webgl-context-attributes-default-value.html

<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test.js"></script>
<script src="resources/webgl-test.js"></script>
<script>

  var defaultAttributes = {
    alpha : true,
    depth : true,
    stencil : false,
    // FIXME: context.getContextAttributes().antialias is always false on
    // content shell with --run-web-tests option. See http://crbug.com/375682
    // antialias : true,
    premultipliedAlpha : true,
    preserveDrawingBuffer : false,
    failIfMajorPerformanceCaveat : false,
    desynchronized : false,
  };

  var falseAttributes = {
    alpha : false,
    depth : false,
    stencil : false,
    // FIXME: context.getContextAttributes().antialias is always false on
    // content shell with --run-web-tests option. See http://crbug.com/375682
    // antialias : true,
    premultipliedAlpha : false,
    preserveDrawingBuffer : false,
    failIfMajorPerformanceCaveat : false,
  };

  function testAttributes(expectedAttributes, checkValue) {

    if (arguments.length != 1 && arguments.length != 2)
      return;

    var canvas = document.createElement("canvas");
    var initialAttributes = {};
    var isUndefinedOrNull = arguments.length == 2 &&
        (checkValue == undefined || checkValue == null);

    if (isUndefinedOrNull)
      for (key in expectedAttributes)
        initialAttributes[key] = checkValue;

    var context = create3DContext(canvas, initialAttributes);

    window.actualContextAttributes = context.getContextAttributes();

    for (key in expectedAttributes)
      shouldBe("actualContextAttributes." + key,
          expectedAttributes[key].toString());
  }

</script>
</head>
<body>
<script>

  debug("Testing default value:");
  testAttributes(defaultAttributes);
  debug("")

  debug("Testing undefined value:");
  testAttributes(defaultAttributes, undefined);
  debug("")

  debug("Testing null value:");
  testAttributes(falseAttributes, null);
  debug("")

</script>
</body>
chromium/third_party/blink/web_tests/fast/webgl/webgl-context-attributes-default-value.html
