35 lines
1.0 KiB
TypeScript
35 lines
1.0 KiB
TypeScript
import capitalize from "../../src/utils/capitalize.ts";
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describe('capitalize', () => {
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it('capitalizes the first letter of a lowercase word', () => {
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expect(capitalize('hello')).toBe('Hello');
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});
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it('keeps the first letter capitalized if already uppercase', () => {
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expect(capitalize('Hello')).toBe('Hello');
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});
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it('handles single character strings', () => {
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expect(capitalize('a')).toBe('A');
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expect(capitalize('A')).toBe('A');
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});
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it('returns empty string for empty input', () => {
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expect(capitalize('')).toBe('');
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});
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it('only capitalizes the first letter, leaving the rest unchanged', () => {
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expect(capitalize('hELLO')).toBe('HELLO');
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expect(capitalize('hello world')).toBe('Hello world');
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});
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it('handles strings starting with numbers', () => {
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expect(capitalize('123abc')).toBe('123abc');
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});
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it('handles strings starting with special characters', () => {
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expect(capitalize('!hello')).toBe('!hello');
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expect(capitalize(' hello')).toBe(' hello');
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});
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});
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