test: assert shift-by-zero identity for arith_uint256 #34415

1. 
   AnmolM-777 commented at 8:38 pm on January 26, 2026: none

   This adds explicit unit test assertions that left- and right-shifting arith_uint256 values by zero bits is identity-preserving.

   While implicitly covered by existing loops, making this invariant explicit improves clarity and guards against future regressions.

2. test: assert shift-by-zero identity for arith_uint256 a007aa6588
3. DrahtBot added the label Tests on Jan 26, 2026
4. 
   DrahtBot commented at 8:38 pm on January 26, 2026: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/34415.

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5. 
   l0rinc commented at 8:44 pm on January 26, 2026: contributor

   NACK, this is just noise
6. 
   AnmolM-777 commented at 8:56 pm on January 26, 2026: none

   Thanks for taking a look! I understand the concern about redundancy and agree that keeping the test suite focused is important. I’m happy to close this PR and will keep this feedback in mind for future contributions.
7. AnmolM-777 closed this on Jan 26, 2026

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AnmolM-777 DrahtBot l0rinc

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