var consoleDiv = null;
var printFullTestDetails = true; // This is optionaly switched of by test whose tested values can differ. (see disableFullTestDetailsPrinting())

logConsole();

if (window.testRunner) {
    if (!window.runPixelTests)
        testRunner.dumpAsText();
    testRunner.waitUntilDone();
}

function runWithKeyDown(fn, key)
{
    function thunk() {
        document.removeEventListener("keypress", thunk, false);
        fn();
    }
    document.addEventListener("keypress", thunk, false);

    if (window.eventSender) {
      let character = key || " ";
      eventSender.keyDown(character, []);
    }
}

function logConsole()
{
    if (!consoleDiv && document.body) {
        consoleDiv = document.createElement('div');
        document.body.appendChild(consoleDiv);
    }
    return consoleDiv;
}

function testAndEnd(testFuncString)
{
    test(testFuncString, true);
}

function test(testFuncString, endit)
{
    logResult(eval(testFuncString), "TEST(" + testFuncString + ")");
    if (endit)
        endTest();
}

function testExpected(testFuncString, expected, comparison)
{
    try {
        var observed = eval(testFuncString);
    } catch (ex) {
        consoleWrite(ex);
        return;
    }

    if (comparison === undefined)
        comparison = '==';

    var success = false;
    switch (comparison)
    {
        case '<':  success = observed <  expected; break;
        case '<=': success = observed <= expected; break;
        case '>':  success = observed >  expected; break;
        case '>=': success = observed >= expected; break;
        case '!=': success = observed != expected; break;
        case '==': success = observed == expected; break;
    }

    reportExpected(success, testFuncString, comparison, expected, observed)
}

var testNumber = 0;

function reportExpected(success, testFuncString, comparison, expected, observed)
{
    testNumber++;

    var msg = "Test " + testNumber;

    if (printFullTestDetails || !success)
        msg = "EXPECTED (<em>" + testFuncString + " </em>" + comparison + " '<em>" + expected + "</em>')";

    if (!success)
        msg +=  ", OBSERVED '<em>" + observed + "</em>'";

    logResult(success, msg);
}

function waitForEventOnceAndEnd(element, eventName, funcString)
{
    waitForEvent(element, eventName, funcString, true, true)
}

function waitForEventOnce(element, eventName, func, endit)
{
    waitForEvent(element, eventName, func, endit, true)
}

function waitForEvent(element, eventName, func, endit, once)
{
    function _eventCallback(event)
    {
        if (once)
            element.removeEventListener(eventName, _eventCallback);

        consoleWrite("EVENT(" + eventName + ")");

        if (func)
            func(event);

        if (endit)
            endTest();
    }

    element.addEventListener(eventName, _eventCallback);
}

function waitForEventAndTest(element, eventName, testFuncString, endit)
{
    function _eventCallback(event)
    {
        logResult(eval(testFuncString), "EVENT(" + eventName + ") TEST(" + testFuncString + ")");
        if (endit)
            endTest();
    }

    element.addEventListener(eventName, _eventCallback);
}

function waitForEventTestAndEnd(element, eventName, testFuncString)
{
    waitForEventAndTest(element, eventName, testFuncString, true);
}

var testEnded = false;

function endTest()
{
    if (testEnded)
        return;
    consoleWrite("END OF TEST");
    testEnded = true;
    if (window.testRunner)
        testRunner.notifyDone();
}

function logResult(success, text)
{
    if (success)
        consoleWrite(text + " <span style='color:green'>OK</span>");
    else
        consoleWrite(text + " <span style='color:red'>FAIL</span>");
}

function consoleWrite(text)
{
    if (testEnded)
        return;
    logConsole().innerHTML += text + "<br>";
}