sky/tests/resources/js-test.html

<script>
var isJsTest = true;

var description, debug, successfullyParsed;

var expectingError; // set by shouldHaveError()
var expectedErrorMessage; // set by onerror when expectingError is true
var unexpectedErrorMessage; // set by onerror when expectingError is not true

(function() {
    function body() {
        var documentElement = document.documentElement;
        for (var child = documentElement.firstChild; child; child = child.nextSibling) {
            if (child.tagName == 'BODY')
              return child;
        }
        return documentElement;
    }

    function getOrCreate(id, tagName) {
        var element = document.getElementById(id);
        if (element)
            return element;

        element = document.createElement(tagName);
        element.id = id;
        var refNode;
        var parent = body();
        if (id == "description")
            refNode = getOrCreate("console", "div");
        else
            refNode = parent.firstChild;

        parent.insertBefore(element, refNode);
        return element;
    }

    description = function description(msg) {
        var description = getOrCreate("description", "div");
        description.textContent = msg;
    };

    debug = function debug(msg) {
        var div = document.createElement("div");
        getOrCreate("console", "div").appendChild(div);
        div.textContent = msg;
    };

    if (!self.isOnErrorTest) {
        self.onerror = function(message) {
            if (self.expectingError) {
                self.expectedErrorMessage = message;
                self.expectingError = false;
                return;
            }
            self.unexpectedErrorMessage = message;
            if (self.jsTestIsAsync) {
                self.testFailed("Unexpected error: " + message);
                finishJSTest();
            }
        };
    }
})();

function testPassed(msg)
{
    debug('PASS: ' + msg);
}

function testFailed(msg)
{
    debug('FAIL: ' + msg);
}

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 (expected && (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, _quiet)
{
  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.
  if (!_quiet)
    debug(_a);

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

function shouldBe(_a, _b, quiet, opt_tolerance)
{
  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) || (typeof opt_tolerance == 'number' && typeof _av == 'number' && Math.abs(_av - _bv) <= opt_tolerance)) {
    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 + ").");
}

// Execute condition every 5 milliseconds until it succeed or failureTime is reached.
// completionHandler is executed on success, failureHandler is executed on timeout.
function _waitForCondition(condition, failureTime, completionHandler, failureHandler)
{
  if (condition()) {
    completionHandler();
  } else if (Date.now() > failureTime) {
    failureHandler();
  } else {
    setTimeout(_waitForCondition, 5, condition, failureTime, completionHandler, failureHandler);
  }
}

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

  if (_timeout === undefined)
    _timeout = 500;

  var _bv;
  var _condition = function() {
    var _exception;
    var _av;
    try {
      _av = eval(_a);
    } catch (e) {
        _exception = e;
    }
    _bv = eval(_b);
    if (_exception)
      testFailed(_a + " should become " + _bv + ". Threw exception " + _exception);
    if (isResultCorrect(_av, _bv)) {
      testPassed(_a + " became " + _b);
      return true;
    }
    return false;
  };
  var _failureTime = Date.now() + _timeout;
  var _failureHandler = function () {
    testFailed(_a + " failed to change to " + _bv + " in " + (_timeout / 1000) + " seconds.");
    _completionHandler();
  };
  _waitForCondition(_condition, _failureTime, _completionHandler, _failureHandler);
}

function shouldBecomeEqualToString(value, reference, completionHandler, timeout)
{
  if (typeof value !== "string" || typeof reference !== "string")
    debug("WARN: shouldBecomeEqualToString() expects string arguments");
  var unevaledString = JSON.stringify(reference);
  shouldBecomeEqual(value, unevaledString, completionHandler, timeout);
}

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);
  }
}

// Variant of shouldBe()--confirms that result of eval(_to_eval) is within
// numeric _tolerance of numeric _target.
function shouldBeCloseTo(_to_eval, _target, _tolerance, _quiet)
{
  if (typeof _to_eval != "string") {
    testFailed("shouldBeCloseTo() requires string argument _to_eval. was type " + typeof _to_eval);
    return;
  }
  if (typeof _target != "number") {
    testFailed("shouldBeCloseTo() requires numeric argument _target. was type " + typeof _target);
    return;
  }
  if (typeof _tolerance != "number") {
    testFailed("shouldBeCloseTo() requires numeric argument _tolerance. was type " + typeof _tolerance);
    return;
  }

  var _result;
  try {
     _result = eval(_to_eval);
  } catch (e) {
    testFailed(_to_eval + " should be within " + _tolerance + " of "
               + _target + ". Threw exception " + e);
    return;
  }

  if (typeof(_result) != typeof(_target)) {
    testFailed(_to_eval + " should be of type " + typeof _target
               + " but was of type " + typeof _result);
  } else if (Math.abs(_result - _target) <= _tolerance) {
    if (!_quiet) {
        testPassed(_to_eval + " is within " + _tolerance + " of " + _target);
    }
  } else {
    testFailed(_to_eval + " should be within " + _tolerance + " of " + _target
               + ". Was " + _result + ".");
  }
}

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 shouldBecomeDifferent(_a, _b, _completionHandler, _timeout)
{
  if (typeof _a != "string" || typeof _b != "string")
    debug("WARN: shouldBecomeDifferent() expects string arguments");
  if (_timeout === undefined)
    _timeout = 500;

  var _bv;
  var _condition = function() {
    var _exception;
    var _av;
    try {
      _av = eval(_a);
    } catch (e) {
      _exception = e;
    }
    _bv = eval(_b);
    if (_exception)
      testFailed(_a + " should became not equal to " + _bv + ". Threw exception " + _exception);
    if (!isResultCorrect(_av, _bv)) {
      testPassed(_a + " became different from " + _b);
      return true;
    }
    return false;
  };
  var _failureTime = Date.now() + _timeout;
  var _failureHandler = function () {
    testFailed(_a + " did not become different from " + _bv + " in " + (_timeout / 1000) + " seconds.");
    _completionHandler();
  };
  _waitForCondition(_condition, _failureTime, _completionHandler, _failureHandler);
}

function shouldBeTrue(a, quiet) { shouldBe(a, "true", quiet); }
function shouldBeTrueQuiet(a) { shouldBe(a, "true", true); }
function shouldBeFalse(a, quiet) { shouldBe(a, "false", quiet); }
function shouldBeNaN(a, quiet) { shouldBe(a, "NaN", quiet); }
function shouldBeNull(a, quiet) { shouldBe(a, "null", quiet); }
function shouldBeZero(a, quiet) { shouldBe(a, "0", quiet); }

function shouldBeEqualToString(a, b)
{
  if (typeof a !== "string" || typeof b !== "string")
    debug("WARN: shouldBeEqualToString() expects string arguments");
  var unevaledString = JSON.stringify(b);
  shouldBe(a, unevaledString);
}

function shouldBeEqualToNumber(a, b)
{
  if (typeof a !== "string" || typeof b !== "number")
    debug("WARN: shouldBeEqualToNumber() expects a string and a number arguments");
  var unevaledString = JSON.stringify(b);
  shouldBe(a, unevaledString);
}

function shouldBeEmptyString(a) { shouldBeEqualToString(a, ""); }

function shouldEvaluateTo(actual, expected, opt_tolerance) {
  // 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 {
      var 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, undefined, opt_tolerance);
  } else if (typeof expected == "boolean") {
    shouldBe("typeof " + actual, "'boolean'");
    if (expected)
      shouldBeTrue(actual);
    else
      shouldBeFalse(actual);
  } else if (typeof expected == "number") {
    if (opt_tolerance)
        shouldBeCloseTo(actual, expected, opt_tolerance);
    else
        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 shouldBeGreaterThan(_a, _b) {
    if (typeof _a != "string" || typeof _b != "string")
        debug("WARN: shouldBeGreaterThan 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 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 shouldNotThrow(_a) {
    try {
        eval(_a);
        testPassed(_a + " did not throw exception.");
    } catch (e) {
        testFailed(_a + " should not throw exception. Threw exception " + e + ".");
    }
}

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 expectError()
{
    if (expectingError) {
        testFailed("shouldHaveError() called twice before an error occurred!");
    }
    expectingError = true;
}

function shouldHaveHadError(message)
{
    if (expectingError) {
        testFailed("No error thrown between expectError() and shouldHaveHadError()");
        return;
    }

    if (expectedErrorMessage) {
        if (!message)
            testPassed("Got expected error");
        else if (expectedErrorMessage.indexOf(message) !== -1)
            testPassed("Got expected error: '" + message + "'");
        else
            testFailed("Unexpected error '" + message + "'");
        expectedErrorMessage = undefined;
        return;
    }

    testFailed("expectError() not called before shouldHaveHadError()");
}

function isSuccessfullyParsed()
{
    // FIXME: Remove this and only report unexpected syntax errors.
    successfullyParsed = !unexpectedErrorMessage;
    shouldBeTrue("successfullyParsed");
    debug('TEST COMPLETE');
}

var wasFinishJSTestCalled, jsTestIsAsync;

function finishJSTest()
{
    wasFinishJSTestCalled = true;
    isSuccessfullyParsed();
    if (self.internals)
        internals.notifyTestComplete(internals.contentAsText());
}

window.addEventListener('load', function() {
    if (!self.jsTestIsAsync)
        finishJSTest();
});
</script>