def test_init_user_attributes_from_ldap(monkeypatch, arrange_ldap_auth):

    """Authenticate unknown user with mocked LDAP, verify user is created.

    """

    # Arrange test user.

    uniqifier = uuid.uuid4()

    username = 'test-user-{}'.format(uniqifier)

    assert User.get_by_username(username) is None

    # Arrange LDAP auth.

    monkeypatch.setattr(auth_ldap, 'AuthLdap', _AuthLdapMock)

    # Authenticate with LDAP.

    user_data = authenticate(username, 'password')

    # Verify that authenication succeeded and retrieved correct attributes

    # from LDAP.

    assert user_data is not None

    assert user_data.get('firstname') == 'spam ldap first name'

    assert user_data.get('lastname') == 'spam ldap last name'

    assert user_data.get('email') == 'spam ldap email'

    # Verify that authentication created new user with attributes

    # retrieved from LDAP.

    new_user = User.get_by_username(username)

    assert new_user is not None

    assert new_user.firstname == 'spam ldap first name'

    assert new_user.lastname == 'spam ldap last name'

    assert new_user.email == 'spam ldap email'