import { describe, expect, test } from "bun:test";
import { validateImageUploadFile } from "./cdn-images";

const png = new Uint8Array([137, 80, 78, 71, 13, 10, 26, 10]);

describe("image upload validation", () => {
  test("accepts a valid PNG signature", () => {
    expect(() =>
      validateImageUploadFile(
        { name: "avatar.png", type: "image/png", size: png.length },
        png
      )
    ).not.toThrow();
  });

  test("rejects content that does not match the declared type", () => {
    expect(() =>
      validateImageUploadFile(
        { name: "avatar.png", type: "image/png", size: 4 },
        new Uint8Array([1, 2, 3, 4])
      )
    ).toThrow("contents do not match");
  });

  test("rejects empty files", () => {
    expect(() =>
      validateImageUploadFile({ name: "avatar.png", type: "image/png", size: 0 })
    ).toThrow("cannot be empty");
  });
});