The "does not block an empty store over an already-empty page" test set the
stored page.content to TiptapTransformer.fromYdoc(document,'default') — exactly
the value tiptapJson is computed from — so isDeepStrictEqual(tiptapJson,
page.content) was TRUE and onStoreDocument RETURNED at the unchanged short-circuit
before ever reaching the empty-guard. It exercised the old short-circuit, not the
new guard's `!isEmptyParagraphDoc(page.content)` branch (the only NEW branch
protecting empty existing pages from over-blocking); the condition could be
removed and the test would still pass (false coverage).
Set stored content to an empty paragraph with `content: []` — empty per
isEmptyParagraphDoc but NOT deep-equal to the live doc (which normalizes to a
paragraph with `attrs: { indent: 0 }` and no content key). Execution now skips
the short-circuit and enters the guard; reorient the assertion to "the write is
NOT blocked" (updatePage IS called). Verified the test now FAILS if the
`!isEmptyParagraphDoc(page.content)` condition is removed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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