import { assertEquals } from "assert";
import { stubbingWarn } from "../helpers.ts";
import parseHash from "../../public/png/parseHash.js";

Deno.test(
  "returns null if hash cannot be parsed",
  stubbingWarn(() => {
    const testCases = [
      // Missing fields
      "#null",
      "#{}",
      "#{%22name%22:%22image.png%22}",
      "#{%22bytes%22:%22AQID%22}",
      // Invalid JSON
      "",
      "#{%22name%22:%22small.png%22,%22bytes%22:%22iAQID",
    ];

    for (const testCase of testCases) {
      assertEquals(
        parseHash(testCase),
        null,
        `Parsing ${testCase} should fail`,
      );
    }
  }),
);

Deno.test("parses hashes", () => {
  const hash = "#{%22name%22:%22small.png%22,%22bytes%22:%22AQID%22}";
  assertEquals(parseHash(hash), {
    name: "small.png",
    bytes: new Uint8Array([1, 2, 3]),
  });
});