transitions_test.dart 15.8 KB
Newer Older
Ian Hickson's avatar
Ian Hickson committed
1
// Copyright 2014 The Flutter Authors. All rights reserved.
2 3 4
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

5
import 'dart:math' as math;
6
import 'dart:ui' show Rect;
7

8
import 'package:flutter/material.dart';
9
import 'package:flutter/rendering.dart';
10
import 'package:flutter_test/flutter_test.dart';
11 12 13

void main() {
  testWidgets('toString control test', (WidgetTester tester) async {
14
    const Widget widget = FadeTransition(
15
      opacity: kAlwaysCompleteAnimation,
16
      child: Text('Ready', textDirection: TextDirection.ltr),
17 18 19
    );
    expect(widget.toString, isNot(throwsException));
  });
20

21
  group('DecoratedBoxTransition test', () {
22 23
    final DecorationTween decorationTween = DecorationTween(
      begin: BoxDecoration(
24
        color: const Color(0xFFFFFFFF),
25
        border: Border.all(
26 27 28
          width: 4.0,
        ),
        borderRadius: BorderRadius.zero,
29 30
        boxShadow: const <BoxShadow> [BoxShadow(
          color: Color(0x66000000),
31 32 33 34
          blurRadius: 10.0,
          spreadRadius: 4.0,
        )],
      ),
35
      end: BoxDecoration(
36
        color: const Color(0xFF000000),
37
        border: Border.all(
38 39
          color: const Color(0xFF202020),
        ),
40
        borderRadius: const BorderRadius.all(Radius.circular(10.0)),
41 42 43 44
        // No shadow.
      ),
    );

45
    late AnimationController controller;
46 47

    setUp(() {
48
      controller = AnimationController(vsync: const TestVSync());
49 50
    });

51 52 53 54 55
    testWidgets('decoration test', (WidgetTester tester) async {
      final DecoratedBoxTransition transitionUnderTest =
      DecoratedBoxTransition(
        decoration: decorationTween.animate(controller),
        child: const Text(
56
          "Doesn't matter",
57 58 59 60 61 62 63 64 65
          textDirection: TextDirection.ltr,
        ),
      );

      await tester.pumpWidget(transitionUnderTest);
      RenderDecoratedBox actualBox = tester.renderObject(find.byType(DecoratedBox));
      BoxDecoration actualDecoration = actualBox.decoration as BoxDecoration;

      expect(actualDecoration.color, const Color(0xFFFFFFFF));
66 67 68
      expect(actualDecoration.boxShadow![0].blurRadius, 10.0);
      expect(actualDecoration.boxShadow![0].spreadRadius, 4.0);
      expect(actualDecoration.boxShadow![0].color, const Color(0x66000000));
69 70 71 72 73 74 75 76

      controller.value = 0.5;

      await tester.pump();
      actualBox = tester.renderObject(find.byType(DecoratedBox));
      actualDecoration = actualBox.decoration as BoxDecoration;

      expect(actualDecoration.color, const Color(0xFF7F7F7F));
Dan Field's avatar
Dan Field committed
77
      expect(actualDecoration.border, isA<Border>());
78
      final Border border = actualDecoration.border! as Border;
79 80 81
      expect(border.left.width, 2.5);
      expect(border.left.style, BorderStyle.solid);
      expect(border.left.color, const Color(0xFF101010));
82
      expect(actualDecoration.borderRadius, const BorderRadius.all(Radius.circular(5.0)));
83
      expect(actualDecoration.shape, BoxShape.rectangle);
84 85
      expect(actualDecoration.boxShadow![0].blurRadius, 5.0);
      expect(actualDecoration.boxShadow![0].spreadRadius, 2.0);
86
      // Scaling a shadow doesn't change the color.
87
      expect(actualDecoration.boxShadow![0].color, const Color(0x66000000));
88 89 90 91 92 93 94 95 96 97

      controller.value = 1.0;

      await tester.pump();
      actualBox = tester.renderObject(find.byType(DecoratedBox));
      actualDecoration = actualBox.decoration as BoxDecoration;

      expect(actualDecoration.color, const Color(0xFF000000));
      expect(actualDecoration.boxShadow, null);
    });
98 99

    testWidgets('animations work with curves test', (WidgetTester tester) async {
100
      final Animation<Decoration> curvedDecorationAnimation =
101 102 103 104 105 106 107 108 109
        decorationTween.animate(CurvedAnimation(
        parent: controller,
        curve: Curves.easeOut,
      ));

      final DecoratedBoxTransition transitionUnderTest = DecoratedBoxTransition(
        decoration: curvedDecorationAnimation,
        position: DecorationPosition.foreground,
        child: const Text(
110
          "Doesn't matter",
111 112 113
          textDirection: TextDirection.ltr,
        ),
      );
114 115

      await tester.pumpWidget(transitionUnderTest);
116 117

      RenderDecoratedBox actualBox = tester.renderObject(find.byType(DecoratedBox));
118
      BoxDecoration actualDecoration = actualBox.decoration as BoxDecoration;
119

120
      expect(actualDecoration.color, const Color(0xFFFFFFFF));
121 122 123
      expect(actualDecoration.boxShadow![0].blurRadius, 10.0);
      expect(actualDecoration.boxShadow![0].spreadRadius, 4.0);
      expect(actualDecoration.boxShadow![0].color, const Color(0x66000000));
124 125 126 127 128

      controller.value = 0.5;

      await tester.pump();
      actualBox = tester.renderObject(find.byType(DecoratedBox));
129
      actualDecoration = actualBox.decoration as BoxDecoration;
130

131
      // Same as the test above but the values should be much closer to the
132
      // tween's end values given the easeOut curve.
133
      expect(actualDecoration.color, const Color(0xFF505050));
Dan Field's avatar
Dan Field committed
134
      expect(actualDecoration.border, isA<Border>());
135
      final Border border = actualDecoration.border! as Border;
136
      expect(border.left.width, moreOrLessEquals(1.9, epsilon: 0.1));
Ian Hickson's avatar
Ian Hickson committed
137 138
      expect(border.left.style, BorderStyle.solid);
      expect(border.left.color, const Color(0xFF151515));
139
      expect(actualDecoration.borderRadius!.resolve(TextDirection.ltr).topLeft.x, moreOrLessEquals(6.8, epsilon: 0.1));
140
      expect(actualDecoration.shape, BoxShape.rectangle);
141 142
      expect(actualDecoration.boxShadow![0].blurRadius, moreOrLessEquals(3.1, epsilon: 0.1));
      expect(actualDecoration.boxShadow![0].spreadRadius, moreOrLessEquals(1.2, epsilon: 0.1));
143
      // Scaling a shadow doesn't change the color.
144
      expect(actualDecoration.boxShadow![0].color, const Color(0x66000000));
145 146
    });
  });
147 148

  testWidgets('AlignTransition animates', (WidgetTester tester) async {
149 150
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Animation<Alignment> alignmentTween = AlignmentTween(
151 152
      begin: Alignment.centerLeft,
      end: Alignment.bottomRight,
153
    ).animate(controller);
154
    final Widget widget = AlignTransition(
155 156 157 158 159 160 161 162
      alignment: alignmentTween,
      child: const Text('Ready', textDirection: TextDirection.ltr),
    );

    await tester.pumpWidget(widget);

    final RenderPositionedBox actualPositionedBox = tester.renderObject(find.byType(Align));

163
    Alignment actualAlignment = actualPositionedBox.alignment as Alignment;
164
    expect(actualAlignment, Alignment.centerLeft);
165 166 167

    controller.value = 0.5;
    await tester.pump();
168
    actualAlignment = actualPositionedBox.alignment as Alignment;
169 170 171
    expect(actualAlignment, const Alignment(0.0, 0.5));
  });

172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
  testWidgets('RelativePositionedTransition animates', (WidgetTester tester) async {
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Animation<Rect?> rectTween = RectTween(
      begin: const Rect.fromLTWH(0, 0, 30, 40),
      end: const Rect.fromLTWH(100, 200, 100, 200),
    ).animate(controller);
    final Widget widget = Directionality(
      textDirection: TextDirection.rtl,
      child: Stack(
        alignment: Alignment.centerLeft,
        children: <Widget>[
          RelativePositionedTransition(
            size: const Size(200, 300),
            rect: rectTween,
            child: const Placeholder(),
          ),
        ],
      ),
    );

    await tester.pumpWidget(widget);

    final Positioned actualPositioned = tester.widget(find.byType(Positioned));
    final RenderBox renderBox = tester.renderObject(find.byType(Placeholder));

    Rect actualRect = Rect.fromLTRB(
      actualPositioned.left!,
      actualPositioned.top!,
      actualPositioned.right ?? 0.0,
      actualPositioned.bottom ?? 0.0,
    );
    expect(actualRect, equals(const Rect.fromLTRB(0, 0, 170, 260)));
    expect(renderBox.size, equals(const Size(630, 340)));

    controller.value = 0.5;
    await tester.pump();
    actualRect = Rect.fromLTRB(
      actualPositioned.left!,
      actualPositioned.top!,
      actualPositioned.right ?? 0.0,
      actualPositioned.bottom ?? 0.0,
    );
    expect(actualRect, equals(const Rect.fromLTWH(0, 0, 170, 260)));
    expect(renderBox.size, equals(const Size(665, 420)));
  });

218
  testWidgets('AlignTransition keeps width and height factors', (WidgetTester tester) async {
219 220
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Animation<Alignment> alignmentTween = AlignmentTween(
221 222
      begin: Alignment.centerLeft,
      end: Alignment.bottomRight,
223
    ).animate(controller);
224
    final Widget widget = AlignTransition(
225 226 227
      alignment: alignmentTween,
      widthFactor: 0.3,
      heightFactor: 0.4,
228
      child: const Text('Ready', textDirection: TextDirection.ltr),
229 230 231 232 233 234 235 236 237
    );

    await tester.pumpWidget(widget);

    final Align actualAlign = tester.widget(find.byType(Align));

    expect(actualAlign.widthFactor, 0.3);
    expect(actualAlign.heightFactor, 0.4);
  });
238 239

  testWidgets('SizeTransition clamps negative size factors - vertical axis', (WidgetTester tester) async {
240 241
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Animation<double> animation = Tween<double>(begin: -1.0, end: 1.0).animate(controller);
242

243
    final Widget widget =  Directionality(
244 245 246 247 248 249
      textDirection: TextDirection.ltr,
      child: SizeTransition(
        sizeFactor: animation,
        child: const Text('Ready'),
      ),
    );
250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269

    await tester.pumpWidget(widget);

    final RenderPositionedBox actualPositionedBox = tester.renderObject(find.byType(Align));
    expect(actualPositionedBox.heightFactor, 0.0);

    controller.value = 0.0;
    await tester.pump();
    expect(actualPositionedBox.heightFactor, 0.0);

    controller.value = 0.75;
    await tester.pump();
    expect(actualPositionedBox.heightFactor, 0.5);

    controller.value = 1.0;
    await tester.pump();
    expect(actualPositionedBox.heightFactor, 1.0);
  });

  testWidgets('SizeTransition clamps negative size factors - horizontal axis', (WidgetTester tester) async {
270 271
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Animation<double> animation = Tween<double>(begin: -1.0, end: 1.0).animate(controller);
272

273
    final Widget widget =  Directionality(
274 275 276 277 278 279 280
      textDirection: TextDirection.ltr,
      child: SizeTransition(
        axis: Axis.horizontal,
        sizeFactor: animation,
        child: const Text('Ready'),
      ),
    );
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298

    await tester.pumpWidget(widget);

    final RenderPositionedBox actualPositionedBox = tester.renderObject(find.byType(Align));
    expect(actualPositionedBox.widthFactor, 0.0);

    controller.value = 0.0;
    await tester.pump();
    expect(actualPositionedBox.widthFactor, 0.0);

    controller.value = 0.75;
    await tester.pump();
    expect(actualPositionedBox.widthFactor, 0.5);

    controller.value = 1.0;
    await tester.pump();
    expect(actualPositionedBox.widthFactor, 1.0);
  });
299 300

  testWidgets('RotationTransition animates', (WidgetTester tester) async {
301 302
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Widget widget = RotationTransition(
303 304
      alignment: Alignment.topRight,
      turns: controller,
305 306 307 308
      child: const Text(
        'Rotation',
        textDirection: TextDirection.ltr,
      ),
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328
    );

    await tester.pumpWidget(widget);
    Transform actualRotatedBox = tester.widget(find.byType(Transform));
    Matrix4 actualTurns = actualRotatedBox.transform;
    expect(actualTurns, equals(Matrix4.rotationZ(0.0)));

    controller.value = 0.5;
    await tester.pump();
    actualRotatedBox = tester.widget(find.byType(Transform));
    actualTurns = actualRotatedBox.transform;
    expect(actualTurns, Matrix4.rotationZ(math.pi));

    controller.value = 0.75;
    await tester.pump();
    actualRotatedBox = tester.widget(find.byType(Transform));
    actualTurns = actualRotatedBox.transform;
    expect(actualTurns, Matrix4.rotationZ(math.pi * 1.5));
  });

329
  testWidgets('RotationTransition maintains chosen alignment during animation', (WidgetTester tester) async {
330 331
    final AnimationController controller = AnimationController(vsync: const TestVSync());
    final Widget widget = RotationTransition(
332 333 334 335 336 337
      alignment: Alignment.topRight,
      turns: controller,
      child: const Text('Rotation', textDirection: TextDirection.ltr),
    );

    await tester.pumpWidget(widget);
338
    RotationTransition actualRotatedBox = tester.widget(find.byType(RotationTransition));
339
    Alignment actualAlignment = actualRotatedBox.alignment;
340
    expect(actualAlignment, Alignment.topRight);
341 342 343 344 345

    controller.value = 0.5;
    await tester.pump();
    actualRotatedBox = tester.widget(find.byType(RotationTransition));
    actualAlignment = actualRotatedBox.alignment;
346
    expect(actualAlignment, Alignment.topRight);
347
  });
348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422

  group('FadeTransition', () {
    double _getOpacity(WidgetTester tester, String textValue) {
      final FadeTransition opacityWidget = tester.widget<FadeTransition>(
        find.ancestor(
          of: find.text(textValue),
          matching: find.byType(FadeTransition),
        ).first,
      );
      return opacityWidget.opacity.value;
    }
    testWidgets('animates', (WidgetTester tester) async {
      final AnimationController controller = AnimationController(vsync: const TestVSync());
      final Animation<double> animation = Tween<double>(begin: 0.0, end: 1.0).animate(controller);
      final Widget widget =  Directionality(
        textDirection: TextDirection.ltr,
        child: FadeTransition(
          opacity: animation,
          child: const Text('Fade In'),
        ),
      );

      await tester.pumpWidget(widget);

      expect(_getOpacity(tester, 'Fade In'), 0.0);

      controller.value = 0.25;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 0.25);

      controller.value = 0.5;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 0.5);

      controller.value = 0.75;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 0.75);

      controller.value = 1.0;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 1.0);
    });
  });

  group('SliverFadeTransition', () {
    double _getOpacity(WidgetTester tester, String textValue) {
      final SliverFadeTransition opacityWidget = tester.widget<SliverFadeTransition>(
        find.ancestor(
          of: find.text(textValue),
          matching: find.byType(SliverFadeTransition),
        ).first,
      );
      return opacityWidget.opacity.value;
    }
    testWidgets('animates', (WidgetTester tester) async {
      final AnimationController controller = AnimationController(vsync: const TestVSync());
      final Animation<double> animation = Tween<double>(begin: 0.0, end: 1.0).animate(controller);
      final Widget widget = Localizations(
        locale: const Locale('en', 'us'),
        delegates: const <LocalizationsDelegate<dynamic>>[
          DefaultWidgetsLocalizations.delegate,
          DefaultMaterialLocalizations.delegate,
        ],
        child: Directionality(
          textDirection: TextDirection.ltr,
          child: MediaQuery(
            data: const MediaQueryData(),
            child: CustomScrollView(
              slivers: <Widget>[
                SliverFadeTransition(
                  opacity: animation,
                  sliver: const SliverToBoxAdapter(
                    child: Text('Fade In'),
                  ),
                ),
423 424 425 426
              ],
            ),
          ),
        ),
427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449
      );

      await tester.pumpWidget(widget);

      expect(_getOpacity(tester, 'Fade In'), 0.0);

      controller.value = 0.25;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 0.25);

      controller.value = 0.5;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 0.5);

      controller.value = 0.75;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 0.75);

      controller.value = 1.0;
      await tester.pump();
      expect(_getOpacity(tester, 'Fade In'), 1.0);
    });
  });
450
}