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2024_05_31_DataStructures/test_factorial.py

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+# python3 -m unittest test_factorial.py
+
+import unittest
+from factorial import factorial_iteration
+from factorial import factorial_dynamic_programming
+
+class TestFactorial(unittest.TestCase):
+    def test_factorial_iteration(self):
+        self.assertEqual(factorial_iteration(1), 1)
+        self.assertEqual(factorial_iteration(0), 1)
+        self.assertEqual(factorial_iteration(5), 120)
+
+        self.assertEqual(factorial_dynamic_programming(1), 1)
+        self.assertEqual(factorial_dynamic_programming(0), 1)
+        self.assertEqual(factorial_dynamic_programming(4), 24)
+
+    def test_negative(self):
+        self.assertRaises(ValueError, factorial_iteration, -1)
+        self.assertRaises(ValueError, factorial_dynamic_programming, -5)
+
+    def test_nonnumber(self):
+        self.assertRaises(TypeError, factorial_iteration, True)
+        self.assertRaises(TypeError, factorial_iteration, "codeinplace")
+
+        self.assertRaises(TypeError, factorial_dynamic_programming, True)
+        self.assertRaises(TypeError, factorial_dynamic_programming, "codeinplace")