A test using pytest was added.

test/test.py

@@ -0,0 +1,41 @@
+import pytest
+from src import sample_hello_world_script as hw
+
+
+def setup_function(function):
+    """Performed before each test"""
+    print(f"\nYou have called setUp() for {function.__name__}")
+
+
+def teardown_function(function):
+    """Performed after each test"""
+    print(f"You have called tearDown() for {function.__name__}")
+
+
+# --- Tests  ---
+
+def test_first_function_to_uppercase():
+    input_value = 'Venkatt Guhesan'
+    expected_result = 'VENKATT GUHESAN'
+    actual_result = hw.first_function_to_uppercase(input_value)
+    assert actual_result == expected_result
+
+
+def test_upper():
+    assert 'foo'.upper() == 'FOO'
+
+
+def test_isupper():
+    assert 'FOO'.isupper()
+    assert not 'Foo'.isupper()
+
+
+def test_split():
+    s = 'hello world'
+    assert s.split() == ['hello', 'world']
+
+
+def test_split_raises_type_error():
+    s = 'hello world'
+    with pytest.raises(TypeError):
+        s.split(2)