def test_is_float_string(self):
valid = ["23", "2.123", " 97"]
invalid = ["127.0.0.1", "cos(12.2)", "tan(sin(atan(cosh(1))))", "pie", "1+2*3/4^5%6", "gamma(17)", "hello",
"1&2", "$13.50", "1::", "cos(tan(12+t+15))", "9 7"]
for valid_str in valid:
assert Commons.is_float_string(valid_str), "Valid string judged to be not float, "+valid_str
for invalid_str in invalid:
assert not Commons.is_float_string(invalid_str), "Invalid string judged to be float, "+invalid_str
