Dominik's task

calculator/__init__.py

@@ -1 +1 @@
-from .calcurator import add, subtract, divide, multiply
+from .calculator import add, subtract, divide, multiply, square_root, exponentiate

calculator/calcurator.py → calculator/calculator.py

@@ -1,3 +1,6 @@
+import math
+
+
 def add(x, y):
     """Returns the sum of x and y."""
     return x + y
@@ -16,3 +19,11 @@ def divide(x, y):
 def subtract(x, y):
     """Returns the difference between x and y."""
     return x - y
+
+def square_root(x):
+    """Returns the square root of x."""
+    return math.sqrt(x)
+
+def exponentiate(x, y):
+    """Returns x raised to the power of y."""
+    return x ** y

calculator/tests/unit_tests_calculator.py

@@ -1,6 +1,6 @@
 # test_calculator.py
 
-from calculator import add, multiply, divide, subtract
+from calculator import add, multiply, divide, subtract, square_root, exponentiate
 
 def test_addition():
     assert add(5, 3) == 8
@@ -21,3 +21,13 @@ def test_subtraction():
     assert subtract(10, 7) == 3
     assert subtract(5, 5) == 0
     assert subtract(7, 10) == -3
+
+def test_square_root():
+    assert square_root(9) == 3
+    assert square_root(0) == 0
+    assert square_root(36) == 6
+
+def test_exponentiation():
+    assert exponentiate(2, 3) == 8
+    assert exponentiate(5, 0) == 1
+    assert exponentiate(3, -2) == 1/9