Debugging

Purpose

Find the actual cause of a defect, not a change that makes the symptom disappear. Debugging is a search problem, and the method is binary search over hypotheses.

When to Use

• A test fails and the reason is not obvious from the assertion.
• Production behavior differs from local behavior.
• An intermittent or timing-dependent failure.
• A performance regression with no obvious cause.
• A bug that "came back" after being fixed.

Capabilities