packages/flutter/test/material/outline_button_test.dart - mirrors/flutter - Git at Google

 // Copyright 2018 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/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/rendering.dart';

 import '../rendering/mock_canvas.dart';
 import '../widgets/semantics_tester.dart';

 void main() {
   testWidgets('Outline button responds to tap when enabled', (WidgetTester tester) async {
     int pressedCount = 0;

     Widget buildFrame(VoidCallback onPressed) {
       return Directionality(
         textDirection: TextDirection.ltr,
         child: Theme(
           data: ThemeData(),
           child: Center(
             child: OutlineButton(onPressed: onPressed),
           ),
         ),
       );
     }

     await tester.pumpWidget(
       buildFrame(() { pressedCount += 1; }),
     );
     expect(tester.widget<OutlineButton>(find.byType(OutlineButton)).enabled, true);
     await tester.tap(find.byType(OutlineButton));
     await tester.pumpAndSettle();
     expect(pressedCount, 1);

     await tester.pumpWidget(
       buildFrame(null),
     );
     final Finder outlineButton = find.byType(OutlineButton);
     expect(tester.widget<OutlineButton>(outlineButton).enabled, false);
     await tester.tap(outlineButton);
     await tester.pumpAndSettle();
     expect(pressedCount, 1);
   });

   testWidgets('Outline button doesn\'t crash if disabled during a gesture', (WidgetTester tester) async {
     Widget buildFrame(VoidCallback onPressed) {
       return Directionality(
         textDirection: TextDirection.ltr,
         child: Theme(
           data: ThemeData(),
           child: Center(
             child: OutlineButton(onPressed: onPressed),
           ),
         ),
       );
     }

     await tester.pumpWidget(buildFrame(() { }));
     await tester.press(find.byType(OutlineButton));
     await tester.pumpAndSettle();
     await tester.pumpWidget(buildFrame(null));
     await tester.pumpAndSettle();
   });

   testWidgets('OutlineButton shape and border component overrides', (WidgetTester tester) async {
     const Color fillColor = Color(0xFF00FF00);
     const Color borderColor = Color(0xFFFF0000);
     const Color highlightedBorderColor = Color(0xFF0000FF);
     const Color disabledBorderColor = Color(0xFFFF00FF);
     const double borderWidth = 4.0;

     Widget buildFrame({ VoidCallback onPressed }) {
       return Directionality(
         textDirection: TextDirection.ltr,
         child: Theme(
           data: ThemeData(materialTapTargetSize: MaterialTapTargetSize.shrinkWrap),
           child: Container(
             alignment: Alignment.topLeft,
             child: OutlineButton(
               shape: const RoundedRectangleBorder(), // default border radius is 0
               clipBehavior: Clip.antiAlias,
               color: fillColor,
               // Causes the button to be filled with the theme's canvasColor
               // instead of Colors.transparent before the button material's
               // elevation is animated to 2.0.
               highlightElevation: 2.0,
               highlightedBorderColor: highlightedBorderColor,
               disabledBorderColor: disabledBorderColor,
               borderSide: const BorderSide(
                 width: borderWidth,
                 color: borderColor,
               ),
               onPressed: onPressed,
               child: const Text('button'),
             ),
           ),
         ),
       );
     }

     final Rect clipRect = Rect.fromLTRB(0.0, 0.0, 116.0, 36.0);
     final Path clipPath = Path()..addRect(clipRect);

     final Finder outlineButton = find.byType(OutlineButton);

     // Pump a button with a null onPressed callback to make it disabled.
     await tester.pumpWidget(
       buildFrame(onPressed: null),
     );

     // Expect that the button is disabled and painted with the disabled border color.
     expect(tester.widget<OutlineButton>(outlineButton).enabled, false);
     expect(
       outlineButton,
       paints
         ..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
         ..path(color: disabledBorderColor, strokeWidth: borderWidth));

     // Pump a new button with a no-op onPressed callback to make it enabled.
     await tester.pumpWidget(
       buildFrame(onPressed: () { }),
     );

     // Wait for the border color to change from disabled to enabled.
     await tester.pumpAndSettle();

     // Expect that the button is enabled and painted with the enabled border color.
     expect(tester.widget<OutlineButton>(outlineButton).enabled, true);
     expect(
       outlineButton,
       paints
         // initially the interior of the button is transparent
         ..path(color: fillColor.withAlpha(0x00))
         ..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
         ..path(color: borderColor, strokeWidth: borderWidth));

     final Offset center = tester.getCenter(outlineButton);
     final TestGesture gesture = await tester.startGesture(center);
     await tester.pump(); // start gesture
     // Wait for the border's color to change to highlightedBorderColor and
     // the fillColor to become opaque.
     await tester.pump(const Duration(milliseconds: 200));
     expect(
       outlineButton,
       paints
         ..path(color: fillColor.withAlpha(0xFF))
         ..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
         ..path(color: highlightedBorderColor, strokeWidth: borderWidth));

     // Tap gesture completes, button returns to its initial configuration.
     await gesture.up();
     await tester.pumpAndSettle();
     expect(
       outlineButton,
       paints
         ..path(color: fillColor.withAlpha(0x00))
         ..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
         ..path(color: borderColor, strokeWidth: borderWidth));
   });

   testWidgets('OutlineButton has no clip by default', (WidgetTester tester) async {
     final GlobalKey buttonKey = GlobalKey();
     await tester.pumpWidget(
       Directionality(
         textDirection: TextDirection.ltr,
         child: Material(
           child: Center(
             child: OutlineButton(
                 key: buttonKey,
                 onPressed: () { },
                 child: const Text('ABC'),
             ),
           ),
         ),
       ),
     );

     expect(
         tester.renderObject(find.byKey(buttonKey)),
         paintsExactlyCountTimes(#clipPath, 0)
     );
   });

   testWidgets('OutlineButton contributes semantics', (WidgetTester tester) async {
     final SemanticsTester semantics = SemanticsTester(tester);
     await tester.pumpWidget(
       Directionality(
         textDirection: TextDirection.ltr,
         child: Material(
           child: Center(
             child: OutlineButton(
               onPressed: () { },
               child: const Text('ABC'),
             ),
           ),
         ),
       ),
     );

     expect(semantics, hasSemantics(
       TestSemantics.root(
         children: <TestSemantics>[
           TestSemantics.rootChild(
             actions: <SemanticsAction>[
               SemanticsAction.tap,
             ],
             label: 'ABC',
             rect: Rect.fromLTRB(0.0, 0.0, 88.0, 48.0),
             transform: Matrix4.translationValues(356.0, 276.0, 0.0),
             flags: <SemanticsFlag>[
               SemanticsFlag.isButton,
               SemanticsFlag.hasEnabledState,
               SemanticsFlag.isEnabled,
             ],
           )
         ],
       ),
       ignoreId: true,
     ));

     semantics.dispose();
   });


   testWidgets('OutlineButton scales textScaleFactor', (WidgetTester tester) async {
     await tester.pumpWidget(
       Directionality(
         textDirection: TextDirection.ltr,
         child: Material(
           child: MediaQuery(
             data: const MediaQueryData(textScaleFactor: 1.0),
             child: Center(
               child: OutlineButton(
                 onPressed: () { },
                 child: const Text('ABC'),
               ),
             ),
           ),
         ),
       ),
     );

     expect(tester.getSize(find.byType(OutlineButton)), equals(const Size(88.0, 48.0)));
     expect(tester.getSize(find.byType(Text)), equals(const Size(42.0, 14.0)));

     // textScaleFactor expands text, but not button.
     await tester.pumpWidget(
       Directionality(
         textDirection: TextDirection.ltr,
         child: Material(
           child: MediaQuery(
             data: const MediaQueryData(textScaleFactor: 1.3),
             child: Center(
               child: FlatButton(
                 onPressed: () { },
                 child: const Text('ABC'),
               ),
             ),
           ),
         ),
       ),
     );

     expect(tester.getSize(find.byType(FlatButton)), equals(const Size(88.0, 48.0)));
     // Scaled text rendering is different on Linux and Mac by one pixel.
     // TODO(gspencergoog): Figure out why this is, and fix it. https://github.com/flutter/flutter/issues/12357
     expect(tester.getSize(find.byType(Text)).width, isIn(<double>[54.0, 55.0]));
     expect(tester.getSize(find.byType(Text)).height, isIn(<double>[18.0, 19.0]));

     // Set text scale large enough to expand text and button.
     await tester.pumpWidget(
       Directionality(
         textDirection: TextDirection.ltr,
         child: Material(
           child: MediaQuery(
             data: const MediaQueryData(textScaleFactor: 3.0),
             child: Center(
               child: FlatButton(
                 onPressed: () { },
                 child: const Text('ABC'),
               ),
             ),
           ),
         ),
       ),
     );

     // Scaled text rendering is different on Linux and Mac by one pixel.
     // TODO(gspencergoog): Figure out why this is, and fix it. https://github.com/flutter/flutter/issues/12357
     expect(tester.getSize(find.byType(FlatButton)).width, isIn(<double>[158.0, 159.0]));
     expect(tester.getSize(find.byType(FlatButton)).height, equals(48.0));
     expect(tester.getSize(find.byType(Text)).width, isIn(<double>[126.0, 127.0]));
     expect(tester.getSize(find.byType(Text)).height, equals(42.0));
   });

   testWidgets('OutlineButton implements debugFillProperties', (WidgetTester tester) async {
     final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
     OutlineButton(
       onPressed: () {},
       textColor: const Color(0xFF00FF00),
       disabledTextColor: const Color(0xFFFF0000),
       color: const Color(0xFF000000),
       highlightColor: const Color(0xFF1565C0),
       splashColor: const Color(0xFF9E9E9E),
       child: const Text('Hello'),
     ).debugFillProperties(builder);

     final List<String> description = builder.properties
       .where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
       .map((DiagnosticsNode node) => node.toString()).toList();

     expect(description, <String>[
       'textColor: Color(0xff00ff00)',
       'disabledTextColor: Color(0xffff0000)',
       'color: Color(0xff000000)',
       'highlightColor: Color(0xff1565c0)',
       'splashColor: Color(0xff9e9e9e)',
     ]);
   });

   testWidgets('OutlineButton pressed fillColor default', (WidgetTester tester) async {
     Widget buildFrame(ThemeData theme) {
       return MaterialApp(
         theme: theme,
         home: Scaffold(
           body: Center(
             child: OutlineButton(
               onPressed: () {},
               // Causes the button to be filled with the theme's canvasColor
               // instead of Colors.transparent before the button material's
               // elevation is animated to 2.0.
               highlightElevation: 2.0,
               child: const Text('Hello'),
             ),
           ),
         ),
       );
     }

     await tester.pumpWidget(buildFrame(ThemeData.dark()));
     final Finder button = find.byType(OutlineButton);
     final Offset center = tester.getCenter(button);

     // Default value for dark Theme.of(context).canvasColor as well as
     // the OutlineButton fill color when the button has been pressed.
     Color fillColor = Colors.grey[850];

     // Initially the interior of the button is transparent.
     expect(button, paints..path(color: fillColor.withAlpha(0x00)));

     // Tap-press gesture on the button triggers the fill animation.
     TestGesture gesture = await tester.startGesture(center);
     await tester.pump(); // Start the button fill animation.
     await tester.pump(const Duration(milliseconds: 200)); // Animation is complete.
     expect(button, paints..path(color: fillColor.withAlpha(0xFF)));

     // Tap gesture completes, button returns to its initial configuration.
     await gesture.up();
     await tester.pumpAndSettle();
     expect(button,  paints..path(color: fillColor.withAlpha(0x00)));

     await tester.pumpWidget(buildFrame(ThemeData.light()));
     await tester.pumpAndSettle(); // Finish the theme change animation.

     // Default value for light Theme.of(context).canvasColor as well as
     // the OutlineButton fill color when the button has been pressed.
     fillColor = Colors.grey[50];

     // Initially the interior of the button is transparent.
     expect(button, paints..path(color: fillColor.withAlpha(0x00)));

     // Tap-press gesture on the button triggers the fill animation.
     gesture = await tester.startGesture(center);
     await tester.pump(); // Start the button fill animation.
     await tester.pump(const Duration(milliseconds: 200)); // Animation is complete.
     expect(button, paints..path(color: fillColor.withAlpha(0xFF)));

     // Tap gesture completes, button returns to its initial configuration.
     await gesture.up();
     await tester.pumpAndSettle();
     expect(button,  paints..path(color: fillColor.withAlpha(0x00)));
   });
 }
	// Copyright 2018 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/material.dart';
	import 'package:flutter_test/flutter_test.dart';
	import 'package:flutter/rendering.dart';

	import '../rendering/mock_canvas.dart';
	import '../widgets/semantics_tester.dart';

	void main() {
	testWidgets('Outline button responds to tap when enabled', (WidgetTester tester) async {
	int pressedCount = 0;

	Widget buildFrame(VoidCallback onPressed) {
	return Directionality(
	textDirection: TextDirection.ltr,
	child: Theme(
	data: ThemeData(),
	child: Center(
	child: OutlineButton(onPressed: onPressed),
	),
	),
	);
	}

	await tester.pumpWidget(
	buildFrame(() { pressedCount += 1; }),
	);
	expect(tester.widget<OutlineButton>(find.byType(OutlineButton)).enabled, true);
	await tester.tap(find.byType(OutlineButton));
	await tester.pumpAndSettle();
	expect(pressedCount, 1);

	await tester.pumpWidget(
	buildFrame(null),
	);
	final Finder outlineButton = find.byType(OutlineButton);
	expect(tester.widget<OutlineButton>(outlineButton).enabled, false);
	await tester.tap(outlineButton);
	await tester.pumpAndSettle();
	expect(pressedCount, 1);
	});

	testWidgets('Outline button doesn\'t crash if disabled during a gesture', (WidgetTester tester) async {
	Widget buildFrame(VoidCallback onPressed) {
	return Directionality(
	textDirection: TextDirection.ltr,
	child: Theme(
	data: ThemeData(),
	child: Center(
	child: OutlineButton(onPressed: onPressed),
	),
	),
	);
	}

	await tester.pumpWidget(buildFrame(() { }));
	await tester.press(find.byType(OutlineButton));
	await tester.pumpAndSettle();
	await tester.pumpWidget(buildFrame(null));
	await tester.pumpAndSettle();
	});

	testWidgets('OutlineButton shape and border component overrides', (WidgetTester tester) async {
	const Color fillColor = Color(0xFF00FF00);
	const Color borderColor = Color(0xFFFF0000);
	const Color highlightedBorderColor = Color(0xFF0000FF);
	const Color disabledBorderColor = Color(0xFFFF00FF);
	const double borderWidth = 4.0;

	Widget buildFrame({ VoidCallback onPressed }) {
	return Directionality(
	textDirection: TextDirection.ltr,
	child: Theme(
	data: ThemeData(materialTapTargetSize: MaterialTapTargetSize.shrinkWrap),
	child: Container(
	alignment: Alignment.topLeft,
	child: OutlineButton(
	shape: const RoundedRectangleBorder(), // default border radius is 0
	clipBehavior: Clip.antiAlias,
	color: fillColor,
	// Causes the button to be filled with the theme's canvasColor
	// instead of Colors.transparent before the button material's
	// elevation is animated to 2.0.
	highlightElevation: 2.0,
	highlightedBorderColor: highlightedBorderColor,
	disabledBorderColor: disabledBorderColor,
	borderSide: const BorderSide(
	width: borderWidth,
	color: borderColor,
	),
	onPressed: onPressed,
	child: const Text('button'),
	),
	),
	),
	);
	}

	final Rect clipRect = Rect.fromLTRB(0.0, 0.0, 116.0, 36.0);
	final Path clipPath = Path()..addRect(clipRect);

	final Finder outlineButton = find.byType(OutlineButton);

	// Pump a button with a null onPressed callback to make it disabled.
	await tester.pumpWidget(
	buildFrame(onPressed: null),
	);

	// Expect that the button is disabled and painted with the disabled border color.
	expect(tester.widget<OutlineButton>(outlineButton).enabled, false);
	expect(
	outlineButton,
	paints
	..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
	..path(color: disabledBorderColor, strokeWidth: borderWidth));

	// Pump a new button with a no-op onPressed callback to make it enabled.
	await tester.pumpWidget(
	buildFrame(onPressed: () { }),
	);

	// Wait for the border color to change from disabled to enabled.
	await tester.pumpAndSettle();

	// Expect that the button is enabled and painted with the enabled border color.
	expect(tester.widget<OutlineButton>(outlineButton).enabled, true);
	expect(
	outlineButton,
	paints
	// initially the interior of the button is transparent
	..path(color: fillColor.withAlpha(0x00))
	..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
	..path(color: borderColor, strokeWidth: borderWidth));

	final Offset center = tester.getCenter(outlineButton);
	final TestGesture gesture = await tester.startGesture(center);
	await tester.pump(); // start gesture
	// Wait for the border's color to change to highlightedBorderColor and
	// the fillColor to become opaque.
	await tester.pump(const Duration(milliseconds: 200));
	expect(
	outlineButton,
	paints
	..path(color: fillColor.withAlpha(0xFF))
	..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
	..path(color: highlightedBorderColor, strokeWidth: borderWidth));

	// Tap gesture completes, button returns to its initial configuration.
	await gesture.up();
	await tester.pumpAndSettle();
	expect(
	outlineButton,
	paints
	..path(color: fillColor.withAlpha(0x00))
	..clipPath(pathMatcher: coversSameAreaAs(clipPath, areaToCompare: clipRect.inflate(10.0)))
	..path(color: borderColor, strokeWidth: borderWidth));
	});

	testWidgets('OutlineButton has no clip by default', (WidgetTester tester) async {
	final GlobalKey buttonKey = GlobalKey();
	await tester.pumpWidget(
	Directionality(
	textDirection: TextDirection.ltr,
	child: Material(
	child: Center(
	child: OutlineButton(
	key: buttonKey,
	onPressed: () { },
	child: const Text('ABC'),
	),
	),
	),
	),
	);

	expect(
	tester.renderObject(find.byKey(buttonKey)),
	paintsExactlyCountTimes(#clipPath, 0)
	);
	});

	testWidgets('OutlineButton contributes semantics', (WidgetTester tester) async {
	final SemanticsTester semantics = SemanticsTester(tester);
	await tester.pumpWidget(
	Directionality(
	textDirection: TextDirection.ltr,
	child: Material(
	child: Center(
	child: OutlineButton(
	onPressed: () { },
	child: const Text('ABC'),
	),
	),
	),
	),
	);

	expect(semantics, hasSemantics(
	TestSemantics.root(
	children: <TestSemantics>[
	TestSemantics.rootChild(
	actions: <SemanticsAction>[
	SemanticsAction.tap,
	],
	label: 'ABC',
	rect: Rect.fromLTRB(0.0, 0.0, 88.0, 48.0),
	transform: Matrix4.translationValues(356.0, 276.0, 0.0),
	flags: <SemanticsFlag>[
	SemanticsFlag.isButton,
	SemanticsFlag.hasEnabledState,
	SemanticsFlag.isEnabled,
	],
	)
	],
	),
	ignoreId: true,
	));

	semantics.dispose();
	});


	testWidgets('OutlineButton scales textScaleFactor', (WidgetTester tester) async {
	await tester.pumpWidget(
	Directionality(
	textDirection: TextDirection.ltr,
	child: Material(
	child: MediaQuery(
	data: const MediaQueryData(textScaleFactor: 1.0),
	child: Center(
	child: OutlineButton(
	onPressed: () { },
	child: const Text('ABC'),
	),
	),
	),
	),
	),
	);

	expect(tester.getSize(find.byType(OutlineButton)), equals(const Size(88.0, 48.0)));
	expect(tester.getSize(find.byType(Text)), equals(const Size(42.0, 14.0)));

	// textScaleFactor expands text, but not button.
	await tester.pumpWidget(
	Directionality(
	textDirection: TextDirection.ltr,
	child: Material(
	child: MediaQuery(
	data: const MediaQueryData(textScaleFactor: 1.3),
	child: Center(
	child: FlatButton(
	onPressed: () { },
	child: const Text('ABC'),
	),
	),
	),
	),
	),
	);

	expect(tester.getSize(find.byType(FlatButton)), equals(const Size(88.0, 48.0)));
	// Scaled text rendering is different on Linux and Mac by one pixel.
	// TODO(gspencergoog): Figure out why this is, and fix it. https://github.com/flutter/flutter/issues/12357
	expect(tester.getSize(find.byType(Text)).width, isIn(<double>[54.0, 55.0]));
	expect(tester.getSize(find.byType(Text)).height, isIn(<double>[18.0, 19.0]));

	// Set text scale large enough to expand text and button.
	await tester.pumpWidget(
	Directionality(
	textDirection: TextDirection.ltr,
	child: Material(
	child: MediaQuery(
	data: const MediaQueryData(textScaleFactor: 3.0),
	child: Center(
	child: FlatButton(
	onPressed: () { },
	child: const Text('ABC'),
	),
	),
	),
	),
	),
	);

	// Scaled text rendering is different on Linux and Mac by one pixel.
	// TODO(gspencergoog): Figure out why this is, and fix it. https://github.com/flutter/flutter/issues/12357
	expect(tester.getSize(find.byType(FlatButton)).width, isIn(<double>[158.0, 159.0]));
	expect(tester.getSize(find.byType(FlatButton)).height, equals(48.0));
	expect(tester.getSize(find.byType(Text)).width, isIn(<double>[126.0, 127.0]));
	expect(tester.getSize(find.byType(Text)).height, equals(42.0));
	});

	testWidgets('OutlineButton implements debugFillProperties', (WidgetTester tester) async {
	final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
	OutlineButton(
	onPressed: () {},
	textColor: const Color(0xFF00FF00),
	disabledTextColor: const Color(0xFFFF0000),
	color: const Color(0xFF000000),
	highlightColor: const Color(0xFF1565C0),
	splashColor: const Color(0xFF9E9E9E),
	child: const Text('Hello'),
	).debugFillProperties(builder);

	final List<String> description = builder.properties
	.where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
	.map((DiagnosticsNode node) => node.toString()).toList();

	expect(description, <String>[
	'textColor: Color(0xff00ff00)',
	'disabledTextColor: Color(0xffff0000)',
	'color: Color(0xff000000)',
	'highlightColor: Color(0xff1565c0)',
	'splashColor: Color(0xff9e9e9e)',
	]);
	});

	testWidgets('OutlineButton pressed fillColor default', (WidgetTester tester) async {
	Widget buildFrame(ThemeData theme) {
	return MaterialApp(
	theme: theme,
	home: Scaffold(
	body: Center(
	child: OutlineButton(
	onPressed: () {},
	// Causes the button to be filled with the theme's canvasColor
	// instead of Colors.transparent before the button material's
	// elevation is animated to 2.0.
	highlightElevation: 2.0,
	child: const Text('Hello'),
	),
	),
	),
	);
	}

	await tester.pumpWidget(buildFrame(ThemeData.dark()));
	final Finder button = find.byType(OutlineButton);
	final Offset center = tester.getCenter(button);

	// Default value for dark Theme.of(context).canvasColor as well as
	// the OutlineButton fill color when the button has been pressed.
	Color fillColor = Colors.grey[850];

	// Initially the interior of the button is transparent.
	expect(button, paints..path(color: fillColor.withAlpha(0x00)));

	// Tap-press gesture on the button triggers the fill animation.
	TestGesture gesture = await tester.startGesture(center);
	await tester.pump(); // Start the button fill animation.
	await tester.pump(const Duration(milliseconds: 200)); // Animation is complete.
	expect(button, paints..path(color: fillColor.withAlpha(0xFF)));

	// Tap gesture completes, button returns to its initial configuration.
	await gesture.up();
	await tester.pumpAndSettle();
	expect(button, paints..path(color: fillColor.withAlpha(0x00)));

	await tester.pumpWidget(buildFrame(ThemeData.light()));
	await tester.pumpAndSettle(); // Finish the theme change animation.

	// Default value for light Theme.of(context).canvasColor as well as
	// the OutlineButton fill color when the button has been pressed.
	fillColor = Colors.grey[50];

	// Initially the interior of the button is transparent.
	expect(button, paints..path(color: fillColor.withAlpha(0x00)));

	// Tap-press gesture on the button triggers the fill animation.
	gesture = await tester.startGesture(center);
	await tester.pump(); // Start the button fill animation.
	await tester.pump(const Duration(milliseconds: 200)); // Animation is complete.
	expect(button, paints..path(color: fillColor.withAlpha(0xFF)));

	// Tap gesture completes, button returns to its initial configuration.
	await gesture.up();
	await tester.pumpAndSettle();
	expect(button, paints..path(color: fillColor.withAlpha(0x00)));
	});
	}