<!DOCTYPE html>
<html>
<head>
<script src="../../http/tests/inspector/resources/inspector-test.js"></script>
<script>
function load() {
    window.contextWebGL = document.createElement("canvas").getContext("webgl");
    window.contextWebGL.clearColor(0, 1, 0, 0.5); // Half-transparent green
    window.contextWebGL.clear(window.contextWebGL.COLOR_BUFFER_BIT);

    runTest();
}

function test() {
    let suite = InspectorTest.createAsyncSuite("Canvas.requestContentWebGL");

    suite.addTestCase({
        name: "Canvas.requestContentWebGL.validCanvasId",
        description: "Get the base64 encoded data for the WebGL canvas on the page.",
        test(resolve, reject) {
            let canvas = WI.canvasManager.canvases.find((canvas) => canvas.contextType === WI.Canvas.ContextType.WebGL);
            if (!canvas) {
                reject(`Missing Canvas.`);
                return;
            }

            CanvasAgent.requestContent(canvas.identifier)
            .then(({content}) => InspectorTest.expectGreaterThan(content.length, "data:image/png;base64,".length, "Content should not be empty."))
            .then(resolve, reject);
        }
    });

    suite.runTestCasesAndFinish();
}
</script>
</head>
<body onload="load()">
    <p>Test that CanvasAgent.requestContent can retrieve a dataURL with the current content of the WebGL canvas.</p>
</body>
</html>