def test_is_number_valid_negative_float_succeed(self):
s = '-123.456'
result = is_number(s)
self.assertEqual(result, True)
def test_is_number_random_string_fail(self):
s = 'random_string'
result = is_number(s)
self.assertEqual(result, False)
def test_is_number_valid_int_succeed(self):
s = '123'
result = is_number(s)
self.assertEqual(result, True)
def test_is_number_empty_string_fail(self):
s = ''
result = is_number(s)
self.assertEqual(result, False)
def test_is_number_none_fail(self):
s = None
result = is_number(s)
self.assertEqual(result, False)
def test_is_number_random_string_fail(self):
s = 'random_string'
result = is_number(s)
self.assertEqual(result, False)
def test_is_number_none_fail(self):
s = None
result = is_number(s)
self.assertEqual(result, False)
def test_is_number_empty_string_fail(self):
s = ''
result = is_number(s)
self.assertEqual(result, False)
def test_is_number_valid_negative_float_succeed(self):
s = '-123.456'
result = is_number(s)
self.assertEqual(result, True)
def test_is_number_valid_int_succeed(self):
s = '123'
result = is_number(s)
self.assertEqual(result, True)