https://thaig2pro.github.io/en/tags/testing/Recent content in Testing on My BlogHugo -- 0.146.0enWed, 23 Sep 2026 14:00:00 +0700https://thaig2pro.github.io/en/posts/cong-thuc-tru-hai-lan/Wed, 23 Sep 2026 14:00:00 +0700https://thaig2pro.github.io/en/posts/cong-thuc-tru-hai-lan/An acceptance criterion defined available stock as intake minus allocated minus sold. Read literally it gave 80; production showed 90. The gap was exactly the units counted twice.https://thaig2pro.github.io/en/posts/bug-import-tra-nham-bang/Tue, 22 Sep 2026 17:00:00 +0700https://thaig2pro.github.io/en/posts/bug-import-tra-nham-bang/A quota import took a product id and looked it up in a different table. Auto-increment made the ids overlap, so every run changed exactly one row and nobody noticed.https://thaig2pro.github.io/en/posts/lock-bi-danh-roi-khi-refactor/Mon, 21 Sep 2026 10:00:00 +0700https://thaig2pro.github.io/en/posts/lock-bi-danh-roi-khi-refactor/A row lock vanished during a refactor. The suite stayed green because sqlite silently ignores FOR UPDATE. How I made the lock visible to a test, and what it cost.