<body>
<script>
if (window.testRunner)
    window.testRunner.dumpAsText();

var canvas = document.createElement("canvas");
canvas.width = 100;
canvas.height = 100;

// Make a pattern so large that it will fail to be allocated.
var patternCanvas = document.createElement("canvas");
patternCanvas.width = 300000;
patternCanvas.height = 300000;

var ctx = canvas.getContext("2d");
var pattern;
try {
    pattern = ctx.createPattern(patternCanvas, "repeat");
} catch (e) {
    if (e.code == DOMException.INVALID_STATE_ERR)
        document.body.appendChild(document.createTextNode("PASS: Saw exception."));
}

// The remainder of this code doesn't really matter, since pattern is null.
ctx.rect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = pattern;

ctx.fill();
</script>