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test(ui-primitives): cover lazy viewport highlighting

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This commit is contained in:
imccyu 2026-08-31 22:11:39 +08:00
parent faa61ada74
commit 07be260245
1 changed files with 13 additions and 0 deletions
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13
packages/client/ui-primitives/tests/highlight-viewport.client.spec.tsx
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@ -125,6 +125,19 @@ describe('viewport-activated syntax highlighting', () => {
expect(view.container.querySelector('pre.shiki')).not.toBeNull()
})
it('keeps an intersecting streaming block plain until its lazy grammar loads', async () => {
const view = render(
<CodeBlock code="print(1)" lang="python" streaming {...markdownLabels.code} />,
)
const block = view.container.querySelector('.md-code-block')!
const observer = IntersectionObserverStub.instances[0]!
act(() => { observer.intersect(block, true) })
expect(block.querySelector('pre.shiki')).toBeNull()
await waitFor(() => { expect(block.querySelector('pre.shiki')).not.toBeNull() }, { timeout: 5_000 })
})
it('keeps a read card plain until that card intersects', async () => {
const view = render(
<ReadBlock