def METHOD_NAME(self):
    with pytest.raises(ValueError):
        assert DagDefaultArgs(
            owner="test@example.com",
            start_date="2020-12-12",
            email=["valid@example.com", "invalid", "valid2@example.com"],
        )
    assert DagDefaultArgs(
        owner="test@example.com", start_date="2020-12-12", email=[]
    )
    assert DagDefaultArgs(
        owner="test@example.com",
        start_date="2020-12-12",
        email=["test@example.org", "test2@example.org"],
    )