Add pytest dependency and initial unit test

python/.devcontainer/Dockerfile

@@ -1,11 +1,11 @@
-FROM python:3.11-slim
-
-RUN apt-get update && apt-get install -y build-essential
-
-ARG USERNAME=vscode
-ARG USER_UID=1000
-ARG USER_GID=$USER_UID
-
-RUN groupadd --gid $USER_GID $USERNAME && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME
-USER $USERNAME
-WORKDIR /workspace
+FROM python:3.11-slim
+
+RUN apt-get update && apt-get install -y build-essential
+
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+RUN groupadd --gid $USER_GID $USERNAME && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME
+USER $USERNAME
+WORKDIR /workspace

python/.devcontainer/devcontainer.json

@@ -1,18 +1,19 @@
-{
-  "name": "Python 3.11 Dev Container",
-  "dockerFile": "Dockerfile",
-  "mounts": [
-    "source=${localWorkspaceFolder},target=/workspace,type=bind"
-  ],
-  "settings": {
-    "python.linting.enabled": true,
-    "python.linting.pylintEnabled": true,
-    "python.formatting.provider": "black"
-  },
-  "extensions": [
-    "ms-python.python",
-    "ms-python.vscode-pylance"
-  ],
-  "postCreateCommand": "pip install --upgrade pip",
-  "remoteUser": "vscode"
-}
+{
+  "name": "Python 3.11 Dev Container",
+  "dockerFile": "Dockerfile",
+  "mounts": [
+    "source=${localWorkspaceFolder},target=/workspace,type=bind"
+  ],
+  "settings": {
+    "python.linting.enabled": true,
+    "python.linting.pylintEnabled": true,
+    "python.formatting.provider": "black"
+  },
+  "extensions": [
+    "ms-python.python",
+    "ms-python.vscode-pylance"
+  ],
+  
+  "postCreateCommand": "pip install --upgrade pip && pip install pytest black",
+  "remoteUser": "vscode"
+}

python/.vscode/settings.json

@@ -1,8 +1,8 @@
-{
-    "terminal.integrated.profiles.linux": {
-        "bash": {
-            "path": "bash",
-            "icon": "terminal-bash"
-        }
-    }
+{
+    "terminal.integrated.profiles.linux": {
+        "bash": {
+            "path": "bash",
+            "icon": "terminal-bash"
+        }
+    }
 }

python/00_python_basics/test.py

@@ -1,6 +1,6 @@
-def main():
-    print("Hello, Dev Container World! 🚀")
-    print("Python Version:", __import__('sys').version)
-
-if __name__ == "__main__":
-    main()
+def main():
+    print("Hello, Dev Container World! 🚀")
+    print("Python Version:", __import__('sys').version)
+
+if __name__ == "__main__":
+    main()

python/01_python_tooling/sum_calculator.py

@@ -0,0 +1,19 @@
+# Datei: sum_calculator.py
+
+def calculate_cumulative_sum(limit):
+    """
+    Soll die kumulative Summe von 0 bis limit berechnen.
+    """
+    total = 0
+    
+    for i in range(limit):
+        total += i
+    return total
+
+if __name__ == "__main__":
+    test_number = 5
+
+    result = calculate_cumulative_sum(test_number)
+    
+    print(f"Die Zahl ist: {test_number}")
+    print(f"Ergebnis der Summe: {result}")

python/01_python_tooling/test_sum_calculator.py

@@ -0,0 +1,26 @@
+# Datei: test_sum_calculator.py
+
+from sum_calculator import calculate_cumulative_sum
+
+def test_sum_for_zero():
+    """Testet den Randfall, wenn die Obergrenze 0 ist."""
+    # Arrange: Testdaten
+    limit = 0
+    # Act: Funktion aufrufen
+    result = calculate_cumulative_sum(limit)
+    # Assert: Überprüfen des Ergebnisses (0 erwartet)
+    assert result == 0
+
+def test_sum_for_five():
+    """Testet den allgemeinen Fall für die Zahl 5 (0+1+2+3+4+5 = 15)."""
+    # Arrange: Testdaten
+    limit = 5
+    # Act: Funktion aufrufen
+    result = calculate_cumulative_sum(limit)
+    # Assert: Überprüfen des Ergebnisses (15 erwartet)
+    assert result == 15
+    
+def test_sum_is_correct_type():
+    """Testet, ob die Funktion einen Integer zurückgibt."""
+    # Arrange, Act, Assert
+    assert isinstance(calculate_cumulative_sum(3), int)