26 lines
974 B
TypeScript
26 lines
974 B
TypeScript
import { describe, expect, test } from 'bun:test';
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import { findDiffScrollAnchor, getRestoredDiffScrollTop } from './diffScrollAnchor';
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describe('diff scroll anchoring', () => {
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test('uses the last file section that reached the top of the viewport', () => {
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expect(findDiffScrollAnchor(100, [
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{ path: 'third.ts', top: 240 },
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{ path: 'second.ts', top: 80 },
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{ path: 'first.ts', top: -200 },
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])).toEqual({ path: 'second.ts', topOffset: -20 });
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});
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test('uses the first section when no header reached the viewport top yet', () => {
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expect(findDiffScrollAnchor(100, [
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{ path: 'first.ts', top: 140 },
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{ path: 'second.ts', top: 300 },
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])).toEqual({ path: 'first.ts', topOffset: 40 });
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});
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test('restores the prior section offset and clamps at the scroll boundary', () => {
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expect(getRestoredDiffScrollTop(500, -20, 80, 1000)).toBe(600);
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expect(getRestoredDiffScrollTop(950, -20, 80, 1000)).toBe(1000);
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});
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});
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