// The toolbar icons in icons/ are drawn by script/lib/icons.js (`make icons`).
// Each committed file must hold exactly the image it draws, the same IHDR and
// every pixel, so the drawing and the files cannot drift apart. The compressed
// bytes are not compared: the committed files were compressed by stock zlib,
// and node's bundled zlib compresses the same pixels differently.

const fs = require("fs");
const path = require("path");

const { icons } = require("../manifest/chrome.json");
const { drawIcon, decodePng } = require("../script/lib/icons");

describe("toolbar icons", () => {
    test.each(Object.entries(icons))(
        "the %spx icon %s holds the image script/lib/icons.js draws",
        (size, file) => {
            const side = Number(size);
            const committed = decodePng(
                fs.readFileSync(path.join(__dirname, "..", file)),
            );
            const drawn = decodePng(drawIcon(side));

            expect(committed.header).toEqual(drawn.header);
            // Each row is its filter type byte, then 4 bytes per pixel.
            expect(drawn.rows.length).toBe(side * (side * 4 + 1));
            expect(committed.rows.length).toBe(drawn.rows.length);
            // The offset of the first byte that differs, not a diff of all.
            expect(
                committed.rows.findIndex((byte, i) => byte !== drawn.rows[i]),
            ).toBe(-1);
        },
    );
});