/*
** Copyright (c) 2012 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/

(function() {
  var testHarnessInitialized = false;

  var initNonKhronosFramework = function(waitUntilDone) {
    if (testHarnessInitialized) {
      return;
    }
    testHarnessInitialized = true;

    /* -- plaform specific code -- */

    // WebKit Specific code. Add your code here.
    if (window.testRunner && !window.layoutTestController) {
      window.layoutTestController = window.testRunner;
    }

    if (window.layoutTestController) {
      layoutTestController.overridePreference("WebKitWebGLEnabled", "1");
      layoutTestController.dumpAsText();
      layoutTestController.waitUntilDone();
    }
    if (window.internals) {
      // The WebKit testing system compares console output.
      // Because the output of the WebGL Tests is GPU dependent
      // we turn off console messages.
      window.console.log = function() { };
      window.console.error = function() { };
      window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
    }

    /* -- end platform specific code --*/
  }

  this.initTestingHarnessWaitUntilDone = function() {
    initNonKhronosFramework(true);
  }

  this.initTestingHarness = function() {
    initNonKhronosFramework(false);
  }
}());

function nonKhronosFrameworkNotifyDone() {
  // WebKit Specific code. Add your code here.
  if (window.layoutTestController) {
    layoutTestController.notifyDone();
  }
}

function reportTestResultsToHarness(success, msg) {
  if (window.parent.webglTestHarness) {
    window.parent.webglTestHarness.reportResults(window.location.pathname, success, msg);
  }
}

function notifyFinishedToHarness() {
  if (window.parent.webglTestHarness) {
    window.parent.webglTestHarness.notifyFinished(window.location.pathname);
  }
  if (window.nonKhronosFrameworkNotifyDone) {
    window.nonKhronosFrameworkNotifyDone();
  }
}

function description(msg)
{
    initTestingHarness();
    if (msg === undefined) {
      msg = document.title;
    }
    // For MSIE 6 compatibility
    var span = document.createElement("span");
    span.innerHTML = '<p>' + msg + '</p><p>On success, you will see a series of "<span class="pass">PASS</span>" messages, followed by "<span class="pass">TEST COMPLETE</span>".</p>';
    var description = document.getElementById("description");
    if (description.firstChild)
        description.replaceChild(span, description.firstChild);
    else
        description.appendChild(span);
}

function debug(msg)
{
    var span = document.createElement("span");
    document.getElementById("console").appendChild(span); // insert it first so XHTML knows the namespace
    span.innerHTML = msg + '<br />';
}

function escapeHTML(text)
{
    return text.replace(/&/g, "&amp;").replace(/</g, "&lt;");
}

function testPassed(msg)
{
    reportTestResultsToHarness(true, msg);
    debug('<span><span class="pass">PASS</span> ' + escapeHTML(msg) + '</span>');
}

function testFailed(msg)
{
    reportTestResultsToHarness(false, msg);
    debug('<span><span class="fail">FAIL</span> ' + escapeHTML(msg) + '</span>');
}

function areArraysEqual(_a, _b)
{
    try {
        if (_a.length !== _b.length)
            return false;
        for (var i = 0; i < _a.length; i++)
            if (_a[i] !== _b[i])
                return false;
    } catch (ex) {
        return false;
    }
    return true;
}

function isMinusZero(n)
{
    // the only way to tell 0 from -0 in JS is the fact that 1/-0 is
    // -Infinity instead of Infinity
    return n === 0 && 1/n < 0;
}

function isResultCorrect(_actual, _expected)
{
    if (_expected === 0)
        return _actual === _expected && (1/_actual) === (1/_expected);
    if (_actual === _expected)
        return true;
    if (typeof(_expected) == "number" && isNaN(_expected))
        return typeof(_actual) == "number" && isNaN(_actual);
    if (Object.prototype.toString.call(_expected) == Object.prototype.toString.call([]))
        return areArraysEqual(_actual, _expected);
    return false;
}

function stringify(v)
{
    if (v === 0 && 1/v < 0)
        return "-0";
    else return "" + v;
}

function evalAndLog(_a)
{
  if (typeof _a != "string")
    debug("WARN: tryAndLog() expects a string argument");

  // Log first in case things go horribly wrong or this causes a sync event.
  debug(_a);

  var _av;
  try {
     _av = eval(_a);
  } catch (e) {
    testFailed(_a + " threw exception " + e);
  }
  return _av;
}

function shouldBe(_a, _b, quiet)
{
    if (typeof _a != "string" || typeof _b != "string")
        debug("WARN: shouldBe() expects string arguments");
    var exception;
    var _av;
    try {
        _av = eval(_a);
    } catch (e) {
        exception = e;
    }
    var _bv = eval(_b);

    if (exception)
        testFailed(_a + " should be " + _bv + ". Threw exception " + exception);
    else if (isResultCorrect(_av, _bv)) {
        if (!quiet) {
            testPassed(_a + " is " + _b);
        }
    } else if (typeof(_av) == typeof(_bv))
        testFailed(_a + " should be " + _bv + ". Was " + stringify(_av) + ".");
    else
        testFailed(_a + " should be " + _bv + " (of type " + typeof _bv + "). Was " + _av + " (of type " + typeof _av + ").");
}

function shouldNotBe(_a, _b, quiet)
{
    if (typeof _a != "string" || typeof _b != "string")
        debug("WARN: shouldNotBe() expects string arguments");
    var exception;
    var _av;
    try {
        _av = eval(_a);
    } catch (e) {
        exception = e;
    }
    var _bv = eval(_b);

    if (exception)
        testFailed(_a + " should not be " + _bv + ". Threw exception " + exception);
    else if (!isResultCorrect(_av, _bv)) {
        if (!quiet) {
            testPassed(_a + " is not " + _b);
        }
    } else
        testFailed(_a + " should not be " + _bv + ".");
}

function shouldBeTrue(_a) { shouldBe(_a, "true"); }
function shouldBeFalse(_a) { shouldBe(_a, "false"); }
function shouldBeNaN(_a) { shouldBe(_a, "NaN"); }
function shouldBeNull(_a) { shouldBe(_a, "null"); }

function shouldBeEqualToString(a, b)
{
  var unevaledString = '"' + b.replace(/"/g, "\"") + '"';
  shouldBe(a, unevaledString);
}

function shouldEvaluateTo(actual, expected) {
  // A general-purpose comparator.  'actual' should be a string to be
  // evaluated, as for shouldBe(). 'expected' may be any type and will be
  // used without being eval'ed.
  if (expected == null) {
    // Do this before the object test, since null is of type 'object'.
    shouldBeNull(actual);
  } else if (typeof expected == "undefined") {
    shouldBeUndefined(actual);
  } else if (typeof expected == "function") {
    // All this fuss is to avoid the string-arg warning from shouldBe().
    try {
      actualValue = eval(actual);
    } catch (e) {
      testFailed("Evaluating " + actual + ": Threw exception " + e);
      return;
    }
    shouldBe("'" + actualValue.toString().replace(/\n/g, "") + "'",
             "'" + expected.toString().replace(/\n/g, "") + "'");
  } else if (typeof expected == "object") {
    shouldBeTrue(actual + " == '" + expected + "'");
  } else if (typeof expected == "string") {
    shouldBe(actual, expected);
  } else if (typeof expected == "boolean") {
    shouldBe("typeof " + actual, "'boolean'");
    if (expected)
      shouldBeTrue(actual);
    else
      shouldBeFalse(actual);
  } else if (typeof expected == "number") {
    shouldBe(actual, stringify(expected));
  } else {
    debug(expected + " is unknown type " + typeof expected);
    shouldBeTrue(actual, "'"  +expected.toString() + "'");
  }
}

function shouldBeNonZero(_a)
{
  var exception;
  var _av;
  try {
     _av = eval(_a);
  } catch (e) {
     exception = e;
  }

  if (exception)
    testFailed(_a + " should be non-zero. Threw exception " + exception);
  else if (_av != 0)
    testPassed(_a + " is non-zero.");
  else
    testFailed(_a + " should be non-zero. Was " + _av);
}

function shouldBeNonNull(_a)
{
  var exception;
  var _av;
  try {
     _av = eval(_a);
  } catch (e) {
     exception = e;
  }

  if (exception)
    testFailed(_a + " should be non-null. Threw exception " + exception);
  else if (_av != null)
    testPassed(_a + " is non-null.");
  else
    testFailed(_a + " should be non-null. Was " + _av);
}

function shouldBeUndefined(_a)
{
  var exception;
  var _av;
  try {
     _av = eval(_a);
  } catch (e) {
     exception = e;
  }

  if (exception)
    testFailed(_a + " should be undefined. Threw exception " + exception);
  else if (typeof _av == "undefined")
    testPassed(_a + " is undefined.");
  else
    testFailed(_a + " should be undefined. Was " + _av);
}

function shouldBeDefined(_a)
{
  var exception;
  var _av;
  try {
     _av = eval(_a);
  } catch (e) {
     exception = e;
  }

  if (exception)
    testFailed(_a + " should be defined. Threw exception " + exception);
  else if (_av !== undefined)
    testPassed(_a + " is defined.");
  else
    testFailed(_a + " should be defined. Was " + _av);
}

function shouldBeGreaterThanOrEqual(_a, _b) {
    if (typeof _a != "string" || typeof _b != "string")
        debug("WARN: shouldBeGreaterThanOrEqual expects string arguments");

    var exception;
    var _av;
    try {
        _av = eval(_a);
    } catch (e) {
        exception = e;
    }
    var _bv = eval(_b);

    if (exception)
        testFailed(_a + " should be >= " + _b + ". Threw exception " + exception);
    else if (typeof _av == "undefined" || _av < _bv)
        testFailed(_a + " should be >= " + _b + ". Was " + _av + " (of type " + typeof _av + ").");
    else
        testPassed(_a + " is >= " + _b);
}

function expectTrue(v, msg) {
  if (v) {
    testPassed(msg);
  } else {
    testFailed(msg);
  }
}

function shouldThrow(_a, _e)
{
  var exception;
  var _av;
  try {
     _av = eval(_a);
  } catch (e) {
     exception = e;
  }

  var _ev;
  if (_e)
      _ev =  eval(_e);

  if (exception) {
    if (typeof _e == "undefined" || exception == _ev)
      testPassed(_a + " threw exception " + exception + ".");
    else
      testFailed(_a + " should throw " + (typeof _e == "undefined" ? "an exception" : _ev) + ". Threw exception " + exception + ".");
  } else if (typeof _av == "undefined")
    testFailed(_a + " should throw " + (typeof _e == "undefined" ? "an exception" : _ev) + ". Was undefined.");
  else
    testFailed(_a + " should throw " + (typeof _e == "undefined" ? "an exception" : _ev) + ". Was " + _av + ".");
}

function shouldBeType(_a, _type) {
	var exception;
	var _av;
	try {
		_av = eval(_a);
	} catch (e) {
		exception = e;
	}

	var _typev = eval(_type);

	if (_av instanceof _typev) {
		testPassed(_a + " is an instance of " + _type);
	} else {
		testFailed(_a + " is not an instance of " + _type);
	}
}

function assertMsg(assertion, msg) {
    if (assertion) {
        testPassed(msg);
    } else {
        testFailed(msg);
    }
}

function gc() {
    if (window.GCController) {
        window.GCController.collect();
        return;
    }

    if (window.opera && window.opera.collect) {
        window.opera.collect();
        return;
    }

    try {
        window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
              .getInterface(Components.interfaces.nsIDOMWindowUtils)
              .garbageCollect();
        return;
    } catch(e) {}

    function gcRec(n) {
        if (n < 1)
            return {};
        var temp = {i: "ab" + i + (i / 100000)};
        temp += "foo";
        gcRec(n-1);
    }
    for (var i = 0; i < 1000; i++)
        gcRec(10);
}

function finishTest() {
  successfullyParsed = true;
  var epilogue = document.createElement("script");

  var basePath = "";
  var expectedBase = "js-test-pre.js";
  var scripts = document.getElementsByTagName('script');
  for (var script, i = 0; script = scripts[i]; i++) {
    var src = script.src;
    var l = src.length;
    if (src.substr(l - expectedBase.length) == expectedBase) {
      basePath = src.substr(0, l - expectedBase.length);
      break;
    }
  }
  epilogue.src = basePath + "js-test-post.js";
  document.body.appendChild(epilogue);
}

