lib/web_ui/dev/steps/run_tests_step.dart - mirrors/engine - Git at Google

 // Copyright 2013 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:io' as io;

 import 'package:path/path.dart' as pathlib;
 // TODO(yjbanov): remove hacks when this is fixed:
 //                https://github.com/dart-lang/test/issues/1521
 import 'package:test_api/src/backend/group.dart' as hack;
 import 'package:test_api/src/backend/live_test.dart' as hack;
 import 'package:test_api/src/backend/runtime.dart' as hack;
 import 'package:test_core/src/executable.dart' as test;
 import 'package:test_core/src/runner/configuration/reporters.dart' as hack;
 import 'package:test_core/src/runner/engine.dart' as hack;
 import 'package:test_core/src/runner/hack_register_platform.dart' as hack;
 import 'package:test_core/src/runner/reporter.dart' as hack;

 import '../browser.dart';
 import '../environment.dart';
 import '../exceptions.dart';
 import '../pipeline.dart';
 import '../test_platform.dart';
 import '../utils.dart';

 // Maximum number of tests that run concurrently.
 const int _testConcurrency = int.fromEnvironment('FELT_TEST_CONCURRENCY', defaultValue: 10);

 /// Runs web tests.
 ///
 /// Assumes the artifacts from [CompileTestsStep] are available, either from
 /// running it prior to this step locally, or by having the build graph copy
 /// them from another bot.
 class RunTestsStep implements PipelineStep {
   RunTestsStep({
     required this.browserEnvironment,
     required this.isDebug,
     required this.doUpdateScreenshotGoldens,
     this.testFiles,
   });

   final BrowserEnvironment browserEnvironment;
   final List<FilePath>? testFiles;
   final bool isDebug;
   final bool doUpdateScreenshotGoldens;

   /// Global list of shards that failed.
   ///
   /// This is used to make sure that when there's a test failure anywhere we
   /// exit with a non-zero exit code.
   ///
   /// Shards must never be removed from this list, only added.
   List<String> failedShards = <String>[];

   /// Whether all test shards succeeded.
   bool get allShardsPassed => failedShards.isEmpty;

   @override
   String get description => 'run_tests';

   @override
   bool get isSafeToInterrupt => true;

   @override
   Future<void> interrupt() async {}

   @override
   Future<void> run() async {
     _copyTestFontsIntoWebUi();
     await _prepareTestResultsDirectory();
     await browserEnvironment.prepareEnvironment();

     final List<FilePath> testFiles = this.testFiles ?? findAllTests();

     // Separate screenshot tests from unit-tests. Screenshot tests must run
     // one at a time. Otherwise, they will end up screenshotting each other.
     // This is not an issue for unit-tests.
     final FilePath failureSmokeTestPath = FilePath.fromWebUi(
       'test/golden_tests/golden_failure_smoke_test.dart',
     );
     final List<FilePath> screenshotTestFiles = <FilePath>[];
     final List<FilePath> unitTestFiles = <FilePath>[];

     for (final FilePath testFilePath in testFiles) {
       if (!testFilePath.absolute.endsWith('_test.dart')) {
         // Not a test file at all. Skip.
         continue;
       }
       if (testFilePath == failureSmokeTestPath) {
         // A smoke test that fails on purpose. Skip.
         continue;
       }

       // All files under test/golden_tests are considered golden tests.
       final bool isUnderGoldenTestsDirectory =
           pathlib.split(testFilePath.relativeToWebUi).contains('golden_tests');
       // Any file whose name ends with "_golden_test.dart" is run as a golden test.
       final bool isGoldenTestFile = pathlib
           .basename(testFilePath.relativeToWebUi)
           .endsWith('_golden_test.dart');
       if (isUnderGoldenTestsDirectory || isGoldenTestFile) {
         screenshotTestFiles.add(testFilePath);
       } else {
         unitTestFiles.add(testFilePath);
       }
     }

     // This test returns a non-zero exit code on purpose. Run it separately.
     if (testFiles.contains(failureSmokeTestPath)) {
       await _runTestBatch(
         testFiles: <FilePath>[failureSmokeTestPath],
         browserEnvironment: browserEnvironment,
         concurrency: 1,
         expectFailure: true,
         isDebug: isDebug,
         doUpdateScreenshotGoldens: doUpdateScreenshotGoldens,
       );
     }

     // Run non-screenshot tests with high concurrency.
     if (unitTestFiles.isNotEmpty) {
       await _runTestBatch(
         testFiles: unitTestFiles,
         browserEnvironment: browserEnvironment,
         concurrency: _testConcurrency,
         expectFailure: false,
         isDebug: isDebug,
         doUpdateScreenshotGoldens: doUpdateScreenshotGoldens,
       );
       _checkExitCode('Unit tests');
     }

     // Run screenshot tests one at a time to prevent tests from screenshotting
     // each other.
     if (screenshotTestFiles.isNotEmpty) {
       await _runTestBatch(
         testFiles: screenshotTestFiles,
         browserEnvironment: browserEnvironment,
         concurrency: 1,
         expectFailure: false,
         isDebug: isDebug,
         doUpdateScreenshotGoldens: doUpdateScreenshotGoldens,
       );
       _checkExitCode('Golden tests');
     }

     if (!allShardsPassed) {
       throw ToolExit(_createFailedShardsMessage());
     }
   }

   void _checkExitCode(String shard) {
     if (io.exitCode != 0) {
       failedShards.add(shard);
     }
   }

   String _createFailedShardsMessage() {
     final StringBuffer message = StringBuffer(
       'The following test shards failed:\n',
     );
     for (final String failedShard in failedShards) {
       message.writeln(' - $failedShard');
     }
     return message.toString();
   }
 }

 Future<void> _prepareTestResultsDirectory() async {
   if (environment.webUiTestResultsDirectory.existsSync()) {
     environment.webUiTestResultsDirectory.deleteSync(recursive: true);
   }
   environment.webUiTestResultsDirectory.createSync(recursive: true);
 }

 const List<String> _kTestFonts = <String>[
   'ahem.ttf',
   'Roboto-Regular.ttf',
   'NotoNaskhArabic-Regular.ttf',
   'NotoColorEmoji.ttf',
 ];

 void _copyTestFontsIntoWebUi() {
   final String fontsPath = pathlib.join(
     environment.flutterDirectory.path,
     'third_party',
     'txt',
     'third_party',
     'fonts',
   );

   for (final String fontFile in _kTestFonts) {
     final io.File sourceTtf = io.File(pathlib.join(fontsPath, fontFile));
     final String destinationTtfPath =
         pathlib.join(environment.webUiRootDir.path, 'lib', 'assets', fontFile);
     sourceTtf.copySync(destinationTtfPath);
   }
 }

 /// Runs a batch of tests.
 ///
 /// Unless [expectFailure] is set to false, sets [io.exitCode] to a non-zero
 /// value if any tests fail.
 Future<void> _runTestBatch({
   required List<FilePath> testFiles,
   required bool isDebug,
   required BrowserEnvironment browserEnvironment,
   required bool doUpdateScreenshotGoldens,
   required int concurrency,
   required bool expectFailure,
 }) async {
   final String configurationFilePath = pathlib.join(
     environment.webUiRootDir.path,
     browserEnvironment.packageTestConfigurationYamlFile,
   );
   final List<String> testArgs = <String>[
     ...<String>['-r', 'compact'],
     '--concurrency=$concurrency',
     if (isDebug) '--pause-after-load',
     // Don't pollute logs with output from tests that are expected to fail.
     if (expectFailure)
       '--reporter=name-only',
     '--platform=${browserEnvironment.packageTestRuntime.identifier}',
     '--precompiled=${environment.webUiBuildDir.path}',
     '--configuration=$configurationFilePath',
     '--',
     ...testFiles.map((FilePath f) => f.relativeToWebUi).toList(),
   ];

   if (expectFailure) {
     hack.registerReporter(
       'name-only',
       hack.ReporterDetails(
       'Prints the name of the test, but suppresses all other test output.',
       (_, hack.Engine engine, __) => NameOnlyReporter(engine)),
     );
   }

   hack.registerPlatformPlugin(<hack.Runtime>[
     browserEnvironment.packageTestRuntime,
   ], () {
     return BrowserPlatform.start(
       browserEnvironment: browserEnvironment,
       // It doesn't make sense to update a screenshot for a test that is
       // expected to fail.
       doUpdateScreenshotGoldens: !expectFailure && doUpdateScreenshotGoldens,
     );
   });

   // We want to run tests with `web_ui` as a working directory.
   final dynamic originalCwd = io.Directory.current;
   io.Directory.current = environment.webUiRootDir.path;
   try {
     await test.main(testArgs);
   } finally {
     io.Directory.current = originalCwd;
   }

   if (expectFailure) {
     if (io.exitCode != 0) {
       // It failed, as expected.
       print('Test successfully failed, as expected.');
       io.exitCode = 0;
     } else {
       io.stderr.writeln(
         'Tests ${testFiles.join(', ')} did not fail. Expected failure.',
       );
       io.exitCode = 1;
     }
   }
 }

 /// Prints the name of the test, but suppresses all other test output.
 ///
 /// This is useful to prevent pollution of logs by tests that are expected to
 /// fail.
 class NameOnlyReporter implements hack.Reporter {
   NameOnlyReporter(hack.Engine testEngine) {
     testEngine.onTestStarted.listen(_printTestName);
   }

   void _printTestName(hack.LiveTest test) {
     print('Running ${test.groups.map((hack.Group group) => group.name).join(' ')} ${test.individualName}');
   }

   @override
   void pause() {}

   @override
   void resume() {}
 }
	// Copyright 2013 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:io' as io;

	import 'package:path/path.dart' as pathlib;
	// TODO(yjbanov): remove hacks when this is fixed:
	// https://github.com/dart-lang/test/issues/1521
	import 'package:test_api/src/backend/group.dart' as hack;
	import 'package:test_api/src/backend/live_test.dart' as hack;
	import 'package:test_api/src/backend/runtime.dart' as hack;
	import 'package:test_core/src/executable.dart' as test;
	import 'package:test_core/src/runner/configuration/reporters.dart' as hack;
	import 'package:test_core/src/runner/engine.dart' as hack;
	import 'package:test_core/src/runner/hack_register_platform.dart' as hack;
	import 'package:test_core/src/runner/reporter.dart' as hack;

	import '../browser.dart';
	import '../environment.dart';
	import '../exceptions.dart';
	import '../pipeline.dart';
	import '../test_platform.dart';
	import '../utils.dart';

	// Maximum number of tests that run concurrently.
	const int _testConcurrency = int.fromEnvironment('FELT_TEST_CONCURRENCY', defaultValue: 10);

	/// Runs web tests.
	///
	/// Assumes the artifacts from [CompileTestsStep] are available, either from
	/// running it prior to this step locally, or by having the build graph copy
	/// them from another bot.
	class RunTestsStep implements PipelineStep {
	RunTestsStep({
	required this.browserEnvironment,
	required this.isDebug,
	required this.doUpdateScreenshotGoldens,
	this.testFiles,
	});

	final BrowserEnvironment browserEnvironment;
	final List<FilePath>? testFiles;
	final bool isDebug;
	final bool doUpdateScreenshotGoldens;

	/// Global list of shards that failed.
	///
	/// This is used to make sure that when there's a test failure anywhere we
	/// exit with a non-zero exit code.
	///
	/// Shards must never be removed from this list, only added.
	List<String> failedShards = <String>[];

	/// Whether all test shards succeeded.
	bool get allShardsPassed => failedShards.isEmpty;

	@override
	String get description => 'run_tests';

	@override
	bool get isSafeToInterrupt => true;

	@override
	Future<void> interrupt() async {}

	@override
	Future<void> run() async {
	_copyTestFontsIntoWebUi();
	await _prepareTestResultsDirectory();
	await browserEnvironment.prepareEnvironment();

	final List<FilePath> testFiles = this.testFiles ?? findAllTests();

	// Separate screenshot tests from unit-tests. Screenshot tests must run
	// one at a time. Otherwise, they will end up screenshotting each other.
	// This is not an issue for unit-tests.
	final FilePath failureSmokeTestPath = FilePath.fromWebUi(
	'test/golden_tests/golden_failure_smoke_test.dart',
	);
	final List<FilePath> screenshotTestFiles = <FilePath>[];
	final List<FilePath> unitTestFiles = <FilePath>[];

	for (final FilePath testFilePath in testFiles) {
	if (!testFilePath.absolute.endsWith('_test.dart')) {
	// Not a test file at all. Skip.
	continue;
	}
	if (testFilePath == failureSmokeTestPath) {
	// A smoke test that fails on purpose. Skip.
	continue;
	}

	// All files under test/golden_tests are considered golden tests.
	final bool isUnderGoldenTestsDirectory =
	pathlib.split(testFilePath.relativeToWebUi).contains('golden_tests');
	// Any file whose name ends with "_golden_test.dart" is run as a golden test.
	final bool isGoldenTestFile = pathlib
	.basename(testFilePath.relativeToWebUi)
	.endsWith('_golden_test.dart');
	if (isUnderGoldenTestsDirectory \|\| isGoldenTestFile) {
	screenshotTestFiles.add(testFilePath);
	} else {
	unitTestFiles.add(testFilePath);
	}
	}

	// This test returns a non-zero exit code on purpose. Run it separately.
	if (testFiles.contains(failureSmokeTestPath)) {
	await _runTestBatch(
	testFiles: <FilePath>[failureSmokeTestPath],
	browserEnvironment: browserEnvironment,
	concurrency: 1,
	expectFailure: true,
	isDebug: isDebug,
	doUpdateScreenshotGoldens: doUpdateScreenshotGoldens,
	);
	}

	// Run non-screenshot tests with high concurrency.
	if (unitTestFiles.isNotEmpty) {
	await _runTestBatch(
	testFiles: unitTestFiles,
	browserEnvironment: browserEnvironment,
	concurrency: _testConcurrency,
	expectFailure: false,
	isDebug: isDebug,
	doUpdateScreenshotGoldens: doUpdateScreenshotGoldens,
	);
	_checkExitCode('Unit tests');
	}

	// Run screenshot tests one at a time to prevent tests from screenshotting
	// each other.
	if (screenshotTestFiles.isNotEmpty) {
	await _runTestBatch(
	testFiles: screenshotTestFiles,
	browserEnvironment: browserEnvironment,
	concurrency: 1,
	expectFailure: false,
	isDebug: isDebug,
	doUpdateScreenshotGoldens: doUpdateScreenshotGoldens,
	);
	_checkExitCode('Golden tests');
	}

	if (!allShardsPassed) {
	throw ToolExit(_createFailedShardsMessage());
	}
	}

	void _checkExitCode(String shard) {
	if (io.exitCode != 0) {
	failedShards.add(shard);
	}
	}

	String _createFailedShardsMessage() {
	final StringBuffer message = StringBuffer(
	'The following test shards failed:\n',
	);
	for (final String failedShard in failedShards) {
	message.writeln(' - $failedShard');
	}
	return message.toString();
	}
	}

	Future<void> _prepareTestResultsDirectory() async {
	if (environment.webUiTestResultsDirectory.existsSync()) {
	environment.webUiTestResultsDirectory.deleteSync(recursive: true);
	}
	environment.webUiTestResultsDirectory.createSync(recursive: true);
	}

	const List<String> _kTestFonts = <String>[
	'ahem.ttf',
	'Roboto-Regular.ttf',
	'NotoNaskhArabic-Regular.ttf',
	'NotoColorEmoji.ttf',
	];

	void _copyTestFontsIntoWebUi() {
	final String fontsPath = pathlib.join(
	environment.flutterDirectory.path,
	'third_party',
	'txt',
	'third_party',
	'fonts',
	);

	for (final String fontFile in _kTestFonts) {
	final io.File sourceTtf = io.File(pathlib.join(fontsPath, fontFile));
	final String destinationTtfPath =
	pathlib.join(environment.webUiRootDir.path, 'lib', 'assets', fontFile);
	sourceTtf.copySync(destinationTtfPath);
	}
	}

	/// Runs a batch of tests.
	///
	/// Unless [expectFailure] is set to false, sets [io.exitCode] to a non-zero
	/// value if any tests fail.
	Future<void> _runTestBatch({
	required List<FilePath> testFiles,
	required bool isDebug,
	required BrowserEnvironment browserEnvironment,
	required bool doUpdateScreenshotGoldens,
	required int concurrency,
	required bool expectFailure,
	}) async {
	final String configurationFilePath = pathlib.join(
	environment.webUiRootDir.path,
	browserEnvironment.packageTestConfigurationYamlFile,
	);
	final List<String> testArgs = <String>[
	...<String>['-r', 'compact'],
	'--concurrency=$concurrency',
	if (isDebug) '--pause-after-load',
	// Don't pollute logs with output from tests that are expected to fail.
	if (expectFailure)
	'--reporter=name-only',
	'--platform=${browserEnvironment.packageTestRuntime.identifier}',
	'--precompiled=${environment.webUiBuildDir.path}',
	'--configuration=$configurationFilePath',
	'--',
	...testFiles.map((FilePath f) => f.relativeToWebUi).toList(),
	];

	if (expectFailure) {
	hack.registerReporter(
	'name-only',
	hack.ReporterDetails(
	'Prints the name of the test, but suppresses all other test output.',
	(_, hack.Engine engine, __) => NameOnlyReporter(engine)),
	);
	}

	hack.registerPlatformPlugin(<hack.Runtime>[
	browserEnvironment.packageTestRuntime,
	], () {
	return BrowserPlatform.start(
	browserEnvironment: browserEnvironment,
	// It doesn't make sense to update a screenshot for a test that is
	// expected to fail.
	doUpdateScreenshotGoldens: !expectFailure && doUpdateScreenshotGoldens,
	);
	});

	// We want to run tests with `web_ui` as a working directory.
	final dynamic originalCwd = io.Directory.current;
	io.Directory.current = environment.webUiRootDir.path;
	try {
	await test.main(testArgs);
	} finally {
	io.Directory.current = originalCwd;
	}

	if (expectFailure) {
	if (io.exitCode != 0) {
	// It failed, as expected.
	print('Test successfully failed, as expected.');
	io.exitCode = 0;
	} else {
	io.stderr.writeln(
	'Tests ${testFiles.join(', ')} did not fail. Expected failure.',
	);
	io.exitCode = 1;
	}
	}
	}

	/// Prints the name of the test, but suppresses all other test output.
	///
	/// This is useful to prevent pollution of logs by tests that are expected to
	/// fail.
	class NameOnlyReporter implements hack.Reporter {
	NameOnlyReporter(hack.Engine testEngine) {
	testEngine.onTestStarted.listen(_printTestName);
	}

	void _printTestName(hack.LiveTest test) {
	print('Running ${test.groups.map((hack.Group group) => group.name).join(' ')} ${test.individualName}');
	}

	@override
	void pause() {}

	@override
	void resume() {}
	}