string-tool
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Useful functions for Strings
31 lines (23 loc) • 1 kB
text/typescript
import { capitalize, nthIndexOf } from '../String';
describe('capitalize', () => {
it('should return true when the first letter was capitalized correctly', () => {
expect(capitalize('a')).toEqual('A');
expect(capitalize('ß')).toEqual('SS');
expect(capitalize('über')).toEqual('Über');
expect(capitalize('égalité')).toEqual('Égalité');
});
it('should return an empty string when the input is empty', () => {
expect(capitalize('')).toEqual('');
});
});
describe('nthIndexOf', () => {
it('should find the position of the searchString', () => {
expect(nthIndexOf('testtest test', 1, 'test')).toEqual(0);
expect(nthIndexOf('testtest test', 2, 'test')).toEqual(4);
expect(nthIndexOf('testtest test', 3, 'test')).toEqual(9);
});
it('should return undefined when the searchString does not exist', () => {
expect(nthIndexOf('testtest test', 0, 'test')).toBe(undefined);
expect(nthIndexOf('bla bla bla', 2, 'test')).toBe(undefined);
});
});