remove the isConnected() method from device

packages/flutter_tools/lib/src/android/android_device.dart

@@ -41,19 +41,13 @@ class AndroidDevice extends Device {
     String id, {
     this.productID,
     this.modelID,
-    this.deviceCodeName,
-    bool connected
-  }) : super(id) {
-    if (connected != null)
-      _connected = connected;
-  }
+    this.deviceCodeName
+  }) : super(id);
 
   final String productID;
   final String modelID;
   final String deviceCodeName;
 
-  bool _connected;
-
   bool get isLocalEmulator => false;
 
   List<String> adbCommandForDevice(List<String> args) {
@@ -152,9 +146,6 @@ class AndroidDevice extends Device {
 
   @override
   bool isAppInstalled(ApplicationPackage app) {
-    if (!isConnected())
-      return false;
-
     if (runCheckedSync(adbCommandForDevice(<String>['shell', 'pm', 'path', app.id])) == '') {
       printTrace('TODO(iansf): move this log to the caller. ${app.name} is not on the device. Installing now...');
       return false;
@@ -169,11 +160,6 @@ class AndroidDevice extends Device {
 
   @override
   bool installApp(ApplicationPackage app) {
-    if (!isConnected()) {
-      printTrace('Android device not connected. Not installing.');
-      return false;
-    }
-
     if (!FileSystemEntity.isFileSync(app.localPath)) {
       printError('"${app.localPath}" does not exist.');
       return false;
@@ -390,14 +376,8 @@ class AndroidDevice extends Device {
     return null;
   }
 
-  bool isConnected() => _connected ?? androidSdk != null;
-
   bool isSupported() => true;
 
-  void setConnected(bool value) {
-    _connected = value;
-  }
-
   Future<bool> refreshSnapshot(AndroidApk apk, String snapshotPath) async {
     if (!FileSystemEntity.isFileSync(snapshotPath)) {
       printError('Cannot find $snapshotPath');
@@ -462,13 +442,12 @@ List<AndroidDevice> getAdbDevices() {
         deviceID,
         productID: productID,
         modelID: modelID,
-        deviceCodeName: deviceCodeName,
-        connected: true
+        deviceCodeName: deviceCodeName
       ));
     } else if (deviceRegex2.hasMatch(line)) {
       Match match = deviceRegex2.firstMatch(line);
       String deviceID = match[1];
-      devices.add(new AndroidDevice(deviceID, connected: true));
+      devices.add(new AndroidDevice(deviceID));
     } else if (unauthorizedRegex.hasMatch(line)) {
       Match match = unauthorizedRegex.firstMatch(line);
       String deviceID = match[1];
@@ -499,9 +478,6 @@ class _AdbLogReader extends DeviceLogReader {
   String get name => device.name;
 
   Future<int> logs({ bool clear: false, bool showPrefix: false }) async {
-    if (!device.isConnected())
-      return 2;
-
     if (clear)
       device.clearLogs();
 

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

@@ -430,7 +430,7 @@ Future<int> buildAll(
 }) async {
   for (Device device in devices.all) {
     ApplicationPackage package = applicationPackages.getPackageForPlatform(device.platform);
-    if (package == null || !device.isConnected())
+    if (package == null)
       continue;
 
     // TODO(mpcomplete): Temporary hack. We only support the apk builder atm.

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

@@ -347,7 +347,7 @@ Map<String, dynamic> _deviceToMap(Device device) {
     'id': device.id,
     'name': device.name,
     'platform': _enumToString(device.platform),
-    'available': device.isConnected()
+    'available': true
   };
 }
 

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

@@ -30,7 +30,7 @@ Future<bool> installApp(
 
   for (Device device in devices.all) {
     ApplicationPackage package = applicationPackages.getPackageForPlatform(device.platform);
-    if (package == null || !device.isConnected() || device.isAppInstalled(package))
+    if (package == null || device.isAppInstalled(package))
       continue;
     if (device.installApp(package))
       installedSomewhere = true;

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

@@ -36,7 +36,7 @@ class RefreshCommand extends FlutterCommand {
       downloadApplicationPackagesAndConnectToDevices(),
     ], eagerError: true);
 
-    if (devices.android == null || !devices.android.isConnected()) {
+    if (devices.android == null) {
       printError('No device connected.');
       return 1;
     }

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

@@ -185,7 +185,7 @@ Future<int> startApp(
 
   for (Device device in devices.all) {
     ApplicationPackage package = applicationPackages.getPackageForPlatform(device.platform);
-    if (package == null || !device.isConnected())
+    if (package == null)
       continue;
 
     if (!device.isSupported()) {
@@ -230,13 +230,14 @@ Future<int> startApp(
   }
 
   if (!startedSomething) {
-    int connected = devices.all.where((device) => device.isConnected()).length;
     String message = 'Unable to run application';
-    if (connected == 0) {
+
+    if (devices.all.isEmpty) {
       message += ' - no connected devices.';
     } else if (unsupportedCount != 0) {
       message += ' - $unsupportedCount unsupported ${pluralize('device', unsupportedCount)} connected';
     }
+
     printError(message);
   }
 

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

@@ -26,7 +26,7 @@ Future<bool> stopAll(DeviceStore devices, ApplicationPackageStore applicationPac
 
   for (Device device in devices.all) {
     ApplicationPackage package = applicationPackages.getPackageForPlatform(device.platform);
-    if (package == null || !device.isConnected())
+    if (package == null)
       continue;
     if (await device.stopApp(package))
       stoppedSomething = true;

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

@@ -33,7 +33,7 @@ class TraceCommand extends FlutterCommand {
   Future<int> runInProject() async {
     await downloadApplicationPackagesAndConnectToDevices();
 
-    if (devices.android == null || !devices.android.isConnected()) {
+    if (devices.android == null) {
       printError('No device connected, so no trace was completed.');
       return 1;
     }

packages/flutter_tools/lib/src/device.dart

@@ -136,9 +136,6 @@ abstract class Device {
   /// Install an app package on the current device
   bool installApp(ApplicationPackage app);
 
-  /// Check if the device is currently connected
-  bool isConnected();
-
   /// Check if the device is supported by Flutter
   bool isSupported();
 

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

@@ -125,9 +125,6 @@ class IOSDevice extends Device {
     return false;
   }
 
-  @override
-  bool isConnected() => _getAttachedDeviceIDs().contains(id);
-
   @override
   bool isSupported() => true;
 
@@ -235,9 +232,6 @@ class _IOSDeviceLogReader extends DeviceLogReader {
 
   // TODO(devoncarew): Support [clear].
   Future<int> logs({ bool clear: false, bool showPrefix: false }) async {
-    if (!device.isConnected())
-      return 2;
-
     return await runCommandAndStreamOutput(
       <String>[device.loggerPath],
       prefix: showPrefix ? '[$name] ' : '',

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

@@ -229,9 +229,6 @@ class IOSSimulator extends Device {
 
   @override
   bool installApp(ApplicationPackage app) {
-    if (!isConnected())
-      return false;
-
     try {
       SimControl.instance.install(id, app.localPath);
       return true;
@@ -240,8 +237,6 @@ class IOSSimulator extends Device {
     }
   }
 
-  bool isConnected() => Platform.isMacOS;
-
   @override
   bool isSupported() {
     if (!Platform.isMacOS) {
@@ -419,9 +414,6 @@ class _IOSSimulatorLogReader extends DeviceLogReader {
   String get name => device.name;
 
   Future<int> logs({ bool clear: false, bool showPrefix: false }) async {
-    if (!device.isConnected())
-      return 2;
-
     if (clear)
       device.clearLogs();
 

packages/flutter_tools/test/daemon_test.dart

@@ -112,13 +112,8 @@ defineTests() {
 
       MockDeviceStore mockDevices = command.devices;
 
-      when(mockDevices.android.isConnected()).thenReturn(true);
       when(mockDevices.android.stopApp(any)).thenReturn(true);
-
-      when(mockDevices.iOS.isConnected()).thenReturn(false);
       when(mockDevices.iOS.stopApp(any)).thenReturn(false);
-
-      when(mockDevices.iOSSimulator.isConnected()).thenReturn(false);
       when(mockDevices.iOSSimulator.stopApp(any)).thenReturn(false);
 
       commands.add({'id': 0, 'method': 'app.stopAll'});

packages/flutter_tools/test/install_test.dart

@@ -19,15 +19,12 @@ defineTests() {
       applyMocksToCommand(command);
       MockDeviceStore mockDevices = command.devices;
 
-      when(mockDevices.android.isConnected()).thenReturn(true);
       when(mockDevices.android.isAppInstalled(any)).thenReturn(false);
       when(mockDevices.android.installApp(any)).thenReturn(true);
 
-      when(mockDevices.iOS.isConnected()).thenReturn(false);
       when(mockDevices.iOS.isAppInstalled(any)).thenReturn(false);
       when(mockDevices.iOS.installApp(any)).thenReturn(false);
 
-      when(mockDevices.iOSSimulator.isConnected()).thenReturn(false);
       when(mockDevices.iOSSimulator.isAppInstalled(any)).thenReturn(false);
       when(mockDevices.iOSSimulator.installApp(any)).thenReturn(false);
 
@@ -43,15 +40,12 @@ defineTests() {
       applyMocksToCommand(command);
       MockDeviceStore mockDevices = command.devices;
 
-      when(mockDevices.android.isConnected()).thenReturn(false);
       when(mockDevices.android.isAppInstalled(any)).thenReturn(false);
       when(mockDevices.android.installApp(any)).thenReturn(false);
 
-      when(mockDevices.iOS.isConnected()).thenReturn(true);
       when(mockDevices.iOS.isAppInstalled(any)).thenReturn(false);
       when(mockDevices.iOS.installApp(any)).thenReturn(true);
 
-      when(mockDevices.iOSSimulator.isConnected()).thenReturn(false);
       when(mockDevices.iOSSimulator.isAppInstalled(any)).thenReturn(false);
       when(mockDevices.iOSSimulator.installApp(any)).thenReturn(false);
 

packages/flutter_tools/test/src/context.dart

@@ -48,8 +48,11 @@ void testUsingContext(String description, dynamic testMethod(), {
     if (!overrides.containsKey(OperatingSystemUtils))
       testContext[OperatingSystemUtils] = new MockOperatingSystemUtils();
 
-    if (!overrides.containsKey(IOSSimulatorUtils))
-      testContext[IOSSimulatorUtils] = new MockIOSSimulatorUtils();
+    if (!overrides.containsKey(IOSSimulatorUtils)) {
+      MockIOSSimulatorUtils mock = new MockIOSSimulatorUtils();
+      when(mock.getAttachedDevices()).thenReturn(<IOSSimulator>[]);
+      testContext[IOSSimulatorUtils] = mock;
+    }
 
     if (Platform.isMacOS) {
       if (!overrides.containsKey(XCode))

packages/flutter_tools/test/stop_test.dart

@@ -19,13 +19,8 @@ defineTests() {
       applyMocksToCommand(command);
       MockDeviceStore mockDevices = command.devices;
 
-      when(mockDevices.android.isConnected()).thenReturn(true);
       when(mockDevices.android.stopApp(any)).thenReturn(true);
-
-      when(mockDevices.iOS.isConnected()).thenReturn(false);
       when(mockDevices.iOS.stopApp(any)).thenReturn(false);
-
-      when(mockDevices.iOSSimulator.isConnected()).thenReturn(false);
       when(mockDevices.iOSSimulator.stopApp(any)).thenReturn(false);
 
       return createTestCommandRunner(command).run(['stop']).then((int code) {
@@ -38,13 +33,8 @@ defineTests() {
       applyMocksToCommand(command);
       MockDeviceStore mockDevices = command.devices;
 
-      when(mockDevices.android.isConnected()).thenReturn(false);
       when(mockDevices.android.stopApp(any)).thenReturn(false);
-
-      when(mockDevices.iOS.isConnected()).thenReturn(true);
       when(mockDevices.iOS.stopApp(any)).thenReturn(true);
-
-      when(mockDevices.iOSSimulator.isConnected()).thenReturn(false);
       when(mockDevices.iOSSimulator.stopApp(any)).thenReturn(false);
 
       return createTestCommandRunner(command).run(['stop']).then((int code) {

packages/flutter_tools/test/trace_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'package:flutter_tools/src/commands/trace.dart';
-import 'package:mockito/mockito.dart';
 import 'package:test/test.dart';
 
 import 'src/common.dart';
@@ -17,10 +16,6 @@ defineTests() {
     testUsingContext('returns 1 when no Android device is connected', () {
       TraceCommand command = new TraceCommand();
       applyMocksToCommand(command);
-      MockDeviceStore mockDevices = command.devices;
-
-      when(mockDevices.android.isConnected()).thenReturn(false);
-
       return createTestCommandRunner(command).run(['trace']).then((int code) {
         expect(code, equals(1));
       });