114 lines
3.4 KiB
TypeScript
114 lines
3.4 KiB
TypeScript
import sharp from "sharp";
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import { describe, expect, it } from "vitest";
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import { sanitizeContentBlocksImages, sanitizeImageBlocks } from "./tool-images.js";
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describe("tool image sanitizing", () => {
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it("shrinks oversized images to <=5MB", async () => {
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const width = 2800;
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const height = 2800;
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const raw = Buffer.alloc(width * height * 3, 0xff);
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const bigPng = await sharp(raw, {
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raw: { width, height, channels: 3 },
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})
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.png({ compressionLevel: 0 })
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.toBuffer();
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expect(bigPng.byteLength).toBeGreaterThan(5 * 1024 * 1024);
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const blocks = [
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{
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type: "image" as const,
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data: bigPng.toString("base64"),
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mimeType: "image/png",
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},
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];
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const out = await sanitizeContentBlocksImages(blocks, "test");
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const image = out.find((b) => b.type === "image");
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if (!image || image.type !== "image") {
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throw new Error("expected image block");
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}
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const size = Buffer.from(image.data, "base64").byteLength;
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expect(size).toBeLessThanOrEqual(5 * 1024 * 1024);
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expect(image.mimeType).toBe("image/jpeg");
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}, 20_000);
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it("sanitizes image arrays and reports drops", async () => {
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const width = 2600;
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const height = 400;
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const raw = Buffer.alloc(width * height * 3, 0x7f);
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const png = await sharp(raw, {
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raw: { width, height, channels: 3 },
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})
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.png({ compressionLevel: 9 })
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.toBuffer();
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const images = [
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{ type: "image" as const, data: png.toString("base64"), mimeType: "image/png" },
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];
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const { images: out, dropped } = await sanitizeImageBlocks(images, "test");
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expect(dropped).toBe(0);
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expect(out.length).toBe(1);
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const meta = await sharp(Buffer.from(out[0].data, "base64")).metadata();
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expect(meta.width).toBeLessThanOrEqual(2000);
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expect(meta.height).toBeLessThanOrEqual(2000);
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}, 20_000);
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it("shrinks images that exceed max dimension even if size is small", async () => {
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const width = 2600;
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const height = 400;
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const raw = Buffer.alloc(width * height * 3, 0x7f);
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const png = await sharp(raw, {
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raw: { width, height, channels: 3 },
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})
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.png({ compressionLevel: 9 })
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.toBuffer();
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const blocks = [
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{
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type: "image" as const,
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data: png.toString("base64"),
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mimeType: "image/png",
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},
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];
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const out = await sanitizeContentBlocksImages(blocks, "test");
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const image = out.find((b) => b.type === "image");
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if (!image || image.type !== "image") {
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throw new Error("expected image block");
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}
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const meta = await sharp(Buffer.from(image.data, "base64")).metadata();
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expect(meta.width).toBeLessThanOrEqual(2000);
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expect(meta.height).toBeLessThanOrEqual(2000);
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expect(image.mimeType).toBe("image/jpeg");
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}, 20_000);
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it("corrects mismatched jpeg mimeType", async () => {
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const jpeg = await sharp({
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create: {
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width: 10,
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height: 10,
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channels: 3,
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background: { r: 255, g: 0, b: 0 },
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},
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})
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.jpeg()
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.toBuffer();
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const blocks = [
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{
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type: "image" as const,
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data: jpeg.toString("base64"),
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mimeType: "image/png",
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},
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];
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const out = await sanitizeContentBlocksImages(blocks, "test");
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const image = out.find((b) => b.type === "image");
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if (!image || image.type !== "image") {
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throw new Error("expected image block");
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}
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expect(image.mimeType).toBe("image/jpeg");
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});
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});
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