def test_string():
string_exp = '"Here\'s a semi hairy example"'
assert list(lex(string_exp)) == [string_exp]
lambda_string_exp = "(lambda () '({}))".format(string_exp)
assert list(lex(lambda_string_exp)) == [
"(", "lambda", "(", ")", "'", "(", string_exp, ")", ")"
]
def test_lambda_exp():
lambda_exp = "(lambda () nil)"
assert list(lex(lambda_exp)) == ["(", "lambda", "(", ")", "nil", ")"]
def test_single_digits():
digits_exp = "(define () 5)"
assert list(lex(digits_exp)) == ["(", "define", "(", ")", "5", ")"]
def test_empty_exp():
empty = ""
assert list(lex(empty)) == []
def test_quoted_list():
quoted_exp = "'()"
assert list(lex(quoted_exp)) == ["'", "(", ")"]
quasi_quoted_exp = "`()"
assert list(lex(quasi_quoted_exp)) == ["`", "(", ")"]