555881ebc8
* performance harness - the empirical root Assisted-by: Claude Opus 4.8 * 210.36ms -> 2.67ms per streamed token Assisted-by: Claude Opus 4.8 * 11.58ms -> 0.62ms per streamed token Assisted-by: Claude Opus 4.8 * 22.02ms -> 3.33ms per streamed token Assisted-by: Claude Opus 4.8 * 3.07ms -> 1.36ms per streamed token at 40 messages Assisted-by: Claude Opus 4.8 --------- Co-authored-by: Zach Winter <dmtommy@icloud.com>
38 lines
1.4 KiB
TypeScript
38 lines
1.4 KiB
TypeScript
// Guards the lazy-body behaviour of the shared collapsible wrappers.
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//
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// bits-ui's Collapsible.Content renders its children unconditionally and only
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// sets `hidden`, so before this was gated a collapsed tool result kept its whole
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// body in the DOM and re-rendered it on every streamed token (measured at
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// ~41ms/section/token for a 200KB result). These tests pin the fix: closed means
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// not rendered, and opening still mounts the body.
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import { describe, it, expect } from 'vitest';
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import { render } from 'vitest-browser-svelte';
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import { tick } from 'svelte';
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import CollapsibleLazyBodyHarness from './components/CollapsibleLazyBodyHarness.svelte';
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const MARKER = 'collapsible-body-marker';
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describe('collapsible wrappers render their body lazily', () => {
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for (const variant of ['content', 'terminal'] as const) {
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it(`${variant}: body is absent while closed and present once open`, async () => {
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const screen = render(CollapsibleLazyBodyHarness, { variant, open: false });
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await tick();
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expect(document.body.textContent).not.toContain(MARKER);
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await screen.rerender({ variant, open: true });
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await tick();
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expect(document.body.textContent).toContain(MARKER);
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// And it unmounts again on close, so a collapsed block stops costing
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// anything during streaming.
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await screen.rerender({ variant, open: false });
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await tick();
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expect(document.body.textContent).not.toContain(MARKER);
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});
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}
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});
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