Reland: More verification on flutter build web, add tests and cleanup (#34173)

packages/flutter_tools/lib/src/application_package.dart

@@ -57,6 +57,9 @@ class ApplicationPackageFactory {
             ? MacOSApp.fromMacOSProject(FlutterProject.current().macos)
             : MacOSApp.fromPrebuiltApp(applicationBinary);
       case TargetPlatform.web_javascript:
+        if (!FlutterProject.current().web.existsSync()) {
+          return null;
+        }
         return WebApplicationPackage(FlutterProject.current());
       case TargetPlatform.linux_x64:
         return applicationBinary == null

packages/flutter_tools/lib/src/project.dart

@@ -580,11 +580,14 @@ class WebProject {
 
   /// Whether this flutter project has a web sub-project.
   bool existsSync() {
-    return parent.directory.childDirectory('web').existsSync();
+    return parent.directory.childDirectory('web').existsSync()
+      && indexFile.existsSync();
   }
 
   /// The html file used to host the flutter web application.
-  File get indexFile => parent.directory.childDirectory('web').childFile('index.html');
+  File get indexFile => parent.directory
+      .childDirectory('web')
+      .childFile('index.html');
 
   Future<void> ensureReadyForPlatformSpecificTooling() async {}
 }

packages/flutter_tools/lib/src/resident_web_runner.dart

@@ -7,6 +7,7 @@ import 'dart:async';
 import 'package:meta/meta.dart';
 import 'package:webkit_inspection_protocol/webkit_inspection_protocol.dart';
 
+import 'application_package.dart';
 import 'asset.dart';
 import 'base/common.dart';
 import 'base/file_system.dart';
@@ -112,7 +113,14 @@ class ResidentWebRunner extends ResidentRunner {
     String route,
     bool shouldBuild = true,
   }) async {
-    final FlutterProject currentProject = FlutterProject.current();
+    final ApplicationPackage package = await ApplicationPackageFactory.instance.getPackageForPlatform(
+      TargetPlatform.web_javascript,
+      applicationBinary: null,
+    );
+    if (package == null) {
+      printError('No application found for TargetPlatform.web_javascript');
+      return 1;
+    }
     if (!fs.isFileSync(mainPath)) {
       String message = 'Tried to run $mainPath, but that file does not exist.';
       if (target == null) {
@@ -124,7 +132,7 @@ class ResidentWebRunner extends ResidentRunner {
     }
     // Start the web compiler and build the assets.
     await webCompilationProxy.initialize(
-      projectDirectory: currentProject.directory,
+      projectDirectory: FlutterProject.current().directory,
       targets: <String>[target],
     );
     _lastCompiled = DateTime.now();

packages/flutter_tools/lib/src/web/compile.dart

@@ -19,6 +19,9 @@ import '../usage.dart';
 WebCompilationProxy get webCompilationProxy => context.get<WebCompilationProxy>();
 
 Future<void> buildWeb(FlutterProject flutterProject, String target, BuildInfo buildInfo) async {
+  if (!flutterProject.web.existsSync()) {
+    throwToolExit('Missing index.html.');
+  }
   final Status status = logger.startProgress('Compiling $target for the Web...', timeout: null);
   final Stopwatch sw = Stopwatch()..start();
   final Directory outputDir = fs.directory(getWebBuildDirectory())

packages/flutter_tools/test/commands/build_linux_test.dart

@@ -19,12 +19,20 @@ import '../src/context.dart';
 import '../src/mocks.dart';
 
 void main() {
+  MockProcessManager mockProcessManager;
+  MockProcess mockProcess;
+  MockPlatform linuxPlatform;
+  MockPlatform notLinuxPlatform;
+
+  setUpAll(() {
     Cache.disableLocking();
-  final MockProcessManager mockProcessManager = MockProcessManager();
-  final MockProcess mockProcess = MockProcess();
-  final MockPlatform linuxPlatform = MockPlatform();
-  final MockPlatform notLinuxPlatform = MockPlatform();
+  });
 
+  setUp(() {
+    mockProcessManager = MockProcessManager();
+    mockProcess = MockProcess();
+    linuxPlatform = MockPlatform();
+    notLinuxPlatform = MockPlatform();
     when(mockProcess.exitCode).thenAnswer((Invocation invocation) async {
       return 0;
     });
@@ -36,6 +44,7 @@ void main() {
     });
     when(linuxPlatform.isLinux).thenReturn(true);
     when(notLinuxPlatform.isLinux).thenReturn(false);
+  });
 
   testUsingContext('Linux build fails when there is no linux project', () async {
     final BuildCommand command = BuildCommand();

packages/flutter_tools/test/commands/build_macos_test.dart

@@ -19,13 +19,22 @@ import '../src/context.dart';
 import '../src/mocks.dart';
 
 void main() {
+  MockProcessManager mockProcessManager;
+  MemoryFileSystem memoryFilesystem;
+  MockProcess mockProcess;
+  MockPlatform macosPlatform;
+  MockPlatform notMacosPlatform;
+
+  setUpAll(() {
     Cache.disableLocking();
-  final MockProcessManager mockProcessManager = MockProcessManager();
-  final MemoryFileSystem memoryFilesystem = MemoryFileSystem();
-  final MockProcess mockProcess = MockProcess();
-  final MockPlatform macosPlatform = MockPlatform();
-  final MockPlatform notMacosPlatform = MockPlatform();
+  });
 
+  setUp(() {
+    mockProcessManager = MockProcessManager();
+    memoryFilesystem = MemoryFileSystem();
+    mockProcess = MockProcess();
+    macosPlatform = MockPlatform();
+    notMacosPlatform = MockPlatform();
     when(mockProcess.exitCode).thenAnswer((Invocation invocation) async {
     return 0;
     });
@@ -37,6 +46,7 @@ void main() {
     });
     when(macosPlatform.isMacOS).thenReturn(true);
     when(notMacosPlatform.isMacOS).thenReturn(false);
+  });
 
   testUsingContext('macOS build fails when there is no macos project', () async {
     final BuildCommand command = BuildCommand();

packages/flutter_tools/test/commands/build_web_test.dart

+// Copyright 2019 The Chromium 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 'package:flutter_tools/src/base/common.dart';
+import 'package:flutter_tools/src/base/file_system.dart';
+import 'package:flutter_tools/src/base/platform.dart';
+import 'package:flutter_tools/src/build_info.dart';
+import 'package:flutter_tools/src/cache.dart';
+import 'package:flutter_tools/src/device.dart';
+import 'package:flutter_tools/src/project.dart';
+import 'package:flutter_tools/src/resident_runner.dart';
+import 'package:flutter_tools/src/resident_web_runner.dart';
+import 'package:flutter_tools/src/version.dart';
+import 'package:flutter_tools/src/web/compile.dart';
+import 'package:mockito/mockito.dart';
+
+import '../src/common.dart';
+import '../src/testbed.dart';
+
+void main() {
+  MockWebCompilationProxy mockWebCompilationProxy;
+  Testbed testbed;
+  MockPlatform mockPlatform;
+
+  setUpAll(() {
+    Cache.disableLocking();
+  });
+
+  setUp(() {
+    mockWebCompilationProxy = MockWebCompilationProxy();
+    testbed = Testbed(setup: () {
+      fs.file('pubspec.yaml')
+        ..createSync()
+        ..writeAsStringSync('name: foo\n');
+      fs.file('.packages').createSync();
+      fs.file(fs.path.join('web', 'index.html')).createSync(recursive: true);
+      fs.file(fs.path.join('lib', 'main.dart')).createSync(recursive: true);
+      when(mockWebCompilationProxy.initialize(
+        projectDirectory: anyNamed('projectDirectory'),
+        targets: anyNamed('targets'),
+        release: anyNamed('release')
+      )).thenAnswer((Invocation invocation) {
+        final String path = fs.path.join('.dart_tool', 'build', 'flutter_web', 'foo', 'lib', 'main_web_entrypoint.dart.js');
+        fs.file(path).createSync(recursive: true);
+        fs.file('$path.map').createSync();
+        return Future<bool>.value(true);
+      });
+    }, overrides: <Type, Generator>{
+      WebCompilationProxy: () => mockWebCompilationProxy,
+      Platform: () => mockPlatform,
+      FlutterVersion: () => MockFlutterVersion(),
+    });
+  });
+
+  test('Refuses to build for web when missing index.html', () => testbed.run(() async {
+    fs.file(fs.path.join('web', 'index.html')).deleteSync();
+
+    expect(buildWeb(
+      FlutterProject.current(),
+      fs.path.join('lib', 'main.dart'),
+      BuildInfo.debug,
+    ), throwsA(isInstanceOf<ToolExit>()));
+  }));
+
+  test('Refuses to build using runner when missing index.html', () => testbed.run(() async {
+    fs.file(fs.path.join('web', 'index.html')).deleteSync();
+
+    final ResidentWebRunner runner = ResidentWebRunner(
+      <FlutterDevice>[],
+      flutterProject: FlutterProject.current(),
+      ipv6: false,
+      debuggingOptions: DebuggingOptions.enabled(BuildInfo.debug),
+    );
+    expect(await runner.run(), 1);
+  }));
+
+  test('Can build for web', () => testbed.run(() async {
+
+    await buildWeb(
+      FlutterProject.current(),
+      fs.path.join('lib', 'main.dart'),
+      BuildInfo.debug,
+    );
+  }));
+}
+
+class MockWebCompilationProxy extends Mock implements WebCompilationProxy {}
+class MockPlatform extends Mock implements Platform {
+  @override
+  Map<String, String> environment = <String, String>{
+    'FLUTTER_ROOT': '/',
+  };
+}
+class MockFlutterVersion extends Mock implements FlutterVersion {
+  @override
+  bool get isStable => false;
+}

packages/flutter_tools/test/commands/build_windows_test.dart

@@ -19,18 +19,28 @@ import '../src/context.dart';
 import '../src/mocks.dart';
 
 void main() {
-  Cache.disableLocking();
-  final MockProcessManager mockProcessManager = MockProcessManager();
-  final MemoryFileSystem memoryFilesystem = MemoryFileSystem(style: FileSystemStyle.windows);
-  final MockProcess mockProcess = MockProcess();
-  final MockPlatform windowsPlatform = MockPlatform()
-      ..environment['PROGRAMFILES(X86)'] = r'C:\Program Files (x86)\';
-  final MockPlatform notWindowsPlatform = MockPlatform();
-  final MockVisualStudio mockVisualStudio = MockVisualStudio();
+  MockProcessManager mockProcessManager;
+  MemoryFileSystem memoryFilesystem;
+  MockProcess mockProcess;
+  MockPlatform windowsPlatform;
+  MockPlatform notWindowsPlatform;
+  MockVisualStudio mockVisualStudio;
   const String solutionPath = r'C:\windows\Runner.sln';
   const String visualStudioPath = r'C:\Program Files (x86)\Microsoft Visual Studio\2017\Community';
   const String vcvarsPath = visualStudioPath + r'\VC\Auxiliary\Build\vcvars64.bat';
 
+  setUpAll(() {
+    Cache.disableLocking();
+  });
+
+  setUp(() {
+    mockProcessManager = MockProcessManager();
+    memoryFilesystem = MemoryFileSystem(style: FileSystemStyle.windows);
+    mockProcess = MockProcess();
+    windowsPlatform = MockPlatform()
+        ..environment['PROGRAMFILES(X86)'] = r'C:\Program Files (x86)\';
+    notWindowsPlatform = MockPlatform();
+    mockVisualStudio = MockVisualStudio();
     when(mockProcess.exitCode).thenAnswer((Invocation invocation) async {
       return 0;
     });
@@ -42,6 +52,7 @@ void main() {
     });
     when(windowsPlatform.isWindows).thenReturn(true);
     when(notWindowsPlatform.isWindows).thenReturn(false);
+  });
 
   testUsingContext('Windows build fails when there is no vcvars64.bat', () async {
     final BuildCommand command = BuildCommand();

packages/flutter_tools/test/src/testbed.dart

@@ -11,6 +11,7 @@ import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/terminal.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/context_runner.dart';
+import 'package:flutter_tools/src/usage.dart';
 
 import 'context.dart';
 
@@ -24,6 +25,7 @@ final Map<Type, Generator> _testbedDefaults = <Type, Generator>{
   FileSystem: () => MemoryFileSystem(), // Keeps tests fast by avoid actual file system.
   Logger: () => BufferLogger(), // Allows reading logs and prevents stdout.
   OutputPreferences: () => OutputPreferences(showColor: false), // configures BufferLogger to avoid color codes.
+  Usage: () => NoOpUsage(), // prevent addition of analytics from burdening test mocks
 };
 
 /// Manages interaction with the tool injection and runner system.
@@ -60,7 +62,7 @@ class Testbed {
   /// `overrides` provides more overrides in addition to the test defaults.
   /// `setup` may be provided to apply mocks within the tool managed zone,
   /// including any specified overrides.
-  Testbed({Future<void> Function() setup, Map<Type, Generator> overrides})
+  Testbed({FutureOr<void> Function() setup, Map<Type, Generator> overrides})
     : _setup = setup,
       _overrides = overrides;
 
@@ -101,3 +103,41 @@ class Testbed {
     });
   }
 }
+
+/// A no-op implementation of [Usage] for testing.
+class NoOpUsage implements Usage {
+  @override
+  bool enabled = false;
+
+  @override
+  bool suppressAnalytics = true;
+
+  @override
+  String get clientId => 'test';
+
+  @override
+  Future<void> ensureAnalyticsSent() {
+    return null;
+  }
+
+  @override
+  bool get isFirstRun => false;
+
+  @override
+  Stream<Map<String, Object>> get onSend => const Stream<Object>.empty();
+
+  @override
+  void printWelcome() {}
+
+  @override
+  void sendCommand(String command, {Map<String, String> parameters}) {}
+
+  @override
+  void sendEvent(String category, String parameter, {Map<String, String> parameters}) {}
+
+  @override
+  void sendException(dynamic exception, StackTrace trace) {}
+
+  @override
+  void sendTiming(String category, String variableName, Duration duration, {String label}) {}
+}
\ No newline at end of file