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perf(test): reduce lock wait and fixture setup overhead

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This commit is contained in:
Peter Steinberger
2026-02-14 01:42:42 +00:00
parent 0c00dd92a4
commit db8cabedde
3 changed files with 69 additions and 66 deletions
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60
src/web/media.test.ts
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@@ -11,6 +11,9 @@ let fixtureRoot = "";
let fixtureFileCount = 0;
let largeJpegBuffer: Buffer;
let tinyPngBuffer: Buffer;
let alphaPngBuffer: Buffer;
let fallbackPngBuffer: Buffer;
let fallbackPngCap = 0;
async function writeTempFile(buffer: Buffer, ext: string): Promise<string> {
const file = path.join(fixtureRoot, `media-${fixtureFileCount++}${ext}`);
@@ -50,6 +53,29 @@ beforeAll(async () => {
})
.png()
.toBuffer();
alphaPngBuffer = await sharp({
create: {
width: 64,
height: 64,
channels: 4,
background: { r: 255, g: 0, b: 0, alpha: 0.5 },
},
})
.png()
.toBuffer();
const size = 96;
const raw = buildDeterministicBytes(size * size * 4);
fallbackPngBuffer = await sharp(raw, { raw: { width: size, height: size, channels: 4 } })
.png()
.toBuffer();
const smallestPng = await optimizeImageToPng(fallbackPngBuffer, 1);
fallbackPngCap = Math.max(1, smallestPng.optimizedSize - 1);
const jpegOptimized = await optimizeImageToJpeg(fallbackPngBuffer, fallbackPngCap);
if (jpegOptimized.buffer.length >= smallestPng.optimizedSize) {
throw new Error(
`JPEG fallback did not shrink below PNG (jpeg=${jpegOptimized.buffer.length}, png=${smallestPng.optimizedSize})`,
);
}
});
afterAll(async () => {
@@ -260,18 +286,7 @@ describe("web media loading", () => {
});
it("preserves PNG alpha when under the cap", async () => {
const buffer = await sharp({
create: {
width: 64,
height: 64,
channels: 4,
background: { r: 255, g: 0, b: 0, alpha: 0.5 },
},
})
.png()
.toBuffer();
const file = await writeTempFile(buffer, ".png");
const file = await writeTempFile(alphaPngBuffer, ".png");
const result = await loadWebMedia(file, 1024 * 1024);
@@ -282,28 +297,13 @@ describe("web media loading", () => {
});
it("falls back to JPEG when PNG alpha cannot fit under cap", async () => {
const size = 96;
const raw = buildDeterministicBytes(size * size * 4);
const pngBuffer = await sharp(raw, { raw: { width: size, height: size, channels: 4 } })
.png()
.toBuffer();
const smallestPng = await optimizeImageToPng(pngBuffer, 1);
const cap = Math.max(1, smallestPng.optimizedSize - 1);
const jpegOptimized = await optimizeImageToJpeg(pngBuffer, cap);
const file = await writeTempFile(fallbackPngBuffer, ".png");
if (jpegOptimized.buffer.length >= smallestPng.optimizedSize) {
throw new Error(
`JPEG fallback did not shrink below PNG (jpeg=${jpegOptimized.buffer.length}, png=${smallestPng.optimizedSize})`,
);
}
const file = await writeTempFile(pngBuffer, ".png");
const result = await loadWebMedia(file, cap);
const result = await loadWebMedia(file, fallbackPngCap);
expect(result.kind).toBe("image");
expect(result.contentType).toBe("image/jpeg");
expect(result.buffer.length).toBeLessThanOrEqual(cap);
expect(result.buffer.length).toBeLessThanOrEqual(fallbackPngCap);
});
});