,
    {testDescription: "Test context creation attributes colorType: float16",
        canvasContextAttributes: {colorType: "float16"},
        expectedContextAttributes: {colorType: "float16"}},
];

function runTestScenario(canvas, testScenario) {
    var t = test(function() {
        var ctx = canvas.getContext('2d', testScenario.canvasContextAttributes);
        var contextAttributes = ctx.getContextAttributes();
        if (testScenario.expectedContextAttributes.alpha !== undefined) {
            assert