SnapOtter/tests/integration/lqip-placeholder.test.ts

/**
 * Integration tests for the lqip-placeholder tool (/api/v1/tools/lqip-placeholder).
 *
 * Covers LQIP generation, data URI prefix, strategy variants, output size, and schema validation.
 */

import { readFileSync } from "node:fs";
import { join } from "node:path";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";

const FIXTURES = join(__dirname, "..", "fixtures");
const PNG = readFileSync(join(FIXTURES, "test-200x150.png"));

let testApp: TestApp;
let app: TestApp["app"];
let adminToken: string;

beforeAll(async () => {
  testApp = await buildTestApp();
  app = testApp.app;
  adminToken = await loginAsAdmin(app);
}, 30_000);

afterAll(async () => {
  await testApp.cleanup();
}, 10_000);

describe("LQIP Placeholder", () => {
  it("generates a placeholder with default settings", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG },
      { name: "settings", content: JSON.stringify({}) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/lqip-placeholder",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(200);
    const result = JSON.parse(res.body);
    expect(result.downloadUrl).toBeDefined();
    expect(result.dataUri).toMatch(/^data:image\//);
    expect(result.width).toBeGreaterThan(0);
    expect(result.height).toBeGreaterThan(0);
    expect(result.bytes).toBeGreaterThan(0);
    expect(result.strategy).toBe("blur");
    expect(result.html).toContain("<img");
    expect(result.css).toContain("background-image");
  });

  it("generates a solid-color placeholder", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG },
      { name: "settings", content: JSON.stringify({ strategy: "solid" }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/lqip-placeholder",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(200);
    const result = JSON.parse(res.body);
    expect(result.dataUri).toMatch(/^data:image\//);
    expect(result.strategy).toBe("solid");
  });

  it("produces output under 5 KiB", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG },
      { name: "settings", content: JSON.stringify({ width: 16, blur: 2 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/lqip-placeholder",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(200);
    const result = JSON.parse(res.body);

    const dlRes = await app.inject({
      method: "GET",
      url: result.downloadUrl,
      headers: { authorization: `Bearer ${adminToken}` },
    });
    expect(dlRes.rawPayload.length).toBeLessThan(5 * 1024);
  });

  it("rejects width above maximum (200)", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG },
      { name: "settings", content: JSON.stringify({ width: 200 }) },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/lqip-placeholder",
      headers: {
        authorization: `Bearer ${adminToken}`,
        "content-type": contentType,
      },
      body,
    });

    expect(res.statusCode).toBe(400);
  });
});