initial commit

.gitignore

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+venv*

pytest.ini

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+[pytest]
+junit_family = xunit1

src/calculator.py

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+def add(a, b): 
+    checkInputs(a, b) 
+    return a + b 
+
+def subtract(a, b): 
+    checkInputs(a, b) 
+    return a - b 
+
+def multiply(a, b): 
+    checkInputs(a, b) 
+    return a * b 
+
+def divide(a, b): 
+    checkInputs(a, b) 
+    return a / b 
+
+def checkInputs(a, b): 
+    if not isinstance(a, (int, float)) or not isinstance(b, (int, float)): 
+        raise TypeError("Inputs must be either int or float!")

test_addition.py

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+from src.calculator import add 
+import pytest 
+
+def test_add(): 
+    result = add(3, 4) 
+    assert result == 7 
+
+def test_add_string(): 
+    with pytest.raises(TypeError): 
+        add("string", 4)