Tauri-demo: fire user state event only on successful login

auth.spec.ts

it('should emit `user-status-change` event when login successful', async () => {
    const firebaseAuth = await import('firebase/auth');
    (firebaseAuth.signInWithEmailAndPassword as any).mockImplementation(async () => {
        (firebaseAuth.getAuth as any).mockReturnValue({
            currentUser: {
                uid: '123',
                email: 'test@test.com'
            }
        });
    });
    const spy = vi.fn();
    auth.addEventListener('user-status-change', spy);

    await auth.login('email', 'password');
    const eventCallsWithSuccessfulLogin = spy.mock.calls.length;

    expect(eventCallsWithSuccessfulLogin).toBe(1);
});

it('should prevent emit of event `user-status-change` when login unsuccessful', async () => {
    const firebaseAuth = await import('firebase/auth');
    (firebaseAuth.signInWithEmailAndPassword as any).mockImplementation(async () => {
        (firebaseAuth.getAuth as any).mockReturnValue({
            currentUser: null
        });
    });
    const spy = vi.fn();
    auth.addEventListener('user-status-change', spy);

    await auth.login('email', 'password');
    const eventCallsWithUnsuccessfulLogin = spy.mock.calls.length;

    expect(eventCallsWithUnsuccessfulLogin).toBe(0);
});