SnapOtter/tests/integration/vignette.test.ts

/**
 * Integration tests for the vignette tool (/api/v1/tools/vignette).
 *
 * Covers vignette application, corner-darker-than-source assertion,
 * dimension preservation, and schema validation.
 */

import { readFileSync } from "node:fs";
import { join } from "node:path";
import sharp from "sharp";
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("Vignette", () => {
  it("applies vignette effect 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/vignette",
      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.processedSize).toBeGreaterThan(0);
  });

  it("corner pixel is darker than the original source corner", async () => {
    // Create a known white image so we can measure darkening
    const whiteBuf = await sharp({
      create: { width: 100, height: 100, channels: 3, background: { r: 255, g: 255, b: 255 } },
    })
      .png()
      .toBuffer();

    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "white.png", contentType: "image/png", content: whiteBuf },
      {
        name: "settings",
        content: JSON.stringify({ strength: 0.8, color: "#000000" }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/vignette",
      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}` },
    });

    const rawMeta = await sharp(dlRes.rawPayload)
      .removeAlpha()
      .raw()
      .toBuffer({ resolveWithObject: true });
    const { data } = rawMeta;
    // Corner pixel (0,0) should be darker than 255 (the original white)
    const cornerR = data[0];
    expect(cornerR).toBeLessThan(255);
  });

  it("preserves dimensions", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG },
      {
        name: "settings",
        content: JSON.stringify({ strength: 0.5 }),
      },
    ]);

    const res = await app.inject({
      method: "POST",
      url: "/api/v1/tools/vignette",
      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}` },
    });
    const meta = await sharp(dlRes.rawPayload).metadata();
    expect(meta.width).toBe(200);
    expect(meta.height).toBe(150);
  });

  it("rejects strength above maximum", async () => {
    const { body, contentType } = createMultipartPayload([
      { name: "file", filename: "test.png", contentType: "image/png", content: PNG },
      { name: "settings", content: JSON.stringify({ strength: 2 }) },
    ]);

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

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