def test_accepts_uppercase_letters(self): assert_equal(is_valid('AB'), True) @raises(InvalidInputError)
def test_rejects_lowercase_letters(self): assert_equal(is_valid('Ab'), False) def test_rejects_numbers(self): assert_equal(is_valid('A9'), False)
def test_rejects_numbers(self): assert_equal(is_valid('A9'), False) def test_accepts_uppercase_letters(self): assert_equal(is_valid('AB'), True)
def test_rejects_empty_string(self): assert_equal(is_valid(''), False) def test_rejects_spaces(self): assert_equal(is_valid('A '), False)