function _valToString(val)
{
if (val === undefined || val === null)
return '[' + typeof(val) + ']';
return val.toString() + '[' + typeof(val) + ']';
}
var _failed = false;
var _asserted = false;
add_result_callback(function(test) {
if (test.status !== test.PASS) {
_fail(test.message);
}
});
function _warn(text)
{
document.getElementById('d').appendChild(document.createElement('li')).appendChild(document.createTextNode(text));
}
function _fail(text)
{
_warn(text);
_failed = true;
}
function _assert(cond, text)
{
_asserted = true;
if (! cond)
_fail('Failed assertion: ' + text);
assert_true(!!cond, text);
}
function _assertSame(a, b, text_a, text_b)
{
_asserted = true;
var msg = text_a + ' === ' + text_b + ' (got ' + _valToString(a) +
', expected ' + _valToString(b) + ')';
if (a !== b)
_fail('Failed assertion ' + msg);
assert_equals(a, b, msg);
}
function _assertDifferent(a, b, text_a, text_b)
{
_asserted = true;
var msg = text_a + ' !== ' + text_b + ' (got ' + _valToString(a) +
', expected not ' + _valToString(b) + ')';
if (a === b)
_fail('Failed assertion ' + msg);
assert_not_equals(a, b, msg);
}
function _assertEqual(a, b, text_a, text_b)
{
_asserted = true;
var msg = text_a + ' == ' + text_b + ' (got ' + _valToString(a) +
', expected ' + _valToString(b) + ')';
if (a != b)
_fail('Failed assertion ' + msg);
assert_true(a == b, msg);
}
function _assertMatch(a, b, text_a, text_b)
{
_asserted = true;
var msg = text_a + ' matches ' + text_b + ' (got ' + _valToString(a) + ')';
var failed = !a.match(b);
if (failed)
_fail('Failed assertion ' + msg);
assert_true(!failed, msg);
}
var _manual_check = false;
function _requireManualCheck()
{
_manual_check = true;
}
function _crash()
{
_fail('Aborted due to predicted crash');
}
function _getPixel(canvas, x,y)
{
try
{
var ctx = canvas.getContext('2d');
var imgdata = ctx.getImageData(x, y, 1, 1);
return [ imgdata.data[0], imgdata.data[1], imgdata.data[2], imgdata.data[3] ];
}
catch (e)
{
// probably a security exception caused by having drawn
// data: URLs onto the canvas
_manual_check = true;
return undefined;
}
}
function _assertPixel(canvas, x,y, r,g,b,a, pos, colour)
{
_asserted = true;
var c = _getPixel(canvas, x,y);
var msg = 'got pixel [' + c + '] at ('+x+','+y+'), ' +
'expected ['+r+','+g+','+b+','+a+']';
if (c && ! (c[0] == r && c[1] == g && c[2] == b && c[3] == a))
_fail('Failed assertion: ' + msg);
assert_true(!c || (c[0] == r && c[1] == g && c[2] == b && c[3] == a), msg);
}
function _assertPixelApprox(canvas, x,y, r,g,b,a, pos, colour, tolerance)
{
_asserted = true;
var c = _getPixel(canvas, x,y);
var msg = 'got pixel [' + c + '] at ('+x+','+y+'), ' +
'expected ['+r+','+g+','+b+','+a+'] +/- ' + tolerance;
if (c)
{
var diff = Math.max(Math.abs(c[0]-r), Math.abs(c[1]-g), Math.abs(c[2]-b), Math.abs(c[3]-a));
if (diff > tolerance)
_fail('Failed assertion: ' + msg);
}
assert_true(!c || Math.max(Math.abs(c[0]-r), Math.abs(c[1]-g), Math.abs(c[2]-b), Math.abs(c[3]-a)) <= tolerance,
msg);
}
function _addTest(testFn)
{
var deferred = false;
window.deferTest = function () { deferred = true; };
function endTest()
{
if (_failed) // test failed
{
t.done();
document.documentElement.className += ' fail';
window._testStatus = ['fail', document.getElementById('d').innerHTML];
}
else if (_manual_check || !_asserted)
{ // test case explicitly asked for a manual check, or no automatic assertions were performed
document.getElementById('d').innerHTML += '<li>Cannot automatically verify result';
document.documentElement.className += ' needs_check';
window._testStatus = ['check', document.getElementById('d').innerHTML];
}
else // test succeeded
{
t.done();
document.getElementById('d').innerHTML += '<li>Passed';
document.documentElement.className += ' pass';
window._testStatus = ['pass', document.getElementById('d').innerHTML];
}
};
window.endTest = endTest;
window.wrapFunction = function (f)
{
return function()
{
try
{
f.apply(null, arguments);
}
catch (e)
{
_fail('Aborted with exception: ' + e.message);
}
endTest();
};
};
on_event(window, "load", function()
{
try
{
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
t.step(testFn, window, canvas, ctx);
}
catch (e)
{
_fail('Aborted with exception: ' + e.message);
deferred = false; // cancel any deference
}
if (! deferred)
endTest();
});
}
function _assertGreen(ctx, canvasWidth, canvasHeight)
{
var testColor = function(d, idx, expected) {
_assertEqual(d[idx], expected, "d[" + idx + "]", String(expected));
};
var imagedata = ctx.getImageData(0, 0, canvasWidth, canvasHeight);
var w = imagedata.width, h = imagedata.height, d = imagedata.data;
for (var i = 0; i < h; ++i) {
for (var j = 0; j < w; ++j) {
testColor(d, 4 * (w * i + j) + 0, 0);
testColor(d, 4 * (w * i + j) + 1, 255);
testColor(d, 4 * (w * i + j) + 2, 0);
testColor(d, 4 * (w * i + j) + 3, 255);
}
}
}
function _assert_throws(code, func, desc)
{
_asserted = true;
assert_throws(code, func, desc);
}