def test_check_helper_string(): assert not check.check_helpers("John Doe")
def test_check_helpers_only_one(): assert check.check_helpers(["John Doe"])
def test_check_helpers_empty(): assert check.check_helpers([])
def test_check_helpers(): assert check.check_helpers(["John Doe", "Jane Doe"])
def test_check_instructor_empty(): assert check.check_helpers([])
def test_check_instructor_only_one(): assert check.check_helpers(["John Doe"])