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

import { navigate, currentHash, matchRoute } from '../../js/router.js';



describe('router', () => {

    beforeEach(() => {

        window.location.hash = '';

    });



    it('currentHash defaults to / when empty', () => {

        window.location.hash = '';

        expect(currentHash()).toBe('/');

    });



    it('currentHash strips leading hash', () => {

        window.location.hash = '#/dashboard';

        expect(currentHash()).toBe('/dashboard');

    });



    it('navigate sets window hash', () => {

        navigate('#/login');

        expect(window.location.hash).toBe('#/login');

    });



    it('matchRoute extracts questionnaire id', () => {

        const params = matchRoute('/questionnaire/:id', '/questionnaire/qn-123');

        expect(params).toEqual({ id: 'qn-123' });

    });



    it('matchRoute returns null when path does not match', () => {

        expect(matchRoute('/questionnaire/:id', '/users')).toBeNull();

    });

});