[flutter_tools] fix test asset loading (#103667)

dev/automated_tests/flutter_test/package_assets_test.dart

@@ -13,7 +13,6 @@ void main() {
         width: 54,
         height: 54,
         fit: BoxFit.none,
-        package: 'flutter_automated_tests',
       ),
     );
   });

dev/automated_tests/pubspec.yaml

@@ -70,6 +70,6 @@ dependencies:
 flutter:
   uses-material-design: true
   assets:
-  - icon/
+    - icon/test.png
 
 # PUBSPEC CHECKSUM: 53c0

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

@@ -320,8 +320,11 @@ class TestCommand extends FlutterCommand with DeviceBasedDevelopmentArtifacts {
       );
     }
 
+    String testAssetDirectory;
     if (buildTestAssets) {
       await _buildTestAsset();
+      testAssetDirectory = globals.fs.path.
+        join(flutterProject?.directory?.path ?? '', 'build', 'unit_test_assets');
     }
 
     final bool startPaused = boolArgDeprecated('start-paused');
@@ -444,7 +447,7 @@ class TestCommand extends FlutterCommand with DeviceBasedDevelopmentArtifacts {
       machine: machine,
       updateGoldens: boolArgDeprecated('update-goldens'),
       concurrency: jobs,
-      buildTestAssets: buildTestAssets,
+      testAssetDirectory: testAssetDirectory,
       flutterProject: flutterProject,
       web: stringArgDeprecated('platform') == 'chrome',
       randomSeed: stringArgDeprecated('test-randomize-ordering-seed'),

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

@@ -55,7 +55,7 @@ FlutterPlatform installHook({
   String precompiledDillPath,
   Map<String, String> precompiledDillFiles,
   bool updateGoldens = false,
-  bool buildTestAssets = false,
+  String testAssetDirectory,
   InternetAddressType serverType = InternetAddressType.IPv4,
   Uri projectRootDirectory,
   FlutterProject flutterProject,
@@ -86,7 +86,7 @@ FlutterPlatform installHook({
     precompiledDillPath: precompiledDillPath,
     precompiledDillFiles: precompiledDillFiles,
     updateGoldens: updateGoldens,
-    buildTestAssets: buildTestAssets,
+    testAssetDirectory: testAssetDirectory,
     projectRootDirectory: projectRootDirectory,
     flutterProject: flutterProject,
     icudtlPath: icudtlPath,
@@ -280,7 +280,7 @@ class FlutterPlatform extends PlatformPlugin {
     this.precompiledDillPath,
     this.precompiledDillFiles,
     this.updateGoldens,
-    this.buildTestAssets,
+    this.testAssetDirectory,
     this.projectRootDirectory,
     this.flutterProject,
     this.icudtlPath,
@@ -297,7 +297,7 @@ class FlutterPlatform extends PlatformPlugin {
   final String precompiledDillPath;
   final Map<String, String> precompiledDillFiles;
   final bool updateGoldens;
-  final bool buildTestAssets;
+  final String testAssetDirectory;
   final Uri projectRootDirectory;
   final FlutterProject flutterProject;
   final String icudtlPath;
@@ -419,7 +419,7 @@ class FlutterPlatform extends PlatformPlugin {
       machine: machine,
       debuggingOptions: debuggingOptions,
       host: host,
-      buildTestAssets: buildTestAssets,
+      testAssetDirectory: testAssetDirectory,
       flutterProject: flutterProject,
       icudtlPath: icudtlPath,
       compileExpression: _compileExpressionService,

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

@@ -39,7 +39,7 @@ class FlutterTesterTestDevice extends TestDevice {
     @required this.enableObservatory,
     @required this.machine,
     @required this.host,
-    @required this.buildTestAssets,
+    @required this.testAssetDirectory,
     @required this.flutterProject,
     @required this.icudtlPath,
     @required this.compileExpression,
@@ -66,7 +66,7 @@ class FlutterTesterTestDevice extends TestDevice {
   final bool enableObservatory;
   final bool machine;
   final InternetAddress host;
-  final bool buildTestAssets;
+  final String testAssetDirectory;
   final FlutterProject flutterProject;
   final String icudtlPath;
   final CompileExpression compileExpression;
@@ -93,7 +93,6 @@ class FlutterTesterTestDevice extends TestDevice {
     // Let the server choose an unused port.
     _server = await bind(host, /*port*/ 0);
     logger.printTrace('test $id: test harness socket server is running at port:${_server.port}');
-
     final List<String> command = <String>[
       // Until an arm64 flutter tester binary is available, force to run in Rosetta
       // to avoid "unexpectedly got a signal in sigtramp" crash.
@@ -128,7 +127,10 @@ class FlutterTesterTestDevice extends TestDevice {
       '--enable-dart-profiling',
       '--non-interactive',
       '--use-test-fonts',
+      '--disable-asset-fonts',
       '--packages=${debuggingOptions.buildInfo.packagesPath}',
+      if (testAssetDirectory != null)
+        '--flutter-assets-dir=$testAssetDirectory',
       if (debuggingOptions.nullAssertions)
         '--dart-flags=--null_assertions',
       ...debuggingOptions.dartEntrypointArgs,
@@ -148,8 +150,8 @@ class FlutterTesterTestDevice extends TestDevice {
       'FONTCONFIG_FILE': fontConfigManager.fontConfigFile.path,
       'SERVER_PORT': _server.port.toString(),
       'APP_NAME': flutterProject?.manifest?.appName ?? '',
-      if (buildTestAssets)
-        'UNIT_TEST_ASSETS': fileSystem.path.join(flutterProject?.directory?.path ?? '', 'build', 'unit_test_assets'),
+      if (testAssetDirectory != null)
+        'UNIT_TEST_ASSETS': testAssetDirectory,
     };
 
     logger.printTrace('test $id: Starting flutter_tester process with command=$command, environment=$environment');

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

@@ -42,7 +42,7 @@ abstract class FlutterTestRunner {
     bool updateGoldens = false,
     TestWatcher watcher,
     @required int concurrency,
-    bool buildTestAssets = false,
+    String testAssetDirectory,
     FlutterProject flutterProject,
     String icudtlPath,
     Directory coverageDirectory,
@@ -78,7 +78,7 @@ class _FlutterTestRunnerImpl implements FlutterTestRunner {
     bool updateGoldens = false,
     TestWatcher watcher,
     @required int concurrency,
-    bool buildTestAssets = false,
+    String testAssetDirectory,
     FlutterProject flutterProject,
     String icudtlPath,
     Directory coverageDirectory,
@@ -202,7 +202,7 @@ class _FlutterTestRunnerImpl implements FlutterTestRunner {
       precompiledDillPath: precompiledDillPath,
       precompiledDillFiles: precompiledDillFiles,
       updateGoldens: updateGoldens,
-      buildTestAssets: buildTestAssets,
+      testAssetDirectory: testAssetDirectory,
       projectRootDirectory: globals.fs.currentDirectory.uri,
       flutterProject: flutterProject,
       icudtlPath: icudtlPath,

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

@@ -754,7 +754,7 @@ class FakeFlutterTestRunner implements FlutterTestRunner {
     bool updateGoldens = false,
     TestWatcher watcher,
     int concurrency,
-    bool buildTestAssets = false,
+    String testAssetDirectory,
     FlutterProject flutterProject,
     String icudtlPath,
     Directory coverageDirectory,

packages/flutter_tools/test/general.shard/flutter_platform_test.dart

@@ -95,7 +95,7 @@ void main() {
         precompiledDillPath: 'def',
         precompiledDillFiles: expectedPrecompiledDillFiles,
         updateGoldens: true,
-        buildTestAssets: true,
+        testAssetDirectory: '/build/test',
         serverType: InternetAddressType.IPv6,
         icudtlPath: 'ghi',
         platformPluginRegistration: (FlutterPlatform platform) {
@@ -114,7 +114,7 @@ void main() {
       expect(flutterPlatform.precompiledDillPath, equals('def'));
       expect(flutterPlatform.precompiledDillFiles, expectedPrecompiledDillFiles);
       expect(flutterPlatform.updateGoldens, equals(true));
-      expect(flutterPlatform.buildTestAssets, equals(true));
+      expect(flutterPlatform.testAssetDirectory, '/build/test');
       expect(flutterPlatform.icudtlPath, equals('ghi'));
     });
   });

packages/flutter_tools/test/general.shard/flutter_tester_device_test.dart

@@ -87,6 +87,7 @@ void main() {
         '--enable-dart-profiling',
         '--non-interactive',
         '--use-test-fonts',
+        '--disable-asset-fonts',
         '--packages=.dart_tool/package_config.json',
         'example.dill',
       ], environment: <String, String>{
@@ -131,6 +132,7 @@ void main() {
         '--enable-dart-profiling',
         '--non-interactive',
         '--use-test-fonts',
+        '--disable-asset-fonts',
         '--packages=.dart_tool/package_config.json',
         'example.dill',
       ], environment: <String, String>{
@@ -203,6 +205,7 @@ void main() {
             '--enable-dart-profiling',
             '--non-interactive',
             '--use-test-fonts',
+            '--disable-asset-fonts',
             '--packages=.dart_tool/package_config.json',
             '--foo',
             '--bar',
@@ -244,6 +247,7 @@ void main() {
             '--enable-dart-profiling',
             '--non-interactive',
             '--use-test-fonts',
+            '--disable-asset-fonts',
             '--packages=.dart_tool/package_config.json',
             'example.dill',
           ],
@@ -293,7 +297,7 @@ class TestFlutterTesterDevice extends FlutterTesterTestDevice {
     enableObservatory: enableObservatory,
     machine: false,
     host: InternetAddress.loopbackIPv6,
-    buildTestAssets: false,
+    testAssetDirectory: null,
     flutterProject: null,
     icudtlPath: null,
     compileExpression: null,