packages/flutter/test/material/ink_paint_test.dart - external/github.com/flutter/flutter - Git at Google

 // Copyright 2017 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/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

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

 void main() {
   testWidgets('The InkWell widget renders an ink splash', (WidgetTester tester) async {
     const Color highlightColor = const Color(0xAAFF0000);
     const Color splashColor = const Color(0xAA0000FF);
     final BorderRadius borderRadius = new BorderRadius.circular(6.0);

     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new Container(
             width: 200.0,
             height: 60.0,
             child: new InkWell(
               borderRadius: borderRadius,
               highlightColor: highlightColor,
               splashColor: splashColor,
               onTap: () { },
             ),
           ),
         ),
       ),
     );

     final Offset center = tester.getCenter(find.byType(InkWell));
     final TestGesture gesture = await tester.startGesture(center);
     await tester.pump(); // start gesture
     await tester.pump(const Duration(milliseconds: 200)); // wait for splash to be well under way

     final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;
     expect(
       box,
       paints
         ..clipRRect(rrect: new RRect.fromLTRBR(300.0, 270.0, 500.0, 330.0, const Radius.circular(6.0)))
         ..circle(x: 400.0, y: 300.0, radius: 21.0, color: splashColor)
         ..rrect(
           rrect: new RRect.fromLTRBR(300.0, 270.0, 500.0, 330.0, const Radius.circular(6.0)),
           color: highlightColor,
         )
     );

     await gesture.up();
   });

   testWidgets('The InkWell widget renders an ink ripple', (WidgetTester tester) async {
     const Color highlightColor = const Color(0xAAFF0000);
     const Color splashColor = const Color(0xB40000FF);
     final BorderRadius borderRadius = new BorderRadius.circular(6.0);

     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new Container(
             width: 100.0,
             height: 100.0,
             child: new InkWell(
               borderRadius: borderRadius,
               highlightColor: highlightColor,
               splashColor: splashColor,
               onTap: () { },
               radius: 100.0,
               splashFactory: InkRipple.splashFactory,
             ),
           ),
         ),
       ),
     );

     final Offset tapDownOffset = tester.getTopLeft(find.byType(InkWell));
     final Offset inkWellCenter = tester.getCenter(find.byType(InkWell));
     //final TestGesture gesture = await tester.startGesture(tapDownOffset);
     await tester.tapAt(tapDownOffset);
     await tester.pump(); // start gesture

     final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;

     bool offsetsAreClose(Offset a, Offset b) => (a - b).distance < 1.0;
     bool radiiAreClose(double a, double b) => (a - b).abs() < 1.0;

     // Initially the ripple's center is where the tap occurred,
     expect(box, paints..something((Symbol method, List<dynamic> arguments) {
       if (method != #drawCircle)
         return false;
       final Offset center = arguments[0];
       final double radius = arguments[1];
       final Paint paint = arguments[2];
       if (offsetsAreClose(center, tapDownOffset) && radius == 30.0 && paint.color.alpha == 0)
         return true;
       throw '''
         Expected: center == $tapDownOffset, radius == 30.0, alpha == 0
         Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
     }));

     // The ripple fades in for 75ms. During that time its alpha is eased from
     // 0 to the splashColor's alpha value and its center moves towards the
     // center of the ink well.
     await tester.pump(const Duration(milliseconds: 50));
     expect(box, paints..something((Symbol method, List<dynamic> arguments) {
       if (method != #drawCircle)
         return false;
       final Offset center = arguments[0];
       final double radius = arguments[1];
       final Paint paint = arguments[2];
       final Offset expectedCenter = tapDownOffset + const Offset(17.0, 17.0);
       const double expectedRadius = 56.0;
       if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 120)
         return true;
       throw '''
         Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 120
         Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
     }));

     // At 75ms the ripple has fade in: it's alpha matches the splashColor's
     // alpha and its center has moved closer to the ink well's center.
     await tester.pump(const Duration(milliseconds: 25));
     expect(box, paints..something((Symbol method, List<dynamic> arguments) {
       if (method != #drawCircle)
         return false;
       final Offset center = arguments[0];
       final double radius = arguments[1];
       final Paint paint = arguments[2];
       final Offset expectedCenter = tapDownOffset + const Offset(29.0, 29.0);
       const double expectedRadius = 73.0;
       if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 180)
         return true;
       throw '''
         Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 180
         Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
     }));

     // At this point the splash radius has expanded to its limit: 5 past the
     // ink well's radius parameter. The splash center has moved to its final
     // location at the inkwell's center and the fade-out is about to start.
     // The fade-out begins at 225ms = 50ms + 25ms + 150ms.
     await tester.pump(const Duration(milliseconds: 150));
     expect(box, paints..something((Symbol method, List<dynamic> arguments) {
       if (method != #drawCircle)
         return false;
       final Offset center = arguments[0];
       final double radius = arguments[1];
       final Paint paint = arguments[2];
       final Offset expectedCenter = inkWellCenter;
       const double expectedRadius = 105.0;
       if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 180)
         return true;
       throw '''
         Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 180
         Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
     }));

     // After another 150ms the fade-out is complete.
     await tester.pump(const Duration(milliseconds: 150));
     expect(box, paints..something((Symbol method, List<dynamic> arguments) {
       if (method != #drawCircle)
         return false;
       final Offset center = arguments[0];
       final double radius = arguments[1];
       final Paint paint = arguments[2];
       final Offset expectedCenter = inkWellCenter;
       const double expectedRadius = 105.0;
       if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 0)
         return true;
       throw '''
         Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 0
         Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
     }));
   });

   testWidgets('Does the Ink widget render anything', (WidgetTester tester) async {
     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new Ink(
             color: Colors.blue,
             width: 200.0,
             height: 200.0,
             child: new InkWell(
               splashColor: Colors.green,
               onTap: () { },
             ),
           ),
         ),
       ),
     );

     final Offset center = tester.getCenter(find.byType(InkWell));
     final TestGesture gesture = await tester.startGesture(center);
     await tester.pump(); // start gesture
     await tester.pump(const Duration(milliseconds: 200)); // wait for splash to be well under way

     final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;
     expect(
       box,
       paints
         ..rect(rect: new Rect.fromLTRB(300.0, 200.0, 500.0, 400.0), color: new Color(Colors.blue.value))
         ..circle(color: new Color(Colors.green.value))
     );

     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new Ink(
             color: Colors.red,
             width: 200.0,
             height: 200.0,
             child: new InkWell(
               splashColor: Colors.green,
               onTap: () { },
             ),
           ),
         ),
       ),
     );

     expect(Material.of(tester.element(find.byType(InkWell))), same(box));

     expect(
       box,
       paints
         ..rect(rect: new Rect.fromLTRB(300.0, 200.0, 500.0, 400.0), color: new Color(Colors.red.value))
         ..circle(color: new Color(Colors.green.value))
     );

     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new InkWell( // this is at a different depth in the tree so it's now a new InkWell
             splashColor: Colors.green,
             onTap: () { },
           ),
         ),
       ),
     );

     expect(Material.of(tester.element(find.byType(InkWell))), same(box));

     expect(box, isNot(paints..rect()));
     expect(box, isNot(paints..circle()));

     await gesture.up();
   });

   testWidgets('Cancel an InkRipple that was disposed when its animation ended', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/14391
     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new Container(
             width: 100.0,
             height: 100.0,
             child: new InkWell(
               onTap: () { },
               radius: 100.0,
               splashFactory: InkRipple.splashFactory,
             ),
           ),
         ),
       ),
     );

     final Offset tapDownOffset = tester.getTopLeft(find.byType(InkWell));
     await tester.tapAt(tapDownOffset);
     await tester.pump(); // start splash
     await tester.pump(const Duration(milliseconds: 375)); // _kFadeOutDuration, in_ripple.dart

     final TestGesture gesture = await tester.startGesture(tapDownOffset);
     await tester.pump(); // start gesture
     await gesture.moveTo(const Offset(0.0, 0.0));
     await gesture.up(); // generates a tap cancel
     await tester.pumpAndSettle();
   });

   testWidgets('Cancel an InkRipple that was disposed when its animation ended', (WidgetTester tester) async {
     const Color highlightColor = const Color(0xAAFF0000);
     const Color splashColor = const Color(0xB40000FF);

     // Regression test for https://github.com/flutter/flutter/issues/14391
     await tester.pumpWidget(
       new Material(
         child: new Center(
           child: new Container(
             width: 100.0,
             height: 100.0,
             child: new InkWell(
               splashColor: splashColor,
               highlightColor: highlightColor,
               onTap: () { },
               radius: 100.0,
               splashFactory: InkRipple.splashFactory,
             ),
           ),
         ),
       ),
     );

     final Offset tapDownOffset = tester.getTopLeft(find.byType(InkWell));
     await tester.tapAt(tapDownOffset);
     await tester.pump(); // start splash
     // No delay here so _fadeInController.value=1.0 (InkRipple.dart)

     // Generate a tap cancel; Will cancel the ink splash before it started
     final TestGesture gesture = await tester.startGesture(tapDownOffset);
     await tester.pump(); // start gesture
     await gesture.moveTo(const Offset(0.0, 0.0));
     await gesture.up(); // generates a tap cancel

     final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;
     expect(box, paints..everything((Symbol method, List<dynamic> arguments) {
       if (method != #drawCircle)
         return true;
       final Paint paint = arguments[2];
       if (paint.color.alpha == 0)
         return true;
       throw 'Expected: paint.color.alpha == 0, found: ${paint.color.alpha}';
     }));
   });

 }
	// Copyright 2017 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/rendering.dart';
	import 'package:flutter_test/flutter_test.dart';

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

	void main() {
	testWidgets('The InkWell widget renders an ink splash', (WidgetTester tester) async {
	const Color highlightColor = const Color(0xAAFF0000);
	const Color splashColor = const Color(0xAA0000FF);
	final BorderRadius borderRadius = new BorderRadius.circular(6.0);

	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new Container(
	width: 200.0,
	height: 60.0,
	child: new InkWell(
	borderRadius: borderRadius,
	highlightColor: highlightColor,
	splashColor: splashColor,
	onTap: () { },
	),
	),
	),
	),
	);

	final Offset center = tester.getCenter(find.byType(InkWell));
	final TestGesture gesture = await tester.startGesture(center);
	await tester.pump(); // start gesture
	await tester.pump(const Duration(milliseconds: 200)); // wait for splash to be well under way

	final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;
	expect(
	box,
	paints
	..clipRRect(rrect: new RRect.fromLTRBR(300.0, 270.0, 500.0, 330.0, const Radius.circular(6.0)))
	..circle(x: 400.0, y: 300.0, radius: 21.0, color: splashColor)
	..rrect(
	rrect: new RRect.fromLTRBR(300.0, 270.0, 500.0, 330.0, const Radius.circular(6.0)),
	color: highlightColor,
	)
	);

	await gesture.up();
	});

	testWidgets('The InkWell widget renders an ink ripple', (WidgetTester tester) async {
	const Color highlightColor = const Color(0xAAFF0000);
	const Color splashColor = const Color(0xB40000FF);
	final BorderRadius borderRadius = new BorderRadius.circular(6.0);

	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new Container(
	width: 100.0,
	height: 100.0,
	child: new InkWell(
	borderRadius: borderRadius,
	highlightColor: highlightColor,
	splashColor: splashColor,
	onTap: () { },
	radius: 100.0,
	splashFactory: InkRipple.splashFactory,
	),
	),
	),
	),
	);

	final Offset tapDownOffset = tester.getTopLeft(find.byType(InkWell));
	final Offset inkWellCenter = tester.getCenter(find.byType(InkWell));
	//final TestGesture gesture = await tester.startGesture(tapDownOffset);
	await tester.tapAt(tapDownOffset);
	await tester.pump(); // start gesture

	final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;

	bool offsetsAreClose(Offset a, Offset b) => (a - b).distance < 1.0;
	bool radiiAreClose(double a, double b) => (a - b).abs() < 1.0;

	// Initially the ripple's center is where the tap occurred,
	expect(box, paints..something((Symbol method, List<dynamic> arguments) {
	if (method != #drawCircle)
	return false;
	final Offset center = arguments[0];
	final double radius = arguments[1];
	final Paint paint = arguments[2];
	if (offsetsAreClose(center, tapDownOffset) && radius == 30.0 && paint.color.alpha == 0)
	return true;
	throw '''
	Expected: center == $tapDownOffset, radius == 30.0, alpha == 0
	Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
	}));

	// The ripple fades in for 75ms. During that time its alpha is eased from
	// 0 to the splashColor's alpha value and its center moves towards the
	// center of the ink well.
	await tester.pump(const Duration(milliseconds: 50));
	expect(box, paints..something((Symbol method, List<dynamic> arguments) {
	if (method != #drawCircle)
	return false;
	final Offset center = arguments[0];
	final double radius = arguments[1];
	final Paint paint = arguments[2];
	final Offset expectedCenter = tapDownOffset + const Offset(17.0, 17.0);
	const double expectedRadius = 56.0;
	if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 120)
	return true;
	throw '''
	Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 120
	Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
	}));

	// At 75ms the ripple has fade in: it's alpha matches the splashColor's
	// alpha and its center has moved closer to the ink well's center.
	await tester.pump(const Duration(milliseconds: 25));
	expect(box, paints..something((Symbol method, List<dynamic> arguments) {
	if (method != #drawCircle)
	return false;
	final Offset center = arguments[0];
	final double radius = arguments[1];
	final Paint paint = arguments[2];
	final Offset expectedCenter = tapDownOffset + const Offset(29.0, 29.0);
	const double expectedRadius = 73.0;
	if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 180)
	return true;
	throw '''
	Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 180
	Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
	}));

	// At this point the splash radius has expanded to its limit: 5 past the
	// ink well's radius parameter. The splash center has moved to its final
	// location at the inkwell's center and the fade-out is about to start.
	// The fade-out begins at 225ms = 50ms + 25ms + 150ms.
	await tester.pump(const Duration(milliseconds: 150));
	expect(box, paints..something((Symbol method, List<dynamic> arguments) {
	if (method != #drawCircle)
	return false;
	final Offset center = arguments[0];
	final double radius = arguments[1];
	final Paint paint = arguments[2];
	final Offset expectedCenter = inkWellCenter;
	const double expectedRadius = 105.0;
	if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 180)
	return true;
	throw '''
	Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 180
	Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
	}));

	// After another 150ms the fade-out is complete.
	await tester.pump(const Duration(milliseconds: 150));
	expect(box, paints..something((Symbol method, List<dynamic> arguments) {
	if (method != #drawCircle)
	return false;
	final Offset center = arguments[0];
	final double radius = arguments[1];
	final Paint paint = arguments[2];
	final Offset expectedCenter = inkWellCenter;
	const double expectedRadius = 105.0;
	if (offsetsAreClose(center, expectedCenter) && radiiAreClose(radius, expectedRadius) && paint.color.alpha == 0)
	return true;
	throw '''
	Expected: center == $expectedCenter, radius == $expectedRadius, alpha == 0
	Found: center == $center radius == $radius alpha == ${paint.color.alpha}''';
	}));
	});

	testWidgets('Does the Ink widget render anything', (WidgetTester tester) async {
	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new Ink(
	color: Colors.blue,
	width: 200.0,
	height: 200.0,
	child: new InkWell(
	splashColor: Colors.green,
	onTap: () { },
	),
	),
	),
	),
	);

	final Offset center = tester.getCenter(find.byType(InkWell));
	final TestGesture gesture = await tester.startGesture(center);
	await tester.pump(); // start gesture
	await tester.pump(const Duration(milliseconds: 200)); // wait for splash to be well under way

	final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;
	expect(
	box,
	paints
	..rect(rect: new Rect.fromLTRB(300.0, 200.0, 500.0, 400.0), color: new Color(Colors.blue.value))
	..circle(color: new Color(Colors.green.value))
	);

	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new Ink(
	color: Colors.red,
	width: 200.0,
	height: 200.0,
	child: new InkWell(
	splashColor: Colors.green,
	onTap: () { },
	),
	),
	),
	),
	);

	expect(Material.of(tester.element(find.byType(InkWell))), same(box));

	expect(
	box,
	paints
	..rect(rect: new Rect.fromLTRB(300.0, 200.0, 500.0, 400.0), color: new Color(Colors.red.value))
	..circle(color: new Color(Colors.green.value))
	);

	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new InkWell( // this is at a different depth in the tree so it's now a new InkWell
	splashColor: Colors.green,
	onTap: () { },
	),
	),
	),
	);

	expect(Material.of(tester.element(find.byType(InkWell))), same(box));

	expect(box, isNot(paints..rect()));
	expect(box, isNot(paints..circle()));

	await gesture.up();
	});

	testWidgets('Cancel an InkRipple that was disposed when its animation ended', (WidgetTester tester) async {
	// Regression test for https://github.com/flutter/flutter/issues/14391
	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new Container(
	width: 100.0,
	height: 100.0,
	child: new InkWell(
	onTap: () { },
	radius: 100.0,
	splashFactory: InkRipple.splashFactory,
	),
	),
	),
	),
	);

	final Offset tapDownOffset = tester.getTopLeft(find.byType(InkWell));
	await tester.tapAt(tapDownOffset);
	await tester.pump(); // start splash
	await tester.pump(const Duration(milliseconds: 375)); // _kFadeOutDuration, in_ripple.dart

	final TestGesture gesture = await tester.startGesture(tapDownOffset);
	await tester.pump(); // start gesture
	await gesture.moveTo(const Offset(0.0, 0.0));
	await gesture.up(); // generates a tap cancel
	await tester.pumpAndSettle();
	});

	testWidgets('Cancel an InkRipple that was disposed when its animation ended', (WidgetTester tester) async {
	const Color highlightColor = const Color(0xAAFF0000);
	const Color splashColor = const Color(0xB40000FF);

	// Regression test for https://github.com/flutter/flutter/issues/14391
	await tester.pumpWidget(
	new Material(
	child: new Center(
	child: new Container(
	width: 100.0,
	height: 100.0,
	child: new InkWell(
	splashColor: splashColor,
	highlightColor: highlightColor,
	onTap: () { },
	radius: 100.0,
	splashFactory: InkRipple.splashFactory,
	),
	),
	),
	),
	);

	final Offset tapDownOffset = tester.getTopLeft(find.byType(InkWell));
	await tester.tapAt(tapDownOffset);
	await tester.pump(); // start splash
	// No delay here so _fadeInController.value=1.0 (InkRipple.dart)

	// Generate a tap cancel; Will cancel the ink splash before it started
	final TestGesture gesture = await tester.startGesture(tapDownOffset);
	await tester.pump(); // start gesture
	await gesture.moveTo(const Offset(0.0, 0.0));
	await gesture.up(); // generates a tap cancel

	final RenderBox box = Material.of(tester.element(find.byType(InkWell))) as dynamic;
	expect(box, paints..everything((Symbol method, List<dynamic> arguments) {
	if (method != #drawCircle)
	return true;
	final Paint paint = arguments[2];
	if (paint.color.alpha == 0)
	return true;
	throw 'Expected: paint.color.alpha == 0, found: ${paint.color.alpha}';
	}));
	});

	}