2dcontext/context-attributes/getContextAttributes.html

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

<script>

var testScenarios = [
    {testDescription: "Test default context creation attributes",
        canvasContextAttributes: {},
        expectedContextAttributes: {alpha : true}},
    {testDescription: "Test context creation attributes alpha: true",
        canvasContextAttributes: {alpha: true},
        expectedContextAttributes: {alpha : true}},
    {testDescription: "Test context creation attributes alpha: false",
        canvasContextAttributes: {alpha: false},
        expectedContextAttributes: {alpha : false}},
];

function runTestScenario(testScenario) {
    var t = test(function() {
        var canvas = document. createElement('canvas');
        var ctx = canvas.getContext('2d', testScenario.canvasContextAttributes);
        var contextAttributes = ctx.getContextAttributes();
        assert_equals(contextAttributes.alpha,
            testScenario.expectedContextAttributes.alpha);
    }, testScenario.testDescription);
}

function runAllTests() {
    for (var i = 0; i < testScenarios.length; i++)
        runTestScenario(testScenarios[i]);
}

runAllTests();
</script>