How do you mock an external HTTP API in Django tests?
PICTURE THIS: A REST CALL
Simple meaning
Patch the client function with unittest.mock or use responses/httpx mock to return canned JSON.
WHY — Testing instead of guessing?
Why interviewers care about Testing:
question about Testing.
trade-offs, and what you would actually do on a Python project - not buzzwords.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Patch the client function
with unittest.mock or use responses/httpx mock to return canned JSON.
- 2Never hit the real
network in unit tests.
- 3Assert that your view
handles both 200 payloads and error statuses.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Patch the client function with unittest.mock or use responses/httpx mock to return canned JSON. Never hit the real network in unit tests.