An HTTP API for sensor data

A running server does not imply correct request handling. First test paths, missing inputs, and safe responses.

Requires fastapi and httpx. Use uvicorn additionally only if you choose browser testing.

If the required package is missing, run %pip install fastapi==0.162.0 httpx==0.28.1 in a Colab or Jupyter code cell.

Starting conditions

The FastAPI /readings path accepts device, start, and end. TestClient sends requests without starting an actual server.

Procedure

1. Execute the provided valid request and check the status code and JSON fields.
2. Execute a start>end request and distinguish it from a normal response.

Results to retain

• Response examples for valid and invalid requests.

Starting conditions

Test a missing device, start=abc, nonexistent device m9, and nonexistent path /unknown.

Procedure

1. Tabulate the status codes and response bodies for the four requests.
2. Decide which situation to handle as an empty list: absent data or an invalid request.
3. Use asserts to fix two valid and invalid request cases for checking after later changes.

Results to retain

• A table for 4 request types and a small regression test.

Starting conditions

You want to call the SQLite query function from the previous unit inside the API.

Procedure

1. Mark where to replace reading from a temporary list with a storage function call.
2. Separate API input validation from DB query responsibilities.
3. Check whether one response identifies the device, time, and unit clearly enough for a user to interpret it.

Results to retain

• API–storage integration code or a function contract table.

• FastAPI · request testing