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Test Info:
/* Any copyright is dedicated to the Public Domain.
add_task(async function thumbnails_bg_bad_url() {
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/);
});