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import { describe, expect, test } from 'vitest'; | ||
import fontSubstitution from '../../src/text/fontSubstitution'; | ||
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const instance = fontSubstitution(); | ||
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describe('FontSubstitution', () => { | ||
test('should return empty array if no runs passed', () => { | ||
const string = instance({ string: '', runs: [] }); | ||
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expect(string).toHaveProperty('runs', []); | ||
expect(string).toHaveProperty('string', ''); | ||
}); | ||
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test('should merge consecutive runs with same font', () => { | ||
const run1 = { start: 0, end: 3, attributes: { font: ['Helvetica'] } }; | ||
const run2 = { start: 3, end: 5, attributes: { font: ['Helvetica'] } }; | ||
const string = instance({ string: 'Lorem', runs: [run1, run2] }); | ||
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expect(string).toHaveProperty('string', 'Lorem'); | ||
expect(string.runs).toHaveLength(1); | ||
expect(string.runs[0]).toHaveProperty('start', 0); | ||
expect(string.runs[0]).toHaveProperty('end', 5); | ||
expect(string.runs[0].attributes.font.name).toBe('Helvetica'); | ||
}); | ||
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test('should substitute many runs', () => { | ||
const run1 = { start: 0, end: 3, attributes: { font: ['Courier'] } }; | ||
const run2 = { start: 3, end: 5, attributes: { font: ['Helvetica'] } }; | ||
const string = instance({ string: 'Lorem', runs: [run1, run2] }); | ||
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expect(string).toHaveProperty('string', 'Lorem'); | ||
expect(string.runs).toHaveLength(2); | ||
expect(string.runs[0]).toHaveProperty('start', 0); | ||
expect(string.runs[0]).toHaveProperty('end', 3); | ||
expect(string.runs[0].attributes.font.name).toBe('Courier'); | ||
expect(string.runs[1]).toHaveProperty('start', 3); | ||
expect(string.runs[1]).toHaveProperty('end', 5); | ||
expect(string.runs[1].attributes.font.name).toBe('Helvetica'); | ||
}); | ||
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describe('Fallback Font', () => { | ||
const SimplifiedChineseFont = { | ||
name: 'SimplifiedChineseFont', | ||
hasGlyphForCodePoint: (codePoint) => codePoint === 20320, | ||
}; | ||
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test('should utilize a fallback font that supports the provided glyph', () => { | ||
const run = { | ||
start: 0, | ||
end: 1, | ||
attributes: { | ||
font: ['Courier', SimplifiedChineseFont], | ||
}, | ||
}; | ||
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const string = instance({ string: '你', runs: [run] }); | ||
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expect(string).toHaveProperty('string', '你'); | ||
expect(string.runs).toHaveLength(1); | ||
expect(string.runs[0]).toHaveProperty('start', 0); | ||
expect(string.runs[0]).toHaveProperty('end', 1); | ||
expect(string.runs[0].attributes.font.name).toBe( | ||
SimplifiedChineseFont.name, | ||
); | ||
}); | ||
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test('should split a run when fallback font is used on a portion of the run', () => { | ||
const run = { | ||
start: 0, | ||
end: 2, | ||
attributes: { | ||
font: ['Courier', SimplifiedChineseFont], | ||
}, | ||
}; | ||
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const string = instance({ string: 'A你', runs: [run] }); | ||
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expect(string).toHaveProperty('string', 'A你'); | ||
expect(string.runs).toHaveLength(2); | ||
expect(string.runs[0]).toHaveProperty('start', 0); | ||
expect(string.runs[0]).toHaveProperty('end', 1); | ||
expect(string.runs[0].attributes.font.name).toBe('Courier'); | ||
expect(string.runs[1]).toHaveProperty('start', 1); | ||
expect(string.runs[1]).toHaveProperty('end', 2); | ||
expect(string.runs[1].attributes.font.name).toBe( | ||
SimplifiedChineseFont.name, | ||
); | ||
}); | ||
}); | ||
}); |