def test_cannot_handle_non_string_objects(self):
with self.assertRaises(TypeError) as raised:
# noinspection PyTypeChecker
is_number(None)
self.assertEqual(str(raised.exception),
'Expected "str", received "NoneType"')
with self.assertRaises(TypeError) as raised:
# noinspection PyTypeChecker
is_number(False)
self.assertEqual(str(raised.exception),
'Expected "str", received "bool"')
with self.assertRaises(TypeError) as raised:
# noinspection PyTypeChecker
is_number(0)
self.assertEqual(str(raised.exception),
'Expected "str", received "int"')
with self.assertRaises(TypeError) as raised:
# noinspection PyTypeChecker
is_number([])
self.assertEqual(str(raised.exception),
'Expected "str", received "list"')
with self.assertRaises(TypeError) as raised:
# noinspection PyTypeChecker
is_number({'a': 1})
self.assertEqual(str(raised.exception),
'Expected "str", received "dict"')
def test_double_cannot_contain_multiple_dots(self):
self.assertFalse(is_number('+1..0'))
self.assertFalse(is_number('+..007'))
self.assertFalse(is_number('+1..000'))
self.assertFalse(is_number('+99..99'))
self.assertFalse(is_number('+1234567890..000123456'))
self.assertFalse(is_number('-1..0'))
self.assertFalse(is_number('-..007'))
self.assertFalse(is_number('-1..000'))
self.assertFalse(is_number('-99..99'))
self.assertFalse(is_number('-1234567890..000123456'))
def test_returns_true_for_signed_double(self):
self.assertTrue(is_number('+1.0'))
self.assertTrue(is_number('+.007'))
self.assertTrue(is_number('+1.000'))
self.assertTrue(is_number('+99.99'))
self.assertTrue(is_number('+1234567890.000123456'))
self.assertTrue(is_number('-1.0'))
self.assertTrue(is_number('-.007'))
self.assertTrue(is_number('-1.000'))
self.assertTrue(is_number('-99.99'))
self.assertTrue(is_number('-1234567890.000123456'))
def test_number_cannot_contain_multiple_sign(self):
self.assertFalse(is_number('+-1'))
self.assertFalse(is_number('++1'))
self.assertFalse(is_number('--1'))
self.assertFalse(is_number('+-1.1'))
self.assertFalse(is_number('++1.1'))
self.assertFalse(is_number('--1.1'))
def test_returns_true_for_signed_integers(self):
self.assertTrue(is_number('+1'))
self.assertTrue(is_number('+99'))
self.assertTrue(is_number('+1234567890'))
self.assertTrue(is_number('-1'))
self.assertTrue(is_number('-99'))
self.assertTrue(is_number('-1234567890'))
def require_arg_number(parser, args, index, arg_name):
if not string_utils.is_number(args[index]):
exit_parser(parser, "%s must be a number" % arg_name)
def test_returns_true_for_unsigned_double(self):
self.assertTrue(is_number('1.0'))
self.assertTrue(is_number('.007'))
self.assertTrue(is_number('1.000'))
self.assertTrue(is_number('99.99'))
self.assertTrue(is_number('1234567890.000123456'))
def test_returns_true_for_unsigned_integers(self):
self.assertTrue(is_number('1'))
self.assertTrue(is_number('99'))
self.assertTrue(is_number('1234567890'))
def test_returns_false_if_contains_operations(self):
self.assertFalse(is_number('1 + 1'))
self.assertFalse(is_number('1+1'))
self.assertFalse(is_number('1 - 1'))
self.assertFalse(is_number('1-1'))
def test_returns_false_if_string_is_sign_only(self):
self.assertFalse(is_number('+'))
self.assertFalse(is_number('-'))
def test_returns_false_if_string_contains_number_but_has_spaces(self):
self.assertFalse(is_number(' 1'))
self.assertFalse(is_number('99 '))
self.assertFalse(is_number(' 1234 '))
self.assertFalse(is_number(' +1234567890'))
self.assertFalse(is_number(' 1.2 '))
def test_returns_false_if_string_is_empty(self):
self.assertFalse(is_number(''))
self.assertFalse(is_number(' '))
def test_returns_true_for_scientific_notation(self):
self.assertTrue(is_number('1e3'))
self.assertTrue(is_number('50e2'))
self.assertTrue(is_number('1.245e10'))