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50 lines
2.1 KiB
TypeScript
50 lines
2.1 KiB
TypeScript
/**
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* Copyright 2023-present DreamNum Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { describe, expect, it } from 'vitest';
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import {
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AlignmentSnapSession,
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getAlignmentRectXAnchors,
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getAlignmentRectYAnchors,
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getClosestAlignmentOffset,
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} from '../alignment-snap';
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describe('alignment snap', () => {
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it('resolves normalized edge and center anchors', () => {
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const rect = { left: 30, top: 50, width: -20, height: -40 };
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expect(getAlignmentRectXAnchors(rect)).toEqual([10, 20, 30]);
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expect(getAlignmentRectYAnchors(rect)).toEqual([10, 30, 50]);
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expect(getClosestAlignmentOffset([10, 20, 30], [32], 3)).toBe(2);
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});
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it('uses hysteresis and breakaway without accumulating correction', () => {
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const session = new AlignmentSnapSession({
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enterThreshold: 6,
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exitThreshold: 14,
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breakawayThreshold: 4,
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cooldownMs: 250,
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});
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const guide = { id: 'x:100', axis: 'x' as const, position: 100 };
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expect(session.resolveAxisSnap({ axis: 'x', value: 97, guide, now: 0 })).toMatchObject({ snapped: true, value: 100 });
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expect(session.resolveAxisSnap({ axis: 'x', value: 99, guide, now: 1 })).toMatchObject({ snapped: true, value: 100 });
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expect(session.resolveAxisSnap({ axis: 'x', value: 103, guide, now: 2 })).toMatchObject({ snapped: false, value: 103 });
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expect(session.resolveAxisSnap({ axis: 'x', value: 99, guide, now: 100 })).toMatchObject({ snapped: false, value: 99 });
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expect(session.resolveAxisSnap({ axis: 'x', value: 99, guide, now: 300 })).toMatchObject({ snapped: true, value: 100 });
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});
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});
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