def test_not_numeric_values_in_list(self):
"""
This test checks if the function deals correctly with list with not numeric values given as an argument.
"""
with self.assertRaises(TypeError) as error:
data_range([1, 'a'])
self.assertEqual(
error.exception.args[0],
'argument of the function must be a list of values of type int '
'or float')
def test_not_a_list(self):
"""
This test checks if the function deals correctly with not a list argument.
"""
with self.assertRaises(TypeError) as error:
data_range('a')
self.assertEqual(
error.exception.args[0],
'argument of the function must be a list of values of type int '
'or float')
def test_data_ranhe(self):
self.assertEqual(stats.data_range([1, 2, 3, 4, 5]), 4)
def test_simple_float_list(self):
"""
This test checks if the function deals correctly with list [1.21, -3.42, 5.56, 112.86, -34].
"""
self.assertEqual(data_range([1.21, -3.42, 5.56, 112.86, -34]), 146.86)
def test_simple_int_list(self):
"""
This test checks if the function deals correctly with list [1, 2, 3, 4, 5].
"""
self.assertEqual(data_range([1, 2, 3, 4, 5]), 4)
def test_one_element(self):
"""
This test checks if the function deals correctly with list of one element.
"""
self.assertEqual(data_range([1]), 0)