/
visualTestLoop.js
195 lines (182 loc) · 6.58 KB
/
visualTestLoop.js
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(function(exports) {
exports.getFixture = async function(name, original, callback) {
callback(await getImage(getFixtureName(name), original));
};
exports.getAsset = function(name, callback) {
var finalName = getAssetName(name);
if (fabric.getEnv().isLikelyNode) {
var plainFileName = finalName.replace('file://', '');
return fs.readFile(plainFileName, { encoding: 'utf8' }, callback);
}
else {
fabric.util.request(finalName, {
onComplete: function(xhr) {
callback(null, xhr.responseText);
}
});
}
};
function createCanvasForTest(opts) {
var fabricClass = opts.fabricClass || 'StaticCanvas';
var options = { enableRetinaScaling: false, renderOnAddRemove: false, width: 200, height: 200 };
if (opts.width) {
options.width = opts.width;
}
if (opts.height) {
options.height = opts.height;
}
return new fabric[fabricClass](null, options);
}
function localPath(path, filename) {
return 'file://' + require('path').join(__dirname, path, filename)
}
function getAssetName(filename) {
var finalName = '/assets/' + filename + '.svg';
return fabric.getEnv().isLikelyNode ? localPath('/../visual', finalName) : finalName;
}
exports.getAssetName = getAssetName;
function getGoldeName(filename) {
var finalName = '/golden/' + filename;
return fabric.getEnv().isLikelyNode ? localPath('/../visual', finalName) : finalName;
}
function getFixtureName(filename) {
var finalName = '/fixtures/' + filename;
return fabric.getEnv().isLikelyNode ? localPath('/..', finalName) : finalName;
}
function generateGolden(filename, original) {
if (fabric.getEnv().isLikelyNode && original) {
var plainFileName = filename.replace('file://', '');
var dataUrl = original.toDataURL().split(',')[1];
console.log('creating golden for ', filename);
fs.writeFileSync(plainFileName, dataUrl, { encoding: 'base64' });
}
else if (original) {
return new Promise((resolve, reject) => {
return original.toBlob(blob => {
const formData = new FormData();
formData.append('file', blob, filename);
formData.append('filename', filename);
const request = new XMLHttpRequest();
request.open('POST', '/goldens', true);
request.onreadystatechange = () => {
if (request.readyState === XMLHttpRequest.DONE) {
const status = request.status;
if (status === 0 || (status >= 200 && status < 400)) {
resolve();
} else {
reject();
}
}
};
request.send(formData);
});
}, 'image/png');
}
}
async function getImage(filename, original) {
if (fabric.getEnv().isLikelyNode && original) {
var plainFileName = filename.replace('file://', '');
if (!fs.existsSync(plainFileName)) {
generateGolden(filename, original);
}
}
else if (original) {
await fetch(`/goldens/${filename}`, { method: 'GET' })
.then(res => res.json())
.then(res => !res.exists && generateGolden(filename, original));
}
return new Promise((resolve, reject) => {
const img = fabric.getDocument().createElement('img');
img.onload = function () {
img.onerror = null;
img.onload = null;
resolve(img);
};
img.onerror = function (err) {
img.onerror = null;
img.onload = null;
reject(err);
};
img.src = filename;
});
}
exports.visualTestLoop = function(QUnit) {
var _pixelMatch;
var visualCallback;
var imageDataToChalk;
if (fabric.getEnv().isLikelyNode) {
_pixelMatch = global.pixelmatch;
visualCallback = global.visualCallback;
imageDataToChalk = global.imageDataToChalk;
}
else {
if (window) {
_pixelMatch = window.pixelmatch;
visualCallback = window.visualCallback;
}
imageDataToChalk = function() { return ''; };
}
var pixelmatchOptions = {
includeAA: false,
threshold: 0.095
};
return function testCallback(testObj) {
if (testObj.disabled) {
return;
}
fabric.StaticCanvas.prototype.requestRenderAll = fabric.StaticCanvas.prototype.renderAll;
var testName = testObj.test;
var code = testObj.code;
var percentage = testObj.percentage;
var golden = testObj.golden;
var newModule = testObj.newModule;
if (newModule) {
QUnit.module(newModule, {
beforeEach: testObj.beforeEachHandler,
});
}
QUnit.test(testName, function(assert) {
var done = assert.async();
var fabricCanvas = createCanvasForTest(testObj);
code(fabricCanvas, async function (renderedCanvas) {
var width = renderedCanvas.width;
var height = renderedCanvas.height;
var totalPixels = width * height;
var imageDataCanvas = renderedCanvas.getContext('2d').getImageData(0, 0, width, height);
var canvas = fabric.getDocument().createElement('canvas');
canvas.width = width;
canvas.height = height;
var ctx = canvas.getContext('2d');
var output = ctx.getImageData(0, 0, width, height);
const goldenImage = await getImage(getGoldeName(golden), renderedCanvas);
ctx.drawImage(goldenImage, 0, 0);
visualCallback.addArguments({
enabled: true,
golden: canvas,
fabric: imageDataCanvas,
diff: output,
goldenName: golden
});
var imageDataGolden = ctx.getImageData(0, 0, width, height).data;
var differentPixels = _pixelMatch(imageDataCanvas.data, imageDataGolden, output.data, width, height, pixelmatchOptions);
var percDiff = differentPixels / totalPixels * 100;
var okDiff = totalPixels * percentage;
var isOK = differentPixels <= okDiff;
assert.ok(
isOK,
testName + ' [' + golden + '] has too many different pixels ' + differentPixels + '(' + okDiff + ') representing ' + percDiff + '% (>' + (percentage * 100) + '%)'
);
if (!isOK) {
var stringa = imageDataToChalk(output);
console.log(stringa);
}
if (!testObj.testOnly && ((!isOK && QUnit.debugVisual) || QUnit.recreateVisualRefs)) {
await generateGolden(getGoldeName(golden), renderedCanvas);
}
await fabricCanvas.dispose();
done();
}, assert);
});
}
}
})(typeof window === 'undefined' ? exports : this);