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Six scripted pi sub-agent runs (3 tool regimes × 2 models) rehearsed the exercise; deterministic gate = solution test + approved file. Key results: mandated CLI triples cost on the strong model (4:06 vs 0:39, PASS both); weak model fails only under the mandate (A+Q), passes when free or optional. Drift documented with code: scorer.updateSelection left inside the extracted method (A+Q, C+Q). Harness in tools/rehearse; summary in rehearsal-findings.md; per-run evidence in rehearsal-runs/; cheat sheet in rehearse-with-agent.md corrected (lambda-typed parameters unsupported).
28 lines
1.4 KiB
Plaintext
28 lines
1.4 KiB
Plaintext
# Rehearsal workspace — refactoring task
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You are refactoring `src/main/java/codingdojo/LongRangeForecasts.java` in this
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Maven project. Run `mvn -q test` after each change (mvn is on your PATH). It may
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fail — that is expected: the dependency on `Scorer` makes the method untestable —
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but the code must still *compile*.
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## Goal
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In `LongRangeForecasts.longRangeForecast()`, the loop over `interestingDates`
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collects weather by calling `scorer` (an unwanted external dependency).
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1. Introduce a lambda for the scorer-dependent code and move its definition to
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the top of the method, leaving the invocation where it is. (No refactoring
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tool supports this — do it as a minimal manual edit.)
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2. Extract the weather-collection loop into a new method `collectExpectedWeather`
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that takes the lambda as a parameter (suggested type `LongFunction<Boolean>`).
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3. Add the lambda as a parameter to `longRangeForecast` itself: the signature
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must become `longRangeForecast(LongFunction<Boolean> dayOffsetToWeather)`,
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with a public no-arg overload `longRangeForecast()` that delegates and wraps
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the `scorer` field in a lambda. Do not keep the `String quarter` parameter.
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(`java-refactor change-method-signature` or `java-refactor introduce-param`
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may help; fall back to a minimal manual edit if no subcommand can do it.)
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4. Stop. Report the final diff.
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## Tool rules (variant B)
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You may change code with your normal file-editing tools.
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