPrefix] prefix.
76 ///
77 /// See the following for the test event spec which we parse the printed lines
78 /// out of: https://github.com/dart-lang/test/blob/master/pkgs/test/doc/json_reporter.md
79 final String testResults = (await process.stdout
80 .transform(utf8.decoder)
81 .expand((String text) => text.split('\n'))
82 .map<dynamic>((String line) {
83 try {
84 return jsonDecode(line);
85 } on FormatException {
86 // Only interested in test events which are JSON.
87 }
88 })
89 .expand<Map<String, dynamic>>((dynamic json) {
90 if (json is List<dynamic>) {
91 return json.cast();
92 }
93 return <Map<String, dynamic>>[if (json != null) json as Map<String, dynamic>];
94 })
95 .where((Map<String, dynamic> testEvent) => testEvent['type'] == 'print')
96 .map((Map<String, dynamic> printEvent) => printEvent['message'] as String)
97 .firstWhere(
98 (String message) => message.startsWith(_integrationResultsPrefix),
99 )).replaceAll(_integrationResultsPrefix, '');
100
101 return jsonDecode(testResults) as Map<String, dynamic>?;
102}
103

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