import { normalizeString } from './normalize-string';

describe('normalizeString()', () => {
    it('lowercases the string', () => {
        expect(normalizeString('FOO')).toBe('foo');
        expect(normalizeString('Foo Bar')).toBe('foo bar');
    });

    it('replaces diacritical marks with plain equivalents', () => {
        expect(normalizeString('thé')).toBe('the');
        expect(normalizeString('curaçao')).toBe('curacao');
        expect(normalizeString('dấu hỏi')).toBe('dau hoi');
        expect(normalizeString('el niño')).toBe('el nino');
        expect(normalizeString('genkō yōshi')).toBe('genko yoshi');
        expect(normalizeString('việt nam')).toBe('viet nam');
    });

    it('replaces spaces with the spaceReplacer', () => {
        expect(normalizeString('old man', '_')).toBe('old_man');
        expect(normalizeString('old  man', '_')).toBe('old_man');
    });

    it('strips non-alphanumeric characters', () => {
        expect(normalizeString('hi!!!')).toBe('hi');
        expect(normalizeString('who? me?')).toBe('who me');
        expect(normalizeString('!"£$%^&*()+[]{};:@#~?/,|\\><`¬')).toBe('');
    });

    it('allows a subset of non-alphanumeric characters to pass through', () => {
        expect(normalizeString('-_.')).toBe('-_.');
    });
});
