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function description(msg)
{
print(msg);
print("\nOn success, you will see a series of \"PASS\" messages, followed by \"TEST COMPLETE\".\n");
print();
}
function debug(msg)
{
print(msg);
}
function escapeString(text)
{
return text.replace(/\0/g, "");
}
function testPassed(msg)
{
print("PASS", escapeString(msg));
}
function testFailed(msg)
{
print("FAIL", escapeString(msg));
}
function areArraysEqual(_a, _b)
{
if (_a.length !== _b.length)
return false;
for (var i = 0; i < _a.length; i++)
if (_a[i] !== _b[i])
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 shouldBe(_a, _b)
{
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))
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 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 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 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 + ".");
}
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