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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL Extension Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>
<div id="console"></div>
<script>
"use strict";

var pseudoRandom = (function() {
    var seed = 3;
    return function() {
        seed = (seed * 11 + 17) % 25;
        return seed / 25;
    };
})();

var randomizeCase = function(str) {
    var newChars = [];
    for (var ii = 0; ii < str.length; ++ii) {
        var c = str.substr(ii, 1);
        var m = (pseudoRandom() > 0.5) ? c.toLowerCase() : c.toUpperCase();
        newChars.push(m);
    }
    return newChars.join("");
};

description();

var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
var gl = wtu.create3DContext(canvas);

var ii;

debug("check every extension advertised can be enabled");
debug("");
var extensionNames = gl.getSupportedExtensions();
var extensionNamesLower = [];
for (ii = 0; ii < extensionNames.length; ++ii) {
    extensionNamesLower.push(extensionNames[ii].toLowerCase());
}

for (ii = 0; ii < extensionNames.length; ++ii) {
    var originalName = extensionNames[ii];
    var mixedName = randomizeCase(originalName);
    var extension = gl.getExtension(mixedName);
    assertMsg(extension, "able to get " + originalName + " as " + mixedName);
    if (extension) {
        var kTestString = "this is a test";
        var kTestNumber = 123;
        var kTestFunction = function() { };
        var kTestObject = { };
        extension.testStringProperty = kTestString;
        extension.testNumberProperty = kTestNumber;
        extension.testFunctionProperty = kTestFunction;
        extension.testObjectProperty = kTestObject;
        webglHarnessCollectGarbage();
        var extension2 = gl.getExtension(originalName);
        assertMsg(
            extension === extension2,
            "calling getExtension twice for the same extension returns the same object");
        assertMsg(
            extension2.testStringProperty === kTestString &&
            extension2.testFunctionProperty === kTestFunction &&
            extension2.testObjectProperty === kTestObject &&
            extension2.testNumberProperty === kTestNumber,
            "object returned by 2nd call to getExtension has same properties");

        var prefixedVariants = wtu.getExtensionPrefixedNames(originalName);
        for (var jj = 0; jj < prefixedVariants.length; ++jj) {
            assertMsg(
                gl.getExtension(prefixedVariants[jj]) === null ||
                extensionNamesLower.indexOf(prefixedVariants[jj].toLowerCase()) !== -1,
                "getExtension('" + prefixedVariants[jj] + "') returns an object only if the name is returned by getSupportedExtensions");
        }
    }
    debug("");
}

var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>

</body>
</html>
