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// Copyright 2014 The Flutter Authors. 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:convert';
import 'dart:io';
import 'package:flutter_test/flutter_test.dart';
import 'package:path/path.dart' as path;
final String bat = Platform.isWindows ? '.bat' : '';
final String _flutterBin = path.join(Directory.current.parent.parent.path, 'bin', 'flutter$bat');
const String _integrationResultsPrefix = 'IntegrationTestWidgetsFlutterBinding test results:';
const String _failureExcerpt = r'Expected: <false>\n Actual: <true>';
Future<void> main() async {
group('Integration binding result', () {
test('when multiple tests pass', () async {
final Map<String, dynamic>? results = await _runTest(path.join('test', 'data', 'pass_test_script.dart'));
expect(
results,
equals(<String, dynamic>{
'passing test 1': 'success',
'passing test 2': 'success',
}));
});
test('when multiple tests fail', () async {
final Map<String, dynamic>? results = await _runTest(path.join('test', 'data', 'fail_test_script.dart'));
expect(results, hasLength(2));
expect(results, containsPair('failing test 1', contains(_failureExcerpt)));
expect(results, containsPair('failing test 2', contains(_failureExcerpt)));
});
test('when one test passes, then another fails', () async {
final Map<String, dynamic>? results = await _runTest(path.join('test', 'data', 'pass_then_fail_test_script.dart'));
expect(results, hasLength(2));
expect(results, containsPair('passing test', equals('success')));
expect(results, containsPair('failing test', contains(_failureExcerpt)));
});
test('when one test fails, then another passes', () async {
final Map<String, dynamic>? results = await _runTest(path.join('test', 'data', 'fail_then_pass_test_script.dart'));
expect(results, hasLength(2));
expect(results, containsPair('failing test', contains(_failureExcerpt)));
expect(results, containsPair('passing test', equals('success')));
});
});
}
/// Runs a test script and returns the [IntegrationTestWidgetsFlutterBinding.result].
///
/// [scriptPath] is relative to the package root.
Future<Map<String, dynamic>?> _runTest(String scriptPath) async {
final Process process =
await Process.start(_flutterBin, <String>['test', '--machine', scriptPath]);
/// In the test [tearDownAll] block, the test results are encoded into JSON and
/// are printed with the [_integrationResultsPrefix] prefix.
///
/// See the following for the test event spec which we parse the printed lines
/// out of: https://github.com/dart-lang/test/blob/master/pkgs/test/doc/json_reporter.md
final String testResults = (await process.stdout
.transform(utf8.decoder)
.expand((String text) => text.split('\n'))
.map<dynamic>((String line) {
try {
return jsonDecode(line);
} on FormatException {
// Only interested in test events which are JSON.
}
})
.expand<Map<String, dynamic>>((dynamic json) {
if (json is List<dynamic>) {
return json.cast();
}
return <Map<String, dynamic>>[
if (json != null)
json as Map<String, dynamic>,
];
})
.where((Map<String, dynamic> testEvent) => testEvent['type'] == 'print')
.map((Map<String, dynamic> printEvent) => printEvent['message'] as String)
.firstWhere((String message) => message.startsWith(_integrationResultsPrefix)))
.replaceAll(_integrationResultsPrefix, '');
return jsonDecode(testResults) as Map<String, dynamic>?;
}