Fix flutter test in workspace (#153919)

Follow-up to #153754.

packages/flutter_tools/lib/src/build_system/targets/common.dart

@@ -133,7 +133,7 @@ class KernelSnapshotProgram extends Target {
 
   @override
   List<Source> get inputs => const <Source>[
-    Source.pattern('{PROJECT_DIR}/.dart_tool/package_config_subset'),
+    Source.pattern('{WORKSPACE_DIR}/.dart_tool/package_config_subset'),
     Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/common.dart'),
     Source.artifact(Artifact.platformKernelDill),
     Source.artifact(Artifact.engineDartBinary),

packages/flutter_tools/lib/src/commands/test.dart

@@ -425,6 +425,7 @@ class TestCommand extends FlutterCommand with DeviceBasedDevelopmentArtifacts {
         flavor: buildInfo.flavor,
         impellerStatus: debuggingOptions.enableImpeller,
         buildMode: debuggingOptions.buildInfo.mode,
+        packageConfigPath: buildInfo.packageConfigPath,
       );
       testAssetDirectory = globals.fs.path.
         join(flutterProject.directory.path, 'build', 'unit_test_assets');
@@ -691,12 +692,11 @@ class TestCommand extends FlutterCommand with DeviceBasedDevelopmentArtifacts {
     required String? flavor,
     required ImpellerStatus impellerStatus,
     required BuildMode buildMode,
+    required String packageConfigPath,
   }) async {
     final AssetBundle assetBundle = AssetBundleFactory.instance.createBundle();
-    // TODO(sigurdm): parametrize packageConfigPath to support testing
-    // workspaces.
     final int build = await assetBundle.build(
-      packageConfigPath: '.dart_tool/package_config.json',
+      packageConfigPath: packageConfigPath,
       flavor: flavor,
     );
     if (build != 0) {

packages/flutter_tools/lib/src/isolated/native_assets/native_assets.dart

@@ -138,16 +138,14 @@ class NativeAssetsBuildRunnerImpl implements NativeAssetsBuildRunner {
 
   @override
   Future<bool> hasPackageConfig() {
-    final File packageConfigJson =
+    return fileSystem.file(packageConfigPath).exists();
-        fileSystem.directory(projectUri.toFilePath()).childDirectory('.dart_tool').childFile('package_config.json');
-    return packageConfigJson.exists();
   }
 
   @override
   Future<List<Package>> packagesWithNativeAssets() async {
     final PackageLayout packageLayout = PackageLayout.fromPackageConfig(
       packageConfig,
-      projectUri.resolve('.dart_tool/package_config.json'),
+      Uri.file(packageConfigPath),
     );
     // It suffices to only check for build hooks. If no packages have a build
     // hook. Then no build hook will output any assets for any link hook, and
@@ -164,7 +162,7 @@ class NativeAssetsBuildRunnerImpl implements NativeAssetsBuildRunner {
   }) {
     final PackageLayout packageLayout = PackageLayout.fromPackageConfig(
       packageConfig,
-      projectUri.resolve('.dart_tool/package_config.json'),
+      Uri.file(packageConfigPath),
     );
     return _buildRunner.buildDryRun(
       includeParentEnvironment: includeParentEnvironment,
@@ -192,7 +190,7 @@ class NativeAssetsBuildRunnerImpl implements NativeAssetsBuildRunner {
   }) {
     final PackageLayout packageLayout = PackageLayout.fromPackageConfig(
       packageConfig,
-      projectUri.resolve('.dart_tool/package_config.json'),
+      Uri.file(packageConfigPath),
     );
     return _buildRunner.build(
       buildMode: buildMode,
@@ -221,7 +219,7 @@ class NativeAssetsBuildRunnerImpl implements NativeAssetsBuildRunner {
   }) {
     final PackageLayout packageLayout = PackageLayout.fromPackageConfig(
       packageConfig,
-      projectUri.resolve('.dart_tool/package_config.json'),
+      Uri.file(packageConfigPath),
     );
     return _buildRunner.linkDryRun(
       includeParentEnvironment: includeParentEnvironment,
@@ -249,7 +247,7 @@ class NativeAssetsBuildRunnerImpl implements NativeAssetsBuildRunner {
   }) {
     final PackageLayout packageLayout = PackageLayout.fromPackageConfig(
       packageConfig,
-      projectUri.resolve('.dart_tool/package_config.json'),
+      Uri.file(packageConfigPath),
     );
     return _buildRunner.link(
       buildMode: buildMode,

packages/flutter_tools/test/commands.shard/hermetic/test_test.dart

@@ -112,10 +112,11 @@ void main() {
     (package.childDirectory('.dart_tool')
         .childFile('package_config.json')
       ..createSync(recursive: true))
-        .writeAsString(_packageConfigContents);
+        .writeAsStringSync(_packageConfigContents);
     package.childDirectory('test').childFile('some_test.dart').createSync(recursive: true);
     package.childDirectory('integration_test').childFile('some_integration_test.dart').createSync(recursive: true);
 
+
     final File flutterToolsPackageConfigFile = fs.directory(
       fs.path.join(
         getFlutterRoot(),
@@ -1430,6 +1431,53 @@ dev_dependencies:
       ProcessManager: () => FakeProcessManager.any(),
     });
   });
+
+  testUsingContext('Can test in a pub workspace',
+      () async {
+    final String root = fs.path.rootPrefix(fs.currentDirectory.absolute.path);
+    final Directory package = fs.directory('${root}package').absolute;
+    package.childFile('pubspec.yaml').createSync(recursive: true);
+    package.childFile('pubspec.yaml').writeAsStringSync('''
+workspace:
+  - app/
+''');
+
+    final Directory app = package.childDirectory('app');
+    app.createSync();
+    app.childFile('pubspec.yaml').writeAsStringSync('''
+$_pubspecContents
+resolution: workspace
+''');
+    app.childDirectory('test').childFile('some_test.dart').createSync(recursive: true);
+    app.childDirectory('integration_test').childFile('some_integration_test.dart').createSync(recursive: true);
+
+    fs.currentDirectory = app;
+
+    final FakeFlutterTestRunner testRunner = FakeFlutterTestRunner(0);
+    final FakePackageTest fakePackageTest = FakePackageTest();
+    final TestCommand testCommand = TestCommand(
+      testWrapper: fakePackageTest,
+      testRunner: testRunner,
+    );
+    final CommandRunner<void> commandRunner =
+    createTestCommandRunner(testCommand);
+
+    await commandRunner.run(const <String>[
+      'test',
+      '--no-pub',
+    ]);
+    expect(
+      testRunner.lastDebuggingOptionsValue.buildInfo.packageConfigPath,
+      package
+        .childDirectory('.dart_tool')
+        .childFile('package_config.json')
+        .path,
+    );
+  }, overrides: <Type, Generator>{
+    FileSystem: () => fs,
+    ProcessManager: () => FakeProcessManager.any(),
+    Logger: () => logger,
+  });
 }
 
 class FakeFlutterTestRunner implements FlutterTestRunner {