29 lines
1.1 KiB
TypeScript
29 lines
1.1 KiB
TypeScript
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import {
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describe,
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expect,
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it,
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} from 'vitest';
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import { computeStrutHeight } from './computeStrutHeight';
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describe('computeStrutHeight', () => {
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it('uses the centering height when the line-height is generous', () => {
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// centering = 40/2 + 16*0.34 = 25.44; floor = 16*1.1 = 17.6 → centering wins.
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expect(computeStrutHeight(40, 16)).toBeCloseTo(25.44, 5);
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});
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it('falls back to the ascent floor when the line-height is tight', () => {
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// centering = 16/2 + 16*0.34 = 13.44; floor = 16*1.1 = 17.6 → floor wins.
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expect(computeStrutHeight(16, 16)).toBeCloseTo(17.6, 5);
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});
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it('treats the floor and centering height as equal at the crossover line-height', () => {
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// centering == floor when lineHeight = 1.52 * fontSize → 24.32 for 16px.
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expect(computeStrutHeight(24.32, 16)).toBeCloseTo(17.6, 5);
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});
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it('scales with font size', () => {
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// centering = 60/2 + 32*0.34 = 40.88; floor = 32*1.1 = 35.2 → centering wins.
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expect(computeStrutHeight(60, 32)).toBeCloseTo(40.88, 5);
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});
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});
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