Learn from Cheng Huang's modernization article - #1087
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KyleAMathews wants to merge 6 commits into
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KyleAMathews wants to merge 6 commits into
KyleAMathews wants to merge 6 commits into
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Inspired by Cheng Huang's article on AI-assisted development, this introduces a contract-based testing approach for the live query system. Changes: - Add contracts.ts with precondition/postcondition/invariant utilities - Add D2 multiplicity contracts to CollectionSubscriber.sendChangesToPipeline - Add contract verification test suite (16 tests) The contracts verify: - D2 multiplicity stays at 1 for all visible items - sentToD2Keys accurately tracks keys sent to D2 pipeline - Insert/delete operations maintain consistent tracking state Contracts can be disabled in production via NODE_ENV=production for performance.
🦋 Changeset detectedLatest commit: cabc33d The changes in this PR will be included in the next version bump. This PR includes changesets to release 12 packages
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Size Change: +855 B (+0.96%) Total Size: 90.4 kB
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Introduces property-based testing to explore edge cases in the live query system. Tests use fast-check to generate random sequences of operations and verify that invariants hold across all inputs. Properties tested: - D2 multiplicity invariant (no duplicate keys) - State consistency (live query matches expected state) - Delete-insert cycles (re-insert always succeeds after delete) - Filtered query correctness (only matching items present) - Batch operation consistency (sequential vs batched produce same result) - Stress testing (100-200 operations maintain invariants) All 9 property-based tests run 100 iterations each (20 for stress tests).
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Closing as stale/superseded on the exact D2 path. Against pinned origin/main , an independent weighted-multiset model stays at exactly one D2 contribution through insert, duplicate insert, stale-before update, stale-payload delete, and reinsert. The hostile reconciler fails first at duplicate insert (weight 2), and the current 19-test D2 reconciliation oracle suite is GREEN. The production fix lineage is #1054 (), with stronger oracle coverage in #1816 (). Preserving Kyle Mathews/Claude experimental credit and Cheng Huang attribution; reusable runtime-contract ideas remain a future live-query diagnostics cluster. |
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