import { afterAll, afterEach, beforeAll, describe, expect, it } from "bun:test"; import { existsSync, rmSync } from "node:fs"; import type { Server } from "bun"; import { fetchImageFromUrl } from "../../src/server/services/image.service.ts"; const TEST_UPLOADS_DIR = "test-uploads"; // 1x1 transparent PNG (smallest valid PNG) const TINY_PNG = new Uint8Array([ 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x08, 0x06, 0x00, 0x00, 0x00, 0x1f, 0x15, 0xc4, 0x89, 0x00, 0x00, 0x00, 0x0a, 0x49, 0x44, 0x41, 0x54, 0x78, 0x9c, 0x62, 0x00, 0x00, 0x00, 0x02, 0x00, 0x01, 0xe2, 0x21, 0xbc, 0x33, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82, ]); let server: Server; let baseUrl: string; beforeAll(() => { server = Bun.serve({ port: 0, fetch(req) { const url = new URL(req.url); if (url.pathname === "/image.png") { return new Response(TINY_PNG, { headers: { "Content-Type": "image/png" }, }); } if (url.pathname === "/page.html") { return new Response("", { headers: { "Content-Type": "text/html" }, }); } return new Response("Not found", { status: 404 }); }, }); baseUrl = `http://localhost:${server.port}`; }); afterAll(() => { server.stop(true); }); describe("Image Service", () => { afterEach(() => { if (existsSync(TEST_UPLOADS_DIR)) { rmSync(TEST_UPLOADS_DIR, { recursive: true }); } }); describe("fetchImageFromUrl", () => { it("fetches a valid image URL and saves to disk", async () => { const imageUrl = `${baseUrl}/image.png`; const result = await fetchImageFromUrl(imageUrl, TEST_UPLOADS_DIR); expect(result.filename).toMatch(/^\d+-[\w-]+\.png$/); expect(result.sourceUrl).toBe(imageUrl); const filePath = `${TEST_UPLOADS_DIR}/${result.filename}`; expect(existsSync(filePath)).toBe(true); }); it("rejects non-image content type", async () => { await expect( fetchImageFromUrl(`${baseUrl}/page.html`, TEST_UPLOADS_DIR), ).rejects.toThrow("Invalid content type"); }); it("rejects invalid URL format", async () => { await expect( fetchImageFromUrl("not-a-url", TEST_UPLOADS_DIR), ).rejects.toThrow("Invalid URL format"); }); it("rejects non-HTTP protocols", async () => { await expect( fetchImageFromUrl("ftp://example.com/image.png", TEST_UPLOADS_DIR), ).rejects.toThrow("URL must use HTTP or HTTPS"); }); it("rejects 404 responses", async () => { await expect( fetchImageFromUrl(`${baseUrl}/missing.jpg`, TEST_UPLOADS_DIR), ).rejects.toThrow("HTTP 404"); }); }); });