Add unit tests

backend/src/routes/test_projects.py

@@ -0,0 +1,113 @@
+from datetime import datetime, timedelta
+
+import pytest
+from fastapi.testclient import TestClient
+from fastapi import status
+from sqlmodel import create_engine, Session, SQLModel, select
+from sqlmodel.pool import StaticPool
+
+from src import database
+from src.main import app
+from src.models.project import Project
+
+
+@pytest.fixture(name="session")
+def session_fixture():
+    """Creates a mock session, that access an in-memory temporary database."""
+
+    engine = create_engine(
+        "sqlite://",  # In memory database
+        connect_args={"check_same_thread": False},  # FastAPI's async functions may execute on different threads
+        poolclass=StaticPool  # All threads should access shared memory
+    )
+    SQLModel.metadata.create_all(engine)
+    with Session(engine) as session:
+        yield session
+
+
+@pytest.fixture(name="client")
+def client_fixture(session: Session):
+    """Creates a FastAPI TestClient with a mocked session dependency. This causes FastAPI to inject the fake session
+    into path operation functions, so that we have full control over the mocked database."""
+
+    def get_session_override():
+        return session
+
+    app.dependency_overrides[database.get_session] = get_session_override
+    client = TestClient(app)
+    yield client
+    app.dependency_overrides.clear()
+
+
+def test_project_create(client: TestClient):
+    project = {"name": "Uni"}
+    response = client.post("/projects/", json=project)
+    response_data: dict = response.json()
+    assert response.status_code == status.HTTP_201_CREATED
+    assert project.items() <= response_data.items()  # Is subset, i.e. was all send data saved?
+    assert response_data["id"]  # Not empty?
+    assert response_data["creation_date"]  # Not empty?
+
+
+def test_project_get(client: TestClient, session: Session):
+    # Fill database
+    project = Project(name="Uni", creation_date=datetime.now())
+    session.add(project)
+    session.commit()
+    # Request data from API
+    response = client.get("/projects/Uni")
+    response_data = response.json()
+    assert response.status_code == status.HTTP_200_OK
+    assert response_data["id"]  # Not empty?
+    assert response_data["name"] == project.name
+    assert response_data["creation_date"] == project.creation_date.isoformat()
+
+
+def test_project_update(client: TestClient, session: Session):
+    # Fill database
+    project = Project(name="Uni", creation_date=datetime.now())
+    session.add(project)
+    session.commit()
+    # Perform update via API
+    project_updates = {"name": "UNI"}
+    response = client.patch("/projects/Uni", json=project_updates)
+    response_data = response.json()
+    assert response.status_code == status.HTTP_200_OK
+    assert response_data["id"]  # Not empty?
+    assert response_data["name"] == project_updates["name"]
+    assert response_data["creation_date"] == project.creation_date.isoformat()
+
+
+def test_project_delete(client: TestClient, session: Session):
+    # Fill database
+    project = Project(name="Uni", creation_date=datetime.now())
+    session.add(project)
+    session.commit()
+    # Delete via API
+    response = client.delete("/projects/Uni")
+    response_data = response.json()
+    assert response.status_code == status.HTTP_204_NO_CONTENT
+    assert session.exec(select(Project).where(Project.name == "Uni")).first() is None  # Element deleted from database?
+
+
+def test_project_get_list(client: TestClient, session: Session):
+    pass
+    # Fill database
+    project_uni = Project(name="Uni", creation_date=datetime.now())
+    project_sport = Project(name="Sport", creation_date=datetime.now())
+    session.add(project_uni)
+    session.add(project_sport)
+    session.commit()
+    # Request data from API
+    response = client.get("/projects/")
+    response_data = response.json()
+    assert response.status_code == status.HTTP_200_OK
+    assert len(response_data) == 2
+
+    assert response_data[0]["name"] == project_uni.name
+    assert response_data[0]["id"]  # Not empty?
+    assert response_data[0]["creation_date"] == project_uni.creation_date.isoformat()
+
+    assert response_data[1]["name"] == project_sport.name
+    assert response_data[1]["id"]  # Not empty?
+    assert response_data[1]["creation_date"] == project_sport.creation_date.isoformat()