Code #2518
Python
'''Self-contained demonstration: a simple target_function and its unit tests. This module is designed to be self-contained and runnable as a script. It includes a concise docstring, a straightforward implementation of target_function, and a unittest-based test suite. Running it executes the tests.'''\n\nimport unittest\n\ndef target_function(value):\n '''\n A simple multipurpose function used for illustrating unit tests.\n\n Behavior:\n - If value is an int, returns value squared.\n - If value is a str, returns the string reversed.\n - Otherwise, raises TypeError.\n '''\n if isinstance(value, int):\n return value * value\n if isinstance(value, str):\n return value[::-1]\n raise TypeError('Unsupported type: {}'.format(type(value).__name__))\n\nclass TestTargetFunction(unittest.TestCase):\n # Unit tests for target_function.\n\n def test_int_input(self):\n self.assertEqual(target_function(3), 9)\n self.assertEqual(target_function(-4), 16)\n\n def test_str_input(self):\n self.assertEqual(target_function('abc'), 'cba')\n self.assertEqual(target_function(''), '')\n\n def test_unsupported_type(self):\n with self.assertRaises(TypeError):\n target_function(3.14)\n with self.assertRaises(TypeError):\n target_function([1, 2, 3])\n\nif __name__ == '__main__':\n unittest.main()
Prompt: unspecified
