toolkit/components/thumbnails/test/browser_thumbnails_bg_bad_url.js


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/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */

add_task(async function thumbnails_bg_bad_url() {
  let url = "invalid-protocol://ffggfsdfsdf/";
  ok(!thumbnailExists(url), "Thumbnail should not be cached already.");
  let numCalls = 0;
  let observer = bgAddPageThumbObserver(url);
  await new Promise(resolve => {
    BackgroundPageThumbs.capture(url, {
      onDone: function onDone(capturedURL) {
        is(capturedURL, url, "Captured URL should be URL passed to capture");
        is(numCalls++, 0, "onDone should be called only once");
        ok(
          !thumbnailExists(url),
          "Capture failed so thumbnail should not be cached"
        );
        resolve();
      },
    });
  });

  await Assert.rejects(observer, /page-thumbnail:error/);
});