michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: function runTests() {
michael@0:   let url = "http://example.com/1";
michael@0:   ok(!thumbnailExists(url), "Thumbnail file should not already exist.");
michael@0:   let numCallbacks = 0;
michael@0:   let doneCallback = function(doneUrl) {
michael@0:     is(doneUrl, url, "called back with correct url");
michael@0:     numCallbacks += 1;
michael@0:     // We will delete the file after the first callback, then check it
michael@0:     // still doesn't exist on the second callback, which should give us
michael@0:     // confidence that we didn't end up with 2 different captures happening
michael@0:     // for the same url...
michael@0:     if (numCallbacks == 1) {
michael@0:       ok(thumbnailExists(url), "Thumbnail file should now exist.");
michael@0:       removeThumbnail(url);
michael@0:       return;
michael@0:     }
michael@0:     if (numCallbacks == 2) {
michael@0:       ok(!thumbnailExists(url), "Thumbnail file should still be deleted.");
michael@0:       // and that's all we expect, so we are done...
michael@0:       next();
michael@0:       return;
michael@0:     }
michael@0:     ok(false, "only expecting 2 callbacks");
michael@0:   }
michael@0:   BackgroundPageThumbs.capture(url, {onDone: doneCallback});
michael@0:   BackgroundPageThumbs.capture(url, {onDone: doneCallback});
michael@0:   yield true;
michael@0: }