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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/preload/resources/preload_helper.js"></script>
<body>
<script>
const invalidImages = {
'invalid data': '/preload/resources/echo-with-cors.py?type=image/svg+xml&content=junk',
missing: '/nothing.png'
}
Object.entries(invalidImages).forEach(([name, url]) => {
promise_test(async t => {
const invalidImageURL = getAbsoluteURL(url)
const link = document.createElement('link');
link.rel = 'preload';
link.as = 'image';
link.href = url;
document.head.appendChild(link);
t.add_cleanup(() => link.remove());
await new Promise(resolve => {
const img = document.createElement('img');
img.src = url;
img.onerror = resolve;
document.body.appendChild(img);
t.add_cleanup(() => img.remove());
});
verifyNumberOfResourceTimingEntries(url, 1);
}, `Preloading an invalid image (${name}) should preload and not re-fetch`)
})
</script>
</body>
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