feat: test caeser added

Author: Darshan-KC

.github/workflows/python-app.yml

@@ -34,6 +34,6 @@ jobs:
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    #- name: Test with pytest
-    #  run: |
-    #    pytest
+    - name: Test with pytest
+      run: |
+        pytest

.gitignore

@@ -1 +1,3 @@
 venv/
+__pycache__/
+

test/test_caeser.py

@@ -0,0 +1,24 @@
+import pytest
+from caeser import Caeser
+
+@pytest.fixture
+def caeser():
+    return Caeser(3)  # Use shift=3 for testing
+
+def test_encrypt(caeser):
+    assert caeser.encrypt("abc") == "def"
+    assert caeser.encrypt("xyz") == "abc"
+    assert caeser.encrypt("Hello") == "Khoor"
+    assert caeser.encrypt("Python 3.11!") == "Sbwkrq 3.11!"
+
+def test_decrypt(caeser):
+    assert caeser.decrypt("def") == "abc"
+    assert caeser.decrypt("abc") == "xyz"
+    assert caeser.decrypt("Khoor") == "Hello"
+    assert caeser.decrypt("Sbwkrq 3.11!") == "Python 3.11!"
+
+def test_no_change_for_non_alphabetic(caeser):
+    assert caeser.encrypt("1234567890") == "1234567890"
+    assert caeser.decrypt("1234567890") == "1234567890"
+    assert caeser.encrypt("!@#$%^&*()") == "!@#$%^&*()"
+    assert caeser.decrypt("!@#$%^&*()") == "!@#$%^&*()"