added

Freitag/test_fak.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+from unittest import TestCase, main
+
+from mathematik import fak
+
+class FacultyTester(TestCase):
+    def test_basic(self):
+        self.assertEqual(fak(0), 1)
+        self.assertEqual(fak(1), 1)
+
+    def test_basic2(self):
+        self.assertTrue(fak(0) == 1)
+        self.assertTrue(fak(1) == 1)
+
+    def test_basic3(self):
+        self.assertFalse(fak(0) == 0)
+    
+    def test_greater(self):
+        for n in range(2,10):
+            self.assertGreater(fak(n), fak(n-1))
+    def test_invalid(self):
+        with self.assertRaises(Exception):
+            fak(-1)
+        with self.assertRaises(ValueError):
+            fak(-1)
+
+
+if __name__ == '__main__':
+    main()
+
+