string_helpers.test.ts

import { describe, expect, it } from 'vitest';

import {
    stringExcerpt,
    stringReverse,
    stringToCamelCase,
    stringToSlug,
    stringToStudlyCase,
    stringToTitleCase,
} from './string_helpers';

describe('String helpers', () => {

    it('reverses string characters', () => {
        expect(stringReverse('foobar')).toEqual('raboof');
    });

    it('converts strings to camelCase', () => {
        expect(stringToCamelCase('foo_bar')).toEqual('fooBar');
        expect(stringToCamelCase('Foo Bar')).toEqual('fooBar');
        expect(stringToCamelCase('fooBar')).toEqual('fooBar');
    });

    it('converts strings to slug', () => {
        expect(stringToSlug('Sin perdón')).toEqual('sin-perdon');
        expect(stringToSlug('Mañana')).toEqual('manana');
        expect(stringToSlug('It\'s always sunny in philadelphia')).toEqual('its-always-sunny-in-philadelphia');
        expect(stringToSlug('It\'s always sunny in philadelphia   ')).toEqual('its-always-sunny-in-philadelphia');
        expect(stringToSlug('already-a-slug')).toEqual('already-a-slug');
        expect(stringToSlug('Not clean: [/\\?!] end')).toEqual('not-clean-end');
        expect(stringToSlug('土豆')).toEqual('土豆');
        expect(stringToSlug('ラーメン')).toEqual('ラーメン');
        expect(stringToSlug('【試食系列(1)－鰻魚啫喱Jellied Eels (內有短片)】')).toEqual(
            '試食系列-1-鰻魚啫喱jellied-eels-內有短片',
        );
    });

    it('converts strings to StudlyCase', () => {
        expect(stringToStudlyCase('foo_bar')).toEqual('FooBar');
        expect(stringToStudlyCase('foo-bar')).toEqual('FooBar');
        expect(stringToStudlyCase('Foo Bar')).toEqual('FooBar');
        expect(stringToStudlyCase('fooBar')).toEqual('FooBar');
    });

    it('converts strings to Title Case', () => {
        expect(stringToTitleCase('foo_bar')).toEqual('Foo Bar');
        expect(stringToTitleCase('foo-bar')).toEqual('Foo Bar');
        expect(stringToTitleCase('Foo Bar')).toEqual('Foo Bar');
        expect(stringToTitleCase('fooBar')).toEqual('Foo Bar');
    });

    it('returns string excerpts', () => {
        expect(stringExcerpt('We suffer more in imagination than in reality', 23)).toEqual('We suffer more in im...');
        expect(stringExcerpt('Your external self will seldom surpass your personal self', 42, ' [...]')).toEqual(
            'Your external self will seldom surpa [...]',
        );
    });

});