test_heavy_favicon.js

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/* Any copyright is dedicated to the Public Domain.

 *    http://creativecommons.org/publicdomain/zero/1.0/ */

/*

 * Tests a png with a large file size that can't fit MAX_FAVICON_BUFFER_SIZE,

 * it should be downsized until it can be stored, rather than thrown away.

*/

add_task(async function () {

  let file = do_get_file("noise.png");

  let icon = {

    file,

    uri: NetUtil.newURI(file),

    data: readFileData(file),

    mimetype: "image/png",

};

  // If this should fail, it means MAX_FAVICON_BUFFER_SIZE has been made bigger

  // than this icon. For this test to make sense the icon shoul always be

  // bigger than MAX_FAVICON_BUFFER_SIZE. Please update the icon!

  Assert.ok(

    icon.data.length > Ci.nsIFaviconService.MAX_FAVICON_BUFFER_SIZE,

    "The test icon file size must be larger than Ci.nsIFaviconService.MAX_FAVICON_BUFFER_SIZE"

);

  let pageURI = uri("http://foo.bar/");

  await PlacesTestUtils.addVisits(pageURI);

  let dataURI = await PlacesTestUtils.fileDataToDataURL(

    icon.data,

    icon.mimetype

);

  await PlacesTestUtils.setFaviconForPage(pageURI.spec, icon.uri.spec, dataURI);

  Assert.equal(

    await getFaviconUrlForPage(pageURI),

    icon.uri.spec,

    "A resampled version of the icon should be stored"

);

});