Failure Mode Examples

Failures are specified per-rule, not per-test, so you can mix success and failure in a single test run:

it "handles mixed outcomes", :mock_openai do
  MockOpenAI.set_responses([
    { match: "Step 1", response: "OK" },
    { match: "Step 2", failure_mode: :timeout },
    { match: "Step 3", response: "Done" }
  ])

  expect(MyService.step1).to eq("OK")
  expect { MyService.step2 }.to raise_error(Timeout::Error)
  expect(MyService.step3).to eq("Done")
end

Available failure modes

Symbol	Behavior
:timeout	Sleeps for configured duration (simulates slow/unresponsive LLM)
:rate_limit	Returns HTTP 429 with rate limit error body
:malformed_json	Returns syntactically invalid JSON
:internal_error	Returns HTTP 500 with server error body
:truncated_stream	Sends partial SSE chunks then closes connection