def test_check_instructor_string(): assert not check.check_instructors("John Doe")
def test_check_instructor_only_one(): assert check.check_instructors(["John Doe"])
def test_check_instructor_empty(): assert not check.check_instructors([])
def test_check_instructors(): assert check.check_instructors(["John Doe", "Jane Doe"])
def test_check_instructor_string(): assert not check.check_instructors("John Doe")
def test_check_instructor_empty(): assert not check.check_instructors([])
def test_check_instructor_only_one(): assert check.check_instructors(["John Doe"])
def test_check_instructors(): assert check.check_instructors(["John Doe", "Jane Doe"])