Added potentiate functionality and test

src/main/py/logarithmic_and_expo_and_root_calculations.py

@@ -3,3 +3,7 @@ import math
 
 def sqrt(first_number):
     return math.sqrt(first_number)
+
+
+def potentiate(first_number, second_number):
+    return math.pow(first_number, second_number)

src/test/py/logarithmic_ann_expo_and_root_calculations.py

@@ -12,6 +12,9 @@ class primitive_calculations(unittest.TestCase):
     def test_sqrt_of_4_equals_2(self):
         self.assertEqual(sqrt(4), 2)
 
+    def test_2_potentiate_3_equals_8(self):
+        self.assertEqual(potentiate(2, 3), 8)
+
 
 if __name__ == "__main__":
     unittest.main()