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chromium/third_party/blink/web_tests/http/tests/security/img-with-failed-cors-check-fails-to-load.html 

<body>
This test passes if the image below does not load.
<script>
if (window.testRunner)
    testRunner.dumpAsText();

var img = new Image();

img.addEventListener('load', function(event) {
    alert('FAIL: The image loaded.');
}, false);

img.addEventListener('error', function(event) {
    alert('PASS: The error event was called.');
}, false);

img.crossOrigin = "";
img.src = "http://localhost:8080/security/resources/red200x100.png";
document.body.appendChild(img);
</script>