third_party/WebKit/LayoutTests/fast/canvas/drawImage-with-broken-image.html

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>

<script>

// Create an image with invalid data.
var invalidImage = new Image();
invalidImage.src = 'resources/shadow-offset.js';

var ctx = document.createElement("canvas").getContext('2d');
function draw() {
    // null and undefined images should throw TypeError
    assert_throws(null, function() {ctx.drawImage(null, 0, 0)});
    assert_throws(null, function() {ctx.drawImage(null, 0, 0, 20, 20)});
    assert_throws(null, function() {ctx.drawImage(null, 0, 0, 20, 20, 0, 0, 20, 20)});
    assert_throws(null, function() {ctx.drawImage(undefined, 0, 0)});
    assert_throws(null, function() {ctx.drawImage(undefined, 0, 0, 20, 20)});
    assert_throws(null, function() {ctx.drawImage(undefined, 0, 0, 20, 20, 0, 0, 20, 20)});

    // broken images should not throw
    assert_throws(null, function() {ctx.drawImage(invalidImage, 0, 0)});
    assert_throws(null, function() {ctx.drawImage(invalidImage, 0, 0, 20, 20)});
    assert_throws(null, function() {ctx.drawImage(invalidImage, 0, 0, 20, 20, 0, 0, 20, 20)});
    assert_throws(null, function() {ctx.drawImage(invalidImage, 0, 0, 0, 20)});
    assert_throws(null, function() {ctx.drawImage(invalidImage, 0, 0, 0, 20, 0, 0, 20, 20)});
}
    
async_test(t => {
        invalidImage.onerror = function() {
            t.step(draw);
            t.done();
        }
}, "This test checks behavior of Canvas::drawImage with a broken source image.");

</script>
</body>
</html>