Fix task bugs and add search filter

app/service.py

@@ -10,15 +10,18 @@ def list_tasks(status: str | None = None, q: str | None = None) -> list[dict[str
     """Return task records, optionally filtered by status and search text."""
     tasks = load_tasks()
     filtered: list[dict[str, Any]] = []
+    query = q.casefold() if q else None
 
     for task in tasks:
-        # Instructor note: intentional bug for the lab.
-        # This uses the literal string "status" instead of the query parameter value.
-        if status and task["status"] != "status":
+        if status and task["status"] != status:
             continue
 
-        # Instructor note: partial feature for the lab.
-        # The route already accepts `q`, but search is not implemented yet.
+        if query:
+            title = task["title"].casefold()
+            description = task["description"].casefold()
+            if query not in title and query not in description:
+                continue
+
         filtered.append(task)
 
     return filtered
@@ -53,12 +56,9 @@ def complete_task(task_id: int) -> dict[str, Any] | None:
 
     for task in tasks:
         if task["id"] == task_id:
-            updated_task = dict(task)
-            updated_task["status"] = "done"
-            updated_task["completed_at"] = datetime.now(timezone.utc).isoformat()
-
-            # Instructor note: intentional bug for the lab.
-            # The updated task is returned, but the stored list is never updated or saved.
-            return updated_task
+            task["status"] = "done"
+            task["completed_at"] = datetime.now(timezone.utc).isoformat()
+            save_tasks(tasks)
+            return task
 
     return None

requirements.txt

@@ -1,3 +1,5 @@
 fastapi>=0.115,<1.0
 uvicorn>=0.30,<1.0
 pydantic>=2.7,<3.0
+httpx>=0.27,<1.0
+pytest>=8.0,<9.0

tests/test_api.py

@@ -0,0 +1,71 @@
+from __future__ import annotations
+
+from pathlib import Path
+import sys
+
+import pytest
+from fastapi.testclient import TestClient
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+if str(PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(PROJECT_ROOT))
+
+from app import store
+from app.main import app
+
+
+@pytest.fixture(autouse=True)
+def isolated_tasks_file(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
+    source = Path(__file__).resolve().parents[1] / "data" / "tasks.json"
+    temp_data_file = tmp_path / "tasks.json"
+    temp_data_file.write_text(source.read_text(encoding="utf-8"), encoding="utf-8")
+    monkeypatch.setattr(store, "DATA_FILE", temp_data_file)
+
+
+@pytest.fixture
+def client() -> TestClient:
+    return TestClient(app)
+
+
+def test_list_tasks_filters_by_status(client: TestClient) -> None:
+    response = client.get("/tasks", params={"status": "open"})
+
+    assert response.status_code == 200
+    payload = response.json()
+    assert [task["id"] for task in payload] == [1, 3, 4]
+    assert all(task["status"] == "open" for task in payload)
+
+
+def test_list_tasks_filters_by_query_case_insensitive(client: TestClient) -> None:
+    title_response = client.get("/tasks", params={"q": "LAUNCH"})
+    description_response = client.get("/tasks", params={"q": "oauth"})
+
+    assert title_response.status_code == 200
+    assert [task["id"] for task in title_response.json()] == [1]
+    assert description_response.status_code == 200
+    assert [task["id"] for task in description_response.json()] == [2]
+
+
+def test_list_tasks_combines_status_and_query(client: TestClient) -> None:
+    response = client.get("/tasks", params={"status": "open", "q": "workshop"})
+
+    assert response.status_code == 200
+    assert [task["id"] for task in response.json()] == [3]
+
+
+def test_list_tasks_without_query_preserves_default_behavior(client: TestClient) -> None:
+    response = client.get("/tasks")
+
+    assert response.status_code == 200
+    assert [task["id"] for task in response.json()] == [1, 2, 3, 4]
+
+
+def test_complete_task_persists_status(client: TestClient) -> None:
+    complete_response = client.post("/tasks/1/complete")
+    read_response = client.get("/tasks/1")
+
+    assert complete_response.status_code == 200
+    assert complete_response.json()["status"] == "done"
+    assert read_response.status_code == 200
+    assert read_response.json()["status"] == "done"
+    assert read_response.json()["completed_at"] is not None