getContextAttributes.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/manual/context-attributes/getContextAttributes.html - WPT Dashboard Interop Dashboard

<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, desynchronized: false, willReadFrequently: false}},

    {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}},

    {testDescription: "Test context creation attributes desynchronized: false",

        canvasContextAttributes: {desynchronized: false},

        expectedContextAttributes: {desynchronized: false}},

    {testDescription: "Test context creation attributes willReadFrequently: true",

        canvasContextAttributes: {willReadFrequently: true},

        expectedContextAttributes: {willReadFrequently: true}},

];

function runTestScenario(testScenario) {

    var t = test(function() {

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

        var ctx = canvas.getContext('2d', testScenario.canvasContextAttributes);

        var contextAttributes = ctx.getContextAttributes();

        if (testScenario.expectedContextAttributes.alpha !== undefined) {

            assert_equals(contextAttributes.alpha,

                testScenario.expectedContextAttributes.alpha);

        if (testScenario.expectedContextAttributes.desynchronized !== undefined) {

            assert_equals(contextAttributes.desynchronized,

                testScenario.expectedContextAttributes.desynchronized);

    }, testScenario.testDescription);

function runAllTests() {

    for (var i = 0; i < testScenarios.length; i++)

        runTestScenario(testScenarios[i]);

runAllTests();

</script>