transferFromImageBitmap-detached.html

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This WPT test may be referenced by the following Test IDs:
- /imagebitmap-renderingcontext/transferFromImageBitmap-detached.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Canvas's ImageBitmapRenderingContext test</title>

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

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

<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context">

<script>

var width = 10;

var height = 10;

promise_test(function() {

    function testException(image) {

        var dstCanvas = document.createElement('canvas');

        dstCanvas.width = width;

        dstCanvas.height = height;

        var dstCtx = dstCanvas.getContext('bitmaprenderer');

        dstCtx.transferFromImageBitmap(image);

        // The image should be detached after transferFromImageBitmap.

        assert_equals(image.width, 0);

        assert_equals(image.height, 0);

        assert_throws_dom("InvalidStateError", function() { dstCtx.transferFromImageBitmap(image); });

    var srcCanvas = document.createElement('canvas');

    srcCanvas.width = width;

    srcCanvas.height = height;

    var ctx = srcCanvas.getContext('2d');

    ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';

    ctx.fillRect(0, 0, width, height);

    return createImageBitmap(srcCanvas).then(testException);

}, "Test transferFromImageBitmap(image) with a detached image should throw InvalidStateError");

</script>