30829704425
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Ran 03 Aug 2026 04:04PM UTC

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Committed 03 Aug 2026 03:54PM UTC coverage: 83.653%. Remained the same

Build # 30829704425

Build Type

Pull #2384

github

Committed by

Flix6x

Commit Message

Require new tests to be proven capable of failing

A test that never fails asserts nothing, and reads exactly like one that works.
This adds the convention: break what the test covers, watch it go red, restore.

The prompt is a real miss rather than a hypothetical. A balance-group scenario
in test_highspy_equivalence.py passed with the constraint it was named after
entirely disabled: both devices in the node had a free flow band and no cost
incentive, so the optimum was zero flow whether or not the balance was
enforced. Only this check caught it, and the failure mode generalises --
optimisation tests over devices with no reason to move are satisfied trivially.

Adds a section to the testing instructions with the vacuous/binding contrast,
a note that equivalence tests need the compared code path actually reached on
each side, and the ask to say in the PR description what was broken to prove
it -- reviewers cannot tell a binding test from a vacuous one by reading it.
Also surfaces it in CLAUDE.md's most-missed list.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X2jLjsQzwztDc7Nxz1ozmQ
Signed-off-by: F.N. Claessen <claessen@seita.nl>

Pull Request Pull Request #2384: Require new tests to be proven capable of failing

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16995 of 20316 relevant lines covered (83.65%)

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ID	Job ID	Ran	Files	Coverage
1	30829704425.1	03 Aug 2026 04:04PM UTC	175	83.65	GitHub Action Run

FlexMeasures / flexmeasures / 30829704425
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