Add package:flutter_test

This package contains WidgetTester, which is very useful when writing tests for
widgets.

packages/flutter_test/lib/flutter_test.dart

+// Copyright 2015 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.
+
+library flutter_test;
+
+export 'src/test_pointer.dart';
+export 'src/widget_tester.dart';

packages/unit/test/engine/mock_events.dart → packages/flutter_test/lib/src/test_pointer.dart

+// Copyright 2015 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 'dart:ui' as ui;
 
 import 'package:flutter/gestures.dart';

packages/unit/test/widget/widget_tester.dart → packages/flutter_test/lib/src/widget_tester.dart

@@ -11,24 +11,7 @@ import 'package:flutter/widgets.dart';
 import 'package:quiver/testing/async.dart';
 import 'package:quiver/time.dart';
 
-import '../engine/mock_events.dart';
-
-class RootComponent extends StatefulComponent {
-  RootComponentState createState() => new RootComponentState();
-}
-
-class RootComponentState extends State<RootComponent> {
-  Widget _child = new DecoratedBox(decoration: new BoxDecoration());
-  Widget get child => _child;
-  void set child(Widget value) {
-    if (value != _child) {
-      setState(() {
-        _child = value;
-      });
-    }
-  }
-  Widget build(BuildContext context) => child;
-}
+import 'test_pointer.dart';
 
 typedef Point SizeToPointFunction(Size size);
 

packages/flutter_test/pubspec.yaml

+name: flutter_test
+dependencies:
+  test: ^0.12.5
+  quiver: ^0.21.4
+  flutter:
+    path: ../flutter
+
+  # So that the test harness is available when running the tests.
+  flutter_tools:
+    path: ../flutter_tools

packages/unit/benchmark/stocks/animation_bench.dart

 import 'dart:io';
 
-import 'package:flutter/rendering.dart';
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:stocks/main.dart' as stocks;
 import 'package:stocks/stock_data.dart' as stock_data;
-import '../../test/widget/widget_tester.dart';
 
 const int _kNumberOfIterations = 50000;
 const bool _kRunForever = false;

packages/unit/benchmark/stocks/build_bench.dart

 import 'dart:io';
 
-import 'package:flutter/rendering.dart';
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:stocks/main.dart' as stocks;
 import 'package:stocks/stock_data.dart' as stock_data;
-import '../../test/widget/widget_tester.dart';
 
 const int _kNumberOfIterations = 100000;
 const bool _kRunForever = false;

packages/unit/benchmark/stocks/layout_bench.dart

 import 'dart:io';
 
-import 'package:flutter/rendering.dart';
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:stocks/main.dart' as stocks;
 import 'package:stocks/stock_data.dart' as stock_data;
-import '../../test/widget/widget_tester.dart';
 
 const int _kNumberOfIterations = 100000;
 const bool _kRunForever = false;

packages/unit/pubspec.yaml

 name: flutter_unit_tests
 dependencies:
-  test: ^0.12.5
-  quiver: ^0.21.4
   flx:
     path: ../flx
   flutter:
     path: ../flutter
+  flutter_test:
+    path: ../flutter_test
   stocks:
     path: ../../examples/stocks
-  # To ensure the version of test doesn't get out of sync.
-  flutter_tools:
-    path: ../flutter_tools

packages/unit/test/gestures/pointer_router_test.dart

+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/gestures.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-
 void main() {
   test('Should route pointers', () {
     bool callbackRan = false;

packages/unit/test/gestures/scale_test.dart

 import 'dart:ui' as ui;
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/gestures.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-
 void main() {
   test('Should recognize scale gestures', () {
     PointerRouter router = new PointerRouter();

packages/unit/test/gestures/scroll_test.dart

 import 'dart:ui' as ui;
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/gestures.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-
 void main() {
   test('Should recognize pan', () {
     PointerRouter router = new PointerRouter();

packages/unit/test/widget/align_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Align smoke test', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/animated_container_test.dart

@@ -2,13 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/animation.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('AnimatedContainer control test', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/block_test.dart

@@ -2,12 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-import 'widget_tester.dart';
-
 final Key blockKey = new Key('test');
 
 void main() {

packages/unit/test/widget/bottom_sheet_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Verify that a tap dismisses a modal BottomSheet', () {
     testWidgets((WidgetTester tester) {
@@ -79,7 +78,7 @@ void main() {
       expect(showBottomSheetThenCalled, isFalse);
       expect(tester.findText('BottomSheet'), isNull);
 
-      scaffoldKey.currentState.showBottomSheet((BuildContext context) { 
+      scaffoldKey.currentState.showBottomSheet((BuildContext context) {
         return new Container(
           margin: new EdgeDims.all(40.0),
           child: new Text('BottomSheet')

packages/unit/test/widget/box_decoration_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Circles can have uniform borders', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/build_scope_test.dart

@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/animation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
 import 'test_widgets.dart';
 
 class ProbeWidget extends StatefulComponent {

packages/unit/test/widget/center_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Can be placed in an infinte box', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/coordinates_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Comparing coordinates', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/custom_multi_child_layout_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class TestMultiChildLayoutDelegate extends MultiChildLayoutDelegate {
   BoxConstraints getSizeConstraints;
 

packages/unit/test/widget/custom_one_child_layout_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class TestOneChildLayoutDelegate extends OneChildLayoutDelegate {
   BoxConstraints constraintsFromGetSize;
   BoxConstraints constraintsFromGetConstraintsForChild;

packages/unit/test/widget/date_picker_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Can select a day', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/dismissable_test.dart

@@ -2,13 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-import 'widget_tester.dart';
-
 const double itemExtent = 100.0;
 ScrollDirection scrollDirection = ScrollDirection.vertical;
 DismissDirection dismissDirection = DismissDirection.horizontal;
@@ -284,4 +282,3 @@ void main() {
     });
   });
 }
-

packages/unit/test/widget/draggable_test.dart

@@ -2,12 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-import 'widget_tester.dart';
-
 void main() {
   test('Drag and drop - control test', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/drawer_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
 
   test('Drawer control test', () {

packages/unit/test/widget/duplicate_key_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class Item {
   GlobalKey key1 = new GlobalKey();
   GlobalKey key2 = new GlobalKey();

packages/unit/test/widget/flex_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Can hit test flex children of stacks', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/focus_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class TestFocusable extends StatelessComponent {
   TestFocusable(this.no, this.yes, GlobalKey key) : super(key: key);
   final String no;

packages/unit/test/widget/fractionally_sized_box_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('FractionallySizedBox', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/gesture_detector_test.dart

@@ -2,12 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-import 'widget_tester.dart';
-
 void main() {
   test('Uncontested scrolls start immediately', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/heroes_test.dart

@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
 import 'test_matchers.dart';
-import 'widget_tester.dart';
 
 Key firstKey = new Key('first');
 Key secondKey = new Key('second');

packages/unit/test/widget/homogeneous_viewport_test.dart

@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
 import 'test_widgets.dart';
 
 void main() {

packages/unit/test/widget/init_state_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 List<String> ancestors = <String>[];
 
 class TestComponent extends StatefulComponent {

packages/unit/test/widget/input_test.dart

@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:mojo_services/keyboard/keyboard.mojom.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/material.dart';
+import 'package:mojo_services/keyboard/keyboard.mojom.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
 import '../services/mock_services.dart';
 
 class MockKeyboard implements KeyboardService {

packages/unit/test/widget/listener_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Events bubble up the tree', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/mixed_viewport_test.dart

@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
 import 'test_widgets.dart';
 
 void main() {

packages/unit/test/widget/multichild_test.dart

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
 import 'test_widgets.dart';
-import 'widget_tester.dart';
 
 void checkTree(WidgetTester tester, List<BoxDecoration> expectedDecorations) {
   MultiChildRenderObjectElement element =

packages/unit/test/widget/navigator_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class FirstComponent extends StatelessComponent {
   Widget build(BuildContext context) {
     return new GestureDetector(

packages/unit/test/widget/page_transitions_test.dart

@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
 import 'test_matchers.dart';
-import 'widget_tester.dart';
 
 class TestOverlayRoute extends OverlayRoute {
   List<WidgetBuilder> get builders => <WidgetBuilder>[ _build ];

packages/unit/test/widget/pageable_list_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 const Size pageSize = const Size(800.0, 600.0);
 const List<int> pages = const <int>[0, 1, 2, 3, 4, 5];
 int currentPage = null;

packages/unit/test/widget/parent_data_test.dart

@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
 import 'test_widgets.dart';
-import 'widget_tester.dart';
 
 class TestParentData {
   TestParentData({ this.top, this.right, this.bottom, this.left });

packages/unit/test/widget/positioned_test.dart

@@ -2,13 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/animation.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
 
   test('Can animate position data', () {

packages/unit/test/widget/progress_indicator_test.dart

@@ -2,13 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('LinearProgressIndicator changes when its value changes', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/remember_scroll_position_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/animation.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class ThePositiveNumbers extends ScrollableWidgetList {
   ThePositiveNumbers() : super(itemExtent: 100.0);
   ThePositiveNumbersState createState() => new ThePositiveNumbersState();

packages/unit/test/widget/render_object_widget_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 final BoxDecoration kBoxDecorationA = new BoxDecoration();
 final BoxDecoration kBoxDecorationB = new BoxDecoration();
 final BoxDecoration kBoxDecorationC = new BoxDecoration();

packages/unit/test/widget/reparent_state_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class StateMarker extends StatefulComponent {
   StateMarker({ Key key, this.child }) : super(key: key);
 

packages/unit/test/widget/scrollable_list_hit_testing_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 List<int> tapped = <int>[];
 

packages/unit/test/widget/scrollable_list_horizontal_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 
 Widget buildFrame() {

packages/unit/test/widget/scrollable_list_vertical_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 const List<int> items = const <int>[0, 1, 2, 3, 4, 5];
 
 Widget buildFrame() {

packages/unit/test/widget/scrollable_list_with_inherited_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 List<int> items = <int>[0, 1, 2, 3, 4, 5];
 
 Widget buildCard(BuildContext context, int index) {

packages/unit/test/widget/set_state_3_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 ChangerState changer;
 
 class Changer extends StatefulComponent {

packages/unit/test/widget/set_state_test.dart

@@ -2,12 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import '../engine/mock_events.dart';
-import 'widget_tester.dart';
-
 class Inside extends StatefulComponent {
   InsideState createState() => new InsideState();
 }

packages/unit/test/widget/shader_mask_test.dart

@@ -4,12 +4,11 @@
 
 import 'dart:ui' as ui;
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/painting.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 ui.Shader createShader(Rect bounds) {
   return new LinearGradient(
       begin: Point.origin,

packages/unit/test/widget/size_observer_test.dart

@@ -2,13 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('SizeObserver notices zero size', () {
     testWidgets((WidgetTester tester) {

packages/unit/test/widget/snack_bar_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class Builder extends StatelessComponent {
   Builder({ this.builder });
   final WidgetBuilder builder;
@@ -55,7 +54,7 @@ void main() {
       expect(tester.findText(helloSnackBar), isNotNull);
       tester.pump(new Duration(milliseconds: 750)); // 1.50s
       expect(tester.findText(helloSnackBar), isNotNull);
-      tester.pump(new Duration(milliseconds: 750)); // 2.25s 
+      tester.pump(new Duration(milliseconds: 750)); // 2.25s
       expect(tester.findText(helloSnackBar), isNotNull);
       tester.pump(new Duration(milliseconds: 750)); // 3.00s // timer triggers to dismiss snackbar, reverse animation is scheduled
       tester.pump(); // begin animation
@@ -114,7 +113,7 @@ void main() {
       tester.pump(new Duration(milliseconds: 750)); // 1.50s
       expect(tester.findText('bar1'), isNotNull);
       expect(tester.findText('bar2'), isNull);
-      tester.pump(new Duration(milliseconds: 750)); // 2.25s 
+      tester.pump(new Duration(milliseconds: 750)); // 2.25s
       expect(tester.findText('bar1'), isNotNull);
       expect(tester.findText('bar2'), isNull);
       tester.pump(new Duration(milliseconds: 750)); // 3.00s // timer triggers to dismiss snackbar, reverse animation is scheduled
@@ -133,7 +132,7 @@ void main() {
       tester.pump(new Duration(milliseconds: 750)); // 5.25s
       expect(tester.findText('bar1'), isNull);
       expect(tester.findText('bar2'), isNotNull);
-      tester.pump(new Duration(milliseconds: 750)); // 6.00s 
+      tester.pump(new Duration(milliseconds: 750)); // 6.00s
       expect(tester.findText('bar1'), isNull);
       expect(tester.findText('bar2'), isNotNull);
       tester.pump(new Duration(milliseconds: 750)); // 6.75s // timer triggers to dismiss snackbar, reverse animation is scheduled
@@ -200,10 +199,10 @@ void main() {
       tester.pump(new Duration(milliseconds: 750)); // 1.50s
       expect(tester.findText('bar1'), isNotNull);
       expect(tester.findText('bar2'), isNull);
-      tester.pump(new Duration(milliseconds: 750)); // 2.25s 
+      tester.pump(new Duration(milliseconds: 750)); // 2.25s
       expect(tester.findText('bar1'), isNotNull);
       expect(tester.findText('bar2'), isNull);
-      tester.pump(new Duration(milliseconds: 10000)); // 12.25s 
+      tester.pump(new Duration(milliseconds: 10000)); // 12.25s
       expect(tester.findText('bar1'), isNotNull);
       expect(tester.findText('bar2'), isNull);
 
@@ -225,7 +224,7 @@ void main() {
       tester.pump(new Duration(milliseconds: 750)); // 15.25s
       expect(tester.findText('bar1'), isNull);
       expect(tester.findText('bar2'), isNotNull);
-      tester.pump(new Duration(milliseconds: 750)); // 16.00s 
+      tester.pump(new Duration(milliseconds: 750)); // 16.00s
       expect(tester.findText('bar1'), isNull);
       expect(tester.findText('bar2'), isNotNull);
       tester.pump(new Duration(milliseconds: 750)); // 16.75s // timer triggers to dismiss snackbar, reverse animation is scheduled

packages/unit/test/widget/snap_scrolling_test.dart

@@ -4,11 +4,10 @@
 
 import 'dart:async';
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 const double itemExtent = 200.0;
 ScrollDirection scrollDirection = ScrollDirection.vertical;
 GlobalKey scrollableListKey;

packages/unit/test/widget/stack_test.dart

@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
 import '../rendering/rendering_tester.dart';
 
 void main() {

packages/unit/test/widget/stateful_component_test.dart

@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
 import 'test_widgets.dart';
 
 void main() {

packages/unit/test/widget/stateful_components_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class InnerComponent extends StatefulComponent {
   InnerComponent({ Key key }) : super(key: key);
   InnerComponentState createState() => new InnerComponentState();

packages/unit/test/widget/syncing_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 class TestWidget extends StatefulComponent {
   TestWidget({ this.child, this.persistentState, this.syncedState });
 

packages/unit/test/widget/tabs_test.dart

@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 int selectedIndex = 2;
 
 Widget buildFrame({ List<String> tabs, bool isScrollable: false }) {

packages/unit/test/widget/test_widgets.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 final BoxDecoration kBoxDecorationA = new BoxDecoration(
   backgroundColor: const Color(0xFFFF0000)
 );

packages/unit/test/widget/transform_test.dart

@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 import 'package:test/test.dart';
 
-import 'widget_tester.dart';
-
 void main() {
   test('Transform origin', () {
     testWidgets((WidgetTester tester) {