def test_six():
exp = "(1+2) {5+9 (7)"
expected = False
actual = check_expresion(exp)
assert actual == expected, "Error on test_six."
def test_one():
exp = "(1+2)"
expected = True
actual = check_expresion(exp)
assert actual == expected, "Error on test_one."
def test_four():
exp = "(1+2<) 1>"
expected = False
actual = check_expresion(exp)
assert actual == expected, "Error on test_four."
def test_five():
exp = "(1+2) <1> - {5+9}"
expected = True
actual = check_expresion(exp)
assert actual == expected, "Error on test_five."
def test_two():
exp = "1+2)"
expected = False
actual = check_expresion(exp)
assert actual == expected, "Error on test_two."