def test_error_invalid_token_with_whitespace():
with pytest.raises(SyntaxError) as excinfo:
tokenize('1 + lo g 2')
assert ('SyntaxError: Invalid character "l"'
in excinfo.exconly())
def test_tokenize_single_int():
assert tokenize("1") == tokenize(" 1 ") == ["1"]
def test_linear_equation():
assert tokenize("2*x=1") == tokenize(" 2 * x = 1") == ["2", "*", "x", "=", "1"]
def test_error_on_invalid_character():
with pytest.raises(SyntaxError) as excinfo:
tokenize('1 + yxz')
assert ('SyntaxError: Invalid character "y"'
in excinfo.exconly())
def test_tokenize_parentheses():
assert tokenize("1*(2+3)") == tokenize(" 1 * (2 + 3 )") == ["1", "*", "(", "2", "+", "3", ")"]
def test_tokenize_log():
assert tokenize("log(2.0)") == tokenize(" log ( 2.0 )") == ["log", "(", "2.0", ")"]
def test_tokenize_binary_simple_operations():
assert tokenize("1+2") == tokenize("1 + 2") == ["1", "+", "2"]
assert tokenize("1-2") == tokenize(" 1 - 2") == ["1", "-", "2"]
assert tokenize("1*2") == tokenize("1 * 2 ") == ["1", "*", "2"]
assert tokenize("1/2") == tokenize("1 / 2") == ["1", "/", "2"]
def test_tokenize_unary():
assert tokenize("-1") == tokenize(" - 1") == ["-", "1"]
def test_tokenize_single_float():
assert tokenize("1.0") == tokenize(" 1.0 ") == ["1.0"]
