Wrapping Up
No one technique detects every problem. Strategic investments in a variety of testing techniques are the best way to get a great return on your testing effort. REPL-based testing helps us develop in small increments, making sure that each expression does what we expect. Example-based testing allows us to capture any interesting examples we discover during REPL testing, ensuring that special cases are covered by any future changes. Property-based testing clarifies our thinking and provides coverage from a wide variety of inputs. These techniques work together to give us validation that our code does what we expect.
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