48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
const { FONT_FAMILY, calcFontSize, estimateTextWidth } = require('../src/lib/svg-utils');
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describe('svg-utils', () => {
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describe('FONT_FAMILY', () => {
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it('should be a non-empty string', () => {
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expect(typeof FONT_FAMILY).toBe('string');
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expect(FONT_FAMILY.length).toBeGreaterThan(0);
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});
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it('should contain Verdana', () => {
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expect(FONT_FAMILY).toContain('Verdana');
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});
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});
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describe('calcFontSize', () => {
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it('should return 60% of size rounded', () => {
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expect(calcFontSize(24)).toBe(14);
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expect(calcFontSize(100)).toBe(60);
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expect(calcFontSize(16)).toBe(10);
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});
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it('should round correctly', () => {
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expect(calcFontSize(25)).toBe(15);
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expect(calcFontSize(33)).toBe(20); // 33 * 0.6 = 19.8 → 20
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});
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});
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describe('estimateTextWidth', () => {
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it('should estimate width based on text length and font size', () => {
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const width = estimateTextWidth('Hello', 14);
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// formula: text.length * fontSize * 0.7
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expect(width).toBe(5 * 14 * 0.7); // 49
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});
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it('should return 0 for empty string', () => {
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expect(estimateTextWidth('', 14)).toBe(0);
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});
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it('should scale with font size', () => {
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const w1 = estimateTextWidth('test', 10);
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const w2 = estimateTextWidth('test', 20);
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expect(w1).toBe(4 * 10 * 0.7); // 28
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expect(w2).toBe(4 * 20 * 0.7); // 56
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});
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});
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});
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