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angular-docs-cn/modules/@angular/animation/test/dsl/animation_spec.ts

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refactor(animations): introduce @angular/animation module (#14351) PR Close: #14351
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {StyleData} from '../../src/common/style_data';
import {Animation} from '../../src/dsl/animation';
import {AUTO_STYLE, AnimationMetadata, animate, group, keyframes, sequence, style} from '../../src/dsl/animation_metadata';
import {AnimationTimelineInstruction} from '../../src/dsl/animation_timeline_instruction';
import {validateAnimationSequence} from '../../src/dsl/animation_validator_visitor';
export function main() {
describe('Animation', () => {
describe('validation', () => {
it('should throw an error if one or more but not all keyframes() styles contain offsets',
() => {
const steps = animate(1000, keyframes([
style({opacity: 0}),
style({opacity: 1, offset: 1}),
]));
expect(() => { validateAndThrowAnimationSequence(steps); })
.toThrowError(
/Not all style\(\) steps within the declared keyframes\(\) contain offsets/);
});
it('should throw an error if not all offsets are between 0 and 1', () => {
let steps = animate(1000, keyframes([
style({opacity: 0, offset: -1}),
style({opacity: 1, offset: 1}),
]));
expect(() => {
validateAndThrowAnimationSequence(steps);
}).toThrowError(/Please ensure that all keyframe offsets are between 0 and 1/);
steps = animate(1000, keyframes([
style({opacity: 0, offset: 0}),
style({opacity: 1, offset: 1.1}),
]));
expect(() => {
validateAndThrowAnimationSequence(steps);
}).toThrowError(/Please ensure that all keyframe offsets are between 0 and 1/);
});
it('should throw an error if a smaller offset shows up after a bigger one', () => {
let steps = animate(1000, keyframes([
style({opacity: 0, offset: 1}),
style({opacity: 1, offset: 0}),
]));
expect(() => {
validateAndThrowAnimationSequence(steps);
}).toThrowError(/Please ensure that all keyframe offsets are in order/);
});
it('should throw an error if any styles overlap during parallel animations', () => {
const steps = group([
sequence([
// 0 -> 2000ms
style({opacity: 0}), animate('500ms', style({opacity: .25})),
animate('500ms', style({opacity: .5})), animate('500ms', style({opacity: .75})),
animate('500ms', style({opacity: 1}))
]),
animate('1s 500ms', keyframes([
// 0 -> 1500ms
style({width: 0}),
style({opacity: 1, width: 1000}),
]))
]);
expect(() => { validateAndThrowAnimationSequence(steps); })
.toThrowError(
/The CSS property "opacity" that exists between the times of "0ms" and "2000ms" is also being animated in a parallel animation between the times of "0ms" and "1500ms"/);
});
it('should throw an error if an animation time is invalid', () => {
const steps = [animate('500xs', style({opacity: 1}))];
expect(() => {
validateAndThrowAnimationSequence(steps);
}).toThrowError(/The provided timing value "500xs" is invalid/);
const steps2 = [animate('500ms 500ms 500ms ease-out', style({opacity: 1}))];
expect(() => {
validateAndThrowAnimationSequence(steps2);
}).toThrowError(/The provided timing value "500ms 500ms 500ms ease-out" is invalid/);
});
});
describe('keyframe building', () => {
describe('style() / animate()', () => {
it('should produce a balanced series of keyframes given a sequence of animate steps',
() => {
const steps = [
style({width: 0}), animate(1000, style({height: 50})),
animate(1000, style({width: 100})), animate(1000, style({height: 150})),
animate(1000, style({width: 200}))
];
const players = invokeAnimationSequence(steps);
expect(players[0].keyframes).toEqual([
{height: AUTO_STYLE, width: 0, offset: 0},
{height: 50, width: 0, offset: .25},
{height: 50, width: 100, offset: .5},
{height: 150, width: 100, offset: .75},
{height: 150, width: 200, offset: 1},
]);
});
it('should fill in missing starting steps when a starting `style()` value is not used',
() => {
const steps = [animate(1000, style({width: 999}))];
const players = invokeAnimationSequence(steps);
expect(players[0].keyframes).toEqual([
{width: AUTO_STYLE, offset: 0}, {width: 999, offset: 1}
]);
});
it('should merge successive style() calls together before an animate() call', () => {
const steps = [
style({width: 0}), style({height: 0}), style({width: 200}), style({opacity: 0}),
animate(1000, style({width: 100, height: 400, opacity: 1}))
];
const players = invokeAnimationSequence(steps);
expect(players[0].keyframes).toEqual([
{width: 200, height: 0, opacity: 0, offset: 0},
{width: 100, height: 400, opacity: 1, offset: 1}
]);
});
it('should not merge in successive style() calls to the previous animate() keyframe',
() => {
const steps = [
style({opacity: 0}), animate(1000, style({opacity: .5})), style({opacity: .6}),
animate(1000, style({opacity: 1}))
];
const players = invokeAnimationSequence(steps);
const keyframes = humanizeOffsets(players[0].keyframes, 4);
expect(keyframes).toEqual([
{opacity: 0, offset: 0},
{opacity: .5, offset: .4998},
{opacity: .6, offset: .5002},
{opacity: 1, offset: 1},
]);
});
it('should support an easing value that uses cubic-bezier(...)', () => {
const steps = [
style({opacity: 0}),
animate('1s cubic-bezier(.29, .55 ,.53 ,1.53)', style({opacity: 1}))
];
const player = invokeAnimationSequence(steps)[0];
const lastKeyframe = player.keyframes[1];
const lastKeyframeEasing = <string>lastKeyframe['easing'];
expect(lastKeyframeEasing.replace(/\s+/g, '')).toEqual('cubic-bezier(.29,.55,.53,1.53)');
});
});
describe('sequence()', () => {
it('should not produce extra timelines when multiple sequences are used within each other',
() => {
const steps = [
style({width: 0}), animate(1000, style({width: 100})), sequence([
animate(1000, style({width: 200})),
sequence([animate(1000, style({width: 300}))])
]),
animate(1000, style({width: 400})), sequence([animate(1000, style({width: 500}))])
];
const players = invokeAnimationSequence(steps);
expect(players[0].keyframes).toEqual([
{width: 0, offset: 0}, {width: 100, offset: .2}, {width: 200, offset: .4},
{width: 300, offset: .6}, {width: 400, offset: .8}, {width: 500, offset: 1}
]);
});
it('should produce a 1ms animation step if a style call exists before sequence within a call to animate()',
() => {
const steps = [
style({width: 100}), sequence([
animate(1000, style({width: 200})),
])
];
const players = invokeAnimationSequence(steps);
expect(humanizeOffsets(players[0].keyframes, 4)).toEqual([
{width: 100, offset: 0}, {width: 100, offset: .001}, {width: 200, offset: 1}
]);
});
it('should create a new timeline after a sequence if group() or keyframe() commands are used within',
() => {
const steps = [
style({width: 100, height: 100}), animate(1000, style({width: 150, height: 150})),
sequence([
group([
animate(1000, style({height: 200})),
]),
animate(1000, keyframes([style({width: 180}), style({width: 200})]))
]),
animate(1000, style({width: 500, height: 500}))
];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(4);
const finalPlayer = players[players.length - 1];
expect(finalPlayer.keyframes).toEqual([
{width: 200, height: 200, offset: 0}, {width: 500, height: 500, offset: 1}
]);
});
});
describe('keyframes()', () => {
it('should produce a sub timeline when `keyframes()` is used within a sequence', () => {
const steps = [
animate(1000, style({opacity: .5})), animate(1000, style({opacity: 1})),
animate(
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1000, keyframes([style({height: 0}), style({height: 100}), style({height: 50})])),
animate(1000, style({height: 0, opacity: 0}))
refactor(animations): introduce @angular/animation module (#14351) PR Close: #14351
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];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(3);
const player0 = players[0];
expect(player0.delay).toEqual(0);
expect(player0.keyframes).toEqual([
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{opacity: AUTO_STYLE, offset: 0},
{opacity: .5, offset: .5},
{opacity: 1, offset: 1},
refactor(animations): introduce @angular/animation module (#14351) PR Close: #14351
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]);
const subPlayer = players[1];
expect(subPlayer.delay).toEqual(2000);
expect(subPlayer.keyframes).toEqual([
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{height: 0, offset: 0},
{height: 100, offset: .5},
{height: 50, offset: 1},
refactor(animations): introduce @angular/animation module (#14351) PR Close: #14351
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]);
const player1 = players[2];
expect(player1.delay).toEqual(3000);
expect(player1.keyframes).toEqual([
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{opacity: 1, height: 50, offset: 0}, {opacity: 0, height: 0, offset: 1}
refactor(animations): introduce @angular/animation module (#14351) PR Close: #14351
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]);
});
it('should propagate inner keyframe style data to the parent timeline if used afterwards',
() => {
const steps = [
style({opacity: 0}), animate(1000, style({opacity: .5})),
animate(1000, style({opacity: 1})), animate(1000, keyframes([
style({color: 'red'}),
style({color: 'blue'}),
])),
animate(1000, style({color: 'green', opacity: 0}))
];
const players = invokeAnimationSequence(steps);
const finalPlayer = players[players.length - 1];
expect(finalPlayer.keyframes).toEqual([
{opacity: 1, color: 'blue', offset: 0}, {opacity: 0, color: 'green', offset: 1}
]);
});
it('should feed in starting data into inner keyframes if used in an style step beforehand',
() => {
const steps = [
animate(1000, style({opacity: .5})), animate(1000, keyframes([
style({opacity: .8, offset: .5}),
style({opacity: 1, offset: 1}),
]))
];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(2);
const topPlayer = players[0];
expect(topPlayer.keyframes).toEqual([
{opacity: AUTO_STYLE, offset: 0}, {opacity: .5, offset: 1}
]);
const subPlayer = players[1];
expect(subPlayer.keyframes).toEqual([
{opacity: .5, offset: 0}, {opacity: .8, offset: 0.5}, {opacity: 1, offset: 1}
]);
});
it('should set the easing value as an easing value for the entire timeline', () => {
const steps = [
style({opacity: 0}), animate(1000, style({opacity: .5})),
animate(
'1s ease-out',
keyframes([style({opacity: .8, offset: .5}), style({opacity: 1, offset: 1})]))
];
const player = invokeAnimationSequence(steps)[1];
expect(player.easing).toEqual('ease-out');
});
it('should combine the starting time + the given delay as the delay value for the animated keyframes',
() => {
const steps = [
style({opacity: 0}), animate(500, style({opacity: .5})),
animate(
'1s 2s ease-out',
keyframes([style({opacity: .8, offset: .5}), style({opacity: 1, offset: 1})]))
];
const player = invokeAnimationSequence(steps)[1];
expect(player.delay).toEqual(2500);
});
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it('should not leak in additional styles used later on after keyframe styles have already been declared',
() => {
const steps = [
animate(1000, style({height: '50px'})),
animate(
2000, keyframes([
style({left: '0', transform: 'rotate(0deg)', offset: 0}),
style({
left: '40%',
transform: 'rotate(250deg) translateY(-200px)',
offset: .33
}),
style(
{left: '60%', transform: 'rotate(180deg) translateY(200px)', offset: .66}),
style({left: 'calc(100% - 100px)', transform: 'rotate(0deg)', offset: 1}),
])),
group([animate('2s', style({width: '200px'}))]),
animate('2s', style({height: '300px'})),
group([animate('2s', style({height: '500px', width: '500px'}))])
];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(5);
const firstPlayerKeyframes = players[0].keyframes;
expect(firstPlayerKeyframes[0]['width']).toBeFalsy();
expect(firstPlayerKeyframes[1]['width']).toBeFalsy();
expect(firstPlayerKeyframes[0]['height']).toEqual(AUTO_STYLE);
expect(firstPlayerKeyframes[1]['height']).toEqual('50px');
const keyframePlayerKeyframes = players[1].keyframes;
expect(keyframePlayerKeyframes[0]['width']).toBeFalsy();
expect(keyframePlayerKeyframes[0]['height']).toBeFalsy();
const groupPlayerKeyframes = players[2].keyframes;
expect(groupPlayerKeyframes[0]['width']).toEqual(AUTO_STYLE);
expect(groupPlayerKeyframes[1]['width']).toEqual('200px');
expect(groupPlayerKeyframes[0]['height']).toBeFalsy();
expect(groupPlayerKeyframes[1]['height']).toBeFalsy();
const secondToFinalAnimatePlayerKeyframes = players[3].keyframes;
expect(secondToFinalAnimatePlayerKeyframes[0]['width']).toBeFalsy();
expect(secondToFinalAnimatePlayerKeyframes[1]['width']).toBeFalsy();
expect(secondToFinalAnimatePlayerKeyframes[0]['height']).toEqual('50px');
expect(secondToFinalAnimatePlayerKeyframes[1]['height']).toEqual('300px');
const finalAnimatePlayerKeyframes = players[4].keyframes;
expect(finalAnimatePlayerKeyframes[0]['width']).toEqual('200px');
expect(finalAnimatePlayerKeyframes[1]['width']).toEqual('500px');
expect(finalAnimatePlayerKeyframes[0]['height']).toEqual('300px');
expect(finalAnimatePlayerKeyframes[1]['height']).toEqual('500px');
});
refactor(animations): introduce @angular/animation module (#14351) PR Close: #14351
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});
describe('group()', () => {
it('should properly tally style data within a group() for use in a follow-up animate() step',
() => {
const steps = [
style({width: 0, height: 0}), animate(1000, style({width: 20, height: 50})),
group([animate('1s 1s', style({width: 200})), animate('1s', style({height: 500}))]),
animate(1000, style({width: 1000, height: 1000}))
];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(4);
const player0 = players[0];
expect(player0.duration).toEqual(1000);
expect(player0.keyframes).toEqual([
{width: 0, height: 0, offset: 0}, {width: 20, height: 50, offset: 1}
]);
const gPlayer1 = players[1];
expect(gPlayer1.duration).toEqual(2000);
expect(gPlayer1.delay).toEqual(1000);
expect(gPlayer1.keyframes).toEqual([
{width: 20, offset: 0}, {width: 20, offset: .5}, {width: 200, offset: 1}
]);
const gPlayer2 = players[2];
expect(gPlayer2.duration).toEqual(1000);
expect(gPlayer2.delay).toEqual(1000);
expect(gPlayer2.keyframes).toEqual([
{height: 50, offset: 0}, {height: 500, offset: 1}
]);
const player1 = players[3];
expect(player1.duration).toEqual(1000);
expect(player1.delay).toEqual(3000);
expect(player1.keyframes).toEqual([
{width: 200, height: 500, offset: 0}, {width: 1000, height: 1000, offset: 1}
]);
});
it('should support groups with nested sequences', () => {
const steps = [group([
sequence([
style({opacity: 0}),
animate(1000, style({opacity: 1})),
]),
sequence([
style({width: 0}),
animate(1000, style({width: 200})),
])
])];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(2);
const gPlayer1 = players[0];
expect(gPlayer1.delay).toEqual(0);
expect(gPlayer1.keyframes).toEqual([
{opacity: 0, offset: 0},
{opacity: 1, offset: 1},
]);
const gPlayer2 = players[1];
expect(gPlayer1.delay).toEqual(0);
expect(gPlayer2.keyframes).toEqual([{width: 0, offset: 0}, {width: 200, offset: 1}]);
});
it('should respect delays after group entries', () => {
const steps = [
style({width: 0, height: 0}), animate(1000, style({width: 50, height: 50})), group([
animate(1000, style({width: 100})),
animate(1000, style({height: 100})),
]),
animate('1s 1s', style({height: 200, width: 200}))
];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(4);
const finalPlayer = players[players.length - 1];
expect(finalPlayer.delay).toEqual(2000);
expect(finalPlayer.duration).toEqual(2000);
expect(finalPlayer.keyframes).toEqual([
{width: 100, height: 100, offset: 0},
{width: 100, height: 100, offset: .5},
{width: 200, height: 200, offset: 1},
]);
});
});
describe('timing values', () => {
it('should properly combine an easing value with a delay into a set of three keyframes',
() => {
const steps: AnimationMetadata[] =
[style({opacity: 0}), animate('3s 1s ease-out', style({opacity: 1}))];
const player = invokeAnimationSequence(steps)[0];
expect(player.keyframes).toEqual([
{opacity: 0, offset: 0}, {opacity: 0, offset: .25},
{opacity: 1, offset: 1, easing: 'ease-out'}
]);
});
it('should allow easing values to exist for each animate() step', () => {
const steps: AnimationMetadata[] = [
style({width: 0}), animate('1s linear', style({width: 10})),
animate('2s ease-out', style({width: 20})), animate('1s ease-in', style({width: 30}))
];
const players = invokeAnimationSequence(steps);
expect(players.length).toEqual(1);
const player = players[0];
expect(player.keyframes).toEqual([
{width: 0, offset: 0}, {width: 10, offset: .25, easing: 'linear'},
{width: 20, offset: .75, easing: 'ease-out'},
{width: 30, offset: 1, easing: 'ease-in'}
]);
});
it('should produce a top-level timeline only for the duration that is set as before a group kicks in',
() => {
const steps: AnimationMetadata[] = [
style({width: 0, height: 0, opacity: 0}),
animate('1s', style({width: 100, height: 100, opacity: .2})), group([
animate('500ms 1s', style({width: 500})), animate('1s', style({height: 500})),
sequence([
animate(500, style({opacity: .5})),
animate(500, style({opacity: .6})),
animate(500, style({opacity: .7})),
animate(500, style({opacity: 1})),
])
])
];
const player = invokeAnimationSequence(steps)[0];
expect(player.duration).toEqual(1000);
expect(player.delay).toEqual(0);
});
it('should offset group() and keyframe() timelines with a delay which is the current time of the previous player when called',
() => {
const steps: AnimationMetadata[] = [
style({width: 0, height: 0}),
animate('1500ms linear', style({width: 10, height: 10})), group([
animate(1000, style({width: 500, height: 500})),
animate(2000, style({width: 500, height: 500}))
]),
animate(1000, keyframes([
style({width: 200}),
style({width: 500}),
]))
];
const players = invokeAnimationSequence(steps);
expect(players[0].delay).toEqual(0); // top-level animation
expect(players[1].delay).toEqual(1500); // first entry in group()
expect(players[2].delay).toEqual(1500); // second entry in group()
expect(players[3].delay).toEqual(3500); // animate(...keyframes())
});
});
describe('state based data', () => {
it('should create an empty animation if there are zero animation steps', () => {
const steps: AnimationMetadata[] = [];
const fromStyles: StyleData[] = [{background: 'blue', height: 100}];
const toStyles: StyleData[] = [{background: 'red'}];
const player = invokeAnimationSequence(steps, fromStyles, toStyles)[0];
expect(player.duration).toEqual(0);
expect(player.keyframes).toEqual([]);
});
it('should produce an animation from start to end between the to and from styles if there are animate steps in between',
() => {
const steps: AnimationMetadata[] = [animate(1000)];
const fromStyles: StyleData[] = [{background: 'blue', height: 100}];
const toStyles: StyleData[] = [{background: 'red'}];
const players = invokeAnimationSequence(steps, fromStyles, toStyles);
expect(players[0].keyframes).toEqual([
{background: 'blue', height: 100, offset: 0},
{background: 'red', height: AUTO_STYLE, offset: 1}
]);
});
});
});
});
}
function humanizeOffsets(keyframes: StyleData[], digits: number = 3): StyleData[] {
return keyframes.map(keyframe => {
keyframe['offset'] = Number(parseFloat(<any>keyframe['offset']).toFixed(digits));
return keyframe;
});
}
function invokeAnimationSequence(
steps: AnimationMetadata | AnimationMetadata[], startingStyles: StyleData[] = [],
destinationStyles: StyleData[] = []): AnimationTimelineInstruction[] {
return new Animation(steps).buildTimelines(startingStyles, destinationStyles);
}
function validateAndThrowAnimationSequence(steps: AnimationMetadata | AnimationMetadata[]) {
const ast =
Array.isArray(steps) ? sequence(<AnimationMetadata[]>steps) : <AnimationMetadata>steps;
const errors = validateAnimationSequence(ast);
if (errors.length) {
throw new Error(errors.join('\n'));
}
}