[flutter_tools] refactor iOS tests for Device.startApp into new file (#52854)

packages/flutter_tools/lib/src/ios/devices.dart

@@ -383,7 +383,7 @@ class IOSDevice extends Device {
   @override
   DevicePortForwarder get portForwarder => _portForwarder ??= IOSDevicePortForwarder(
     processManager: globals.processManager,
-    logger: globals.logger,
+    logger: _logger,
     dyLdLibEntry: globals.cache.dyLdLibEntry,
     id: id,
     iproxyPath: _iproxyPath,

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

@@ -30,6 +30,7 @@ import 'package:flutter_tools/src/globals.dart' as globals;
 
 import '../../src/common.dart';
 import '../../src/context.dart';
+import '../../src/fakes.dart';
 import '../../src/mocks.dart';
 
 
@@ -54,7 +55,7 @@ void main() {
       const int devicePort = 499;
       const int hostPort = 42;
 
-      MockDeviceLogReader mockLogReader;
+      FakeDeviceLogReader mockLogReader;
       MockPortForwarder portForwarder;
       MockAndroidDevice device;
       MockProcessManager mockProcessManager;
@@ -63,7 +64,7 @@ void main() {
 
       setUp(() {
         mockProcessManager = MockProcessManager();
-        mockLogReader = MockDeviceLogReader();
+        mockLogReader = FakeDeviceLogReader();
         portForwarder = MockPortForwarder();
         device = MockAndroidDevice();
         vmServiceDoneCompleter = Completer<void>();
@@ -374,7 +375,7 @@ void main() {
     testUsingContext('selects specified target', () async {
       const int devicePort = 499;
       const int hostPort = 42;
-      final MockDeviceLogReader mockLogReader = MockDeviceLogReader();
+      final FakeDeviceLogReader mockLogReader = FakeDeviceLogReader();
       final MockPortForwarder portForwarder = MockPortForwarder();
       final MockAndroidDevice device = MockAndroidDevice();
       final MockHotRunner mockHotRunner = MockHotRunner();
@@ -434,7 +435,7 @@ void main() {
     testUsingContext('fallbacks to protocol observatory if MDNS failed on iOS', () async {
       const int devicePort = 499;
       const int hostPort = 42;
-      final MockDeviceLogReader mockLogReader = MockDeviceLogReader();
+      final FakeDeviceLogReader mockLogReader = FakeDeviceLogReader();
       final MockPortForwarder portForwarder = MockPortForwarder();
       final MockIOSDevice device = MockIOSDevice();
       final MockHotRunner mockHotRunner = MockHotRunner();

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

@@ -21,6 +21,7 @@ import 'package:webdriver/sync_io.dart' as sync_io;
 
 import '../../src/common.dart';
 import '../../src/context.dart';
+import '../../src/fakes.dart';
 import '../../src/mocks.dart';
 
 void main() {
@@ -351,7 +352,7 @@ void main() {
         final Device mockDevice = MockDevice();
         testDeviceManager.addDevice(mockDevice);
 
-        final MockDeviceLogReader mockDeviceLogReader = MockDeviceLogReader();
+        final FakeDeviceLogReader mockDeviceLogReader = FakeDeviceLogReader();
         when(mockDevice.getLogReader()).thenReturn(mockDeviceLogReader);
         final MockLaunchResult mockLaunchResult = MockLaunchResult();
         when(mockLaunchResult.started).thenReturn(true);
@@ -481,7 +482,7 @@ void main() {
         final Device mockDevice = MockDevice();
         testDeviceManager.addDevice(mockDevice);
 
-        final MockDeviceLogReader mockDeviceLogReader = MockDeviceLogReader();
+        final FakeDeviceLogReader mockDeviceLogReader = FakeDeviceLogReader();
         when(mockDevice.getLogReader()).thenReturn(mockDeviceLogReader);
         final MockLaunchResult mockLaunchResult = MockLaunchResult();
         when(mockLaunchResult.started).thenReturn(true);

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

@@ -32,6 +32,7 @@ import 'package:mockito/mockito.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
+import '../../src/fakes.dart';
 import '../../src/mocks.dart';
 import '../../src/testbed.dart';
 
@@ -279,7 +280,7 @@ void main() {
         applyMocksToCommand(command);
         final MockDevice mockDevice = MockDevice(TargetPlatform.ios);
         when(mockDevice.isLocalEmulator).thenAnswer((Invocation invocation) => Future<bool>.value(false));
-        when(mockDevice.getLogReader(app: anyNamed('app'))).thenReturn(MockDeviceLogReader());
+        when(mockDevice.getLogReader(app: anyNamed('app'))).thenReturn(FakeDeviceLogReader());
         when(mockDevice.supportsFastStart).thenReturn(true);
         when(mockDevice.sdkNameAndVersion).thenAnswer((Invocation invocation) => Future<String>.value('iOS 13'));
         // App fails to start because we're only interested in usage
@@ -633,7 +634,7 @@ class FakeDevice extends Fake implements Device {
 
   @override
   DeviceLogReader getLogReader({ ApplicationPackage app }) {
-    return MockDeviceLogReader();
+    return FakeDeviceLogReader();
   }
 
   @override

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

@@ -10,11 +10,11 @@ import 'package:quiver/testing/async.dart';
 
 import '../src/common.dart';
 import '../src/context.dart';
-import '../src/mocks.dart';
+import '../src/fakes.dart';
 
 void main() {
   group('service_protocol discovery', () {
-    MockDeviceLogReader logReader;
+    FakeDeviceLogReader logReader;
     ProtocolDiscovery discoverer;
 
     /// Performs test set-up functionality that must be performed as part of
@@ -37,7 +37,7 @@ void main() {
       int devicePort,
       Duration throttleDuration = const Duration(milliseconds: 200),
     }) {
-      logReader = MockDeviceLogReader();
+      logReader = FakeDeviceLogReader();
       discoverer = ProtocolDiscovery.observatory(
         logReader,
         ipv6: false,
@@ -261,7 +261,7 @@ void main() {
 
     group('port forwarding', () {
       testUsingContext('default port', () async {
-        final MockDeviceLogReader logReader = MockDeviceLogReader();
+        final FakeDeviceLogReader logReader = FakeDeviceLogReader();
         final ProtocolDiscovery discoverer = ProtocolDiscovery.observatory(
           logReader,
           portForwarder: MockPortForwarder(99),
@@ -282,7 +282,7 @@ void main() {
       });
 
       testUsingContext('specified port', () async {
-        final MockDeviceLogReader logReader = MockDeviceLogReader();
+        final FakeDeviceLogReader logReader = FakeDeviceLogReader();
         final ProtocolDiscovery discoverer = ProtocolDiscovery.observatory(
           logReader,
           portForwarder: MockPortForwarder(99),
@@ -303,7 +303,7 @@ void main() {
       });
 
       testUsingContext('specified port zero', () async {
-        final MockDeviceLogReader logReader = MockDeviceLogReader();
+        final FakeDeviceLogReader logReader = FakeDeviceLogReader();
         final ProtocolDiscovery discoverer = ProtocolDiscovery.observatory(
           logReader,
           portForwarder: MockPortForwarder(99),
@@ -324,7 +324,7 @@ void main() {
       });
 
       testUsingContext('ipv6', () async {
-        final MockDeviceLogReader logReader = MockDeviceLogReader();
+        final FakeDeviceLogReader logReader = FakeDeviceLogReader();
         final ProtocolDiscovery discoverer = ProtocolDiscovery.observatory(
           logReader,
           portForwarder: MockPortForwarder(99),
@@ -345,7 +345,7 @@ void main() {
       });
 
       testUsingContext('ipv6 with Ascii Escape code', () async {
-        final MockDeviceLogReader logReader = MockDeviceLogReader();
+        final FakeDeviceLogReader logReader = FakeDeviceLogReader();
         final ProtocolDiscovery discoverer = ProtocolDiscovery.observatory(
           logReader,
           portForwarder: MockPortForwarder(99),

packages/flutter_tools/test/src/fake_process_manager.dart

@@ -82,40 +82,15 @@ class FakeCommand {
   /// resolves.
   final Completer<void> completer;
 
-  static bool _listEquals<T>(List<T> a, List<T> b) {
-    if (a == null) {
-      return b == null;
-    }
-    if (b == null || a.length != b.length) {
-      return false;
-    }
-    for (int index = 0; index < a.length; index += 1) {
-      if (a[index] != b[index]) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  bool _matches(List<String> command, String workingDirectory, Map<String, String> environment) {
-    if (!_listEquals(command, this.command)) {
-      return false;
-    }
-    if (this.workingDirectory != null && workingDirectory != this.workingDirectory) {
-      return false;
+  void _matches(List<String> command, String workingDirectory, Map<String, String> environment) {
+    expect(command, equals(this.command));
+    if (this.workingDirectory != null) {
+      expect(this.workingDirectory, workingDirectory);
     }
     if (this.environment != null) {
-      if (environment == null) {
-        return false;
-      }
-      for (final String key in environment.keys) {
-        if (environment[key] != this.environment[key]) {
-          return false;
-        }
+      expect(this.environment, environment);
     }
   }
-    return true;
-  }
 }
 
 class _FakeProcess implements Process {
@@ -322,12 +297,7 @@ class _SequenceProcessManager extends FakeProcessManager {
       reason: 'ProcessManager was told to execute $command (in $workingDirectory) '
               'but the FakeProcessManager.list expected no more processes.'
     );
-    expect(_commands.first._matches(command, workingDirectory, environment), isTrue,
-      reason: 'ProcessManager was told to execute $command '
-              '(in $workingDirectory, with environment $environment) '
-              'but the next process that was expected was ${_commands.first.command} '
-              '(in ${_commands.first.workingDirectory}, with environment ${_commands.first.environment})}.'
-    );
+    _commands.first._matches(command, workingDirectory, environment);
     return _commands.removeAt(0);
   }
 

packages/flutter_tools/test/src/fakes.dart

+// 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:async';
+
+import 'package:flutter_tools/src/device.dart';
+
+/// A fake implementation of the [DeviceLogReader].
+class FakeDeviceLogReader extends DeviceLogReader {
+  @override
+  String get name => 'FakeLogReader';
+
+  StreamController<String> _cachedLinesController;
+
+  final List<String> _lineQueue = <String>[];
+  StreamController<String> get _linesController {
+    _cachedLinesController ??= StreamController<String>
+      .broadcast(onListen: () {
+        _lineQueue.forEach(_linesController.add);
+        _lineQueue.clear();
+     });
+    return _cachedLinesController;
+  }
+
+  @override
+  Stream<String> get logLines => _linesController.stream;
+
+  void addLine(String line) {
+    if (_linesController.hasListener) {
+      _linesController.add(line);
+    } else {
+      _lineQueue.add(line);
+    }
+  }
+
+  @override
+  Future<void> dispose() async {
+    _lineQueue.clear();
+    await _linesController.close();
+  }
+}

packages/flutter_tools/test/src/mocks.dart

@@ -612,40 +612,6 @@ class MockIOSSimulator extends Mock implements IOSSimulator {
   bool isSupportedForProject(FlutterProject flutterProject) => true;
 }
 
-class MockDeviceLogReader extends DeviceLogReader {
-  @override
-  String get name => 'MockLogReader';
-
-  StreamController<String> _cachedLinesController;
-
-  final List<String> _lineQueue = <String>[];
-  StreamController<String> get _linesController {
-    _cachedLinesController ??= StreamController<String>
-      .broadcast(onListen: () {
-        _lineQueue.forEach(_linesController.add);
-        _lineQueue.clear();
-     });
-    return _cachedLinesController;
-  }
-
-  @override
-  Stream<String> get logLines => _linesController.stream;
-
-  void addLine(String line) {
-    if (_linesController.hasListener) {
-      _linesController.add(line);
-    } else {
-      _lineQueue.add(line);
-    }
-  }
-
-  @override
-  Future<void> dispose() async {
-    _lineQueue.clear();
-    await _linesController.close();
-  }
-}
-
 void applyMocksToCommand(FlutterCommand command) {
   command.applicationPackages = MockApplicationPackageStore();
 }