Viewing File: /home/cienp/public_html/portal/vendors/echarts/test/ut/core/uiHelper.js
(function (context) {
var helper = context.uiHelper = {};
// canvas comparing strategy, 'stack' or 'content'
var STRATEGY = 'stack';
// always display images even if no error
var ALWAYS_SHOW_IMAGE = true;
// dom for failed cases
var failedDom = document.createElement('div');
failedDom.setAttribute('id', 'failed-panel');
var hasFailedDom = false;
/**
* expect canvas.toDataURL to be the same by old and new echarts
* @param {string} title title of suite and case
* @param {function} doTest test body
* @param {function} done done callback provided by jasmine
*/
helper.expectEqualCanvasContent = function(title, doTest, done) {
var that = this;
window.require(['oldEcharts', 'newEcharts'], function (oldE, newE) {
var oldImg = doTest(oldE).toDataURL();
var newImg = doTest(newE).toDataURL();
if (ALWAYS_SHOW_IMAGE || oldImg !== newImg) {
that.addFailedCases(title, oldImg, newImg);
}
expect(oldImg).toEqual(newImg);
done();
});
};
/**
* expect canvas operation stack provided by canteen
* to be the same by old and new echarts
* @param {string} title title of suite and case
* @param {function} doTest test body
* @param {function} done done callback provided by jasmine
*/
helper.expectEqualCanvasStack = function(title, doTest, done) {
window.require(['oldEcharts', 'newEcharts'], function (oldE, newE) {
var oldCanvas = doTest(oldE);
var newCanvas = doTest(newE);
var oldImg = oldCanvas.toDataURL();
var newImg = newCanvas.toDataURL();
if (ALWAYS_SHOW_IMAGE || oldImg !== newImg) {
helper.addFailedCases(title, oldImg, newImg);
}
var oldCtx = oldCanvas.getContext('2d');
var newCtx = newCanvas.getContext('2d');
// hash of canvas operation stack, provided by canteen
// https://github.com/platfora/Canteen
// console.log(oldCtx.hash());
expect(oldCtx.hash()).toEqual(newCtx.hash());
done();
});
};
/**
* expect canvas with strategy
* @param {string} title title of suite and case
* @param {function} doTest test body
* @param {function} done done callback provided by jasmine
*/
helper.expectEqualCanvas = function(title, doTest, done) {
if (STRATEGY === 'content') {
helper.expectEqualCanvasContent(title, doTest, done);
} else if (STRATEGY === 'stack') {
helper.expectEqualCanvasStack(title, doTest, done);
} else {
console.error('Invalid equal canvas strategy!');
}
};
var optionCompareHelper = function(isExpectEqual,
title,
option1,
option2) {
it(title, function(done) {
window.require(['newEcharts'], function (ec) {
var canvas1 = helper.getRenderedCanvas(ec, function(myChart) {
myChart.setOption(helper.preprocessOption(option1));
});
var canvas2 = helper.getRenderedCanvas(ec, function(myChart) {
myChart.setOption(helper.preprocessOption(option2));
});
var ctx1 = canvas1.getContext('2d');
var ctx2 = canvas2.getContext('2d');
var img1 = canvas1.toDataURL();
var img2 = canvas2.toDataURL();
var compare1 = compare2 = null;
if (STRATEGY === 'content') {
compare1 = img1;
compare2 = img2;
} else if (STRATEGY === 'stack') {
compare1 = ctx1.hash()
compare2 = ctx2.hash();
} else {
console.error('Invalid equal canvas strategy!');
}
if (isExpectEqual) {
expect(compare1).toEqual(compare2);
} else {
expect(compare1).not.toEqual(compare2);
}
if (ALWAYS_SHOW_IMAGE || (compare1 === compare2) ^ isExpectEqual) {
helper.addFailedCases(title, img1, img2);
// console.log(title);
// console.log(JSON.stringify(ctx1.stack()));
// console.log(JSON.stringify(ctx2.stack()));
}
done();
});
});
};
/**
* expect two options have the same canvas for new echarts
* @param {string} title title of test case
* @param {object} option1 one echarts option
* @param {object} option2 the other echarts option
* @param {function} done callback for jasmine
*/
helper.expectEqualOption = function(title, option1, option2) {
optionCompareHelper(true, title, option1, option2);
};
/**
* expect two options have different canvas for new echarts
* @param {string} title title of test case
* @param {object} option1 one echarts option
* @param {object} option2 the other echarts option
* @param {function} done callback for jasmine
*/
helper.expectNotEqualOption = function(title, option1, option2) {
optionCompareHelper(false, title, option1, option2);
};
/**
* get rendered canvas with echarts and operations
* @param {object} echarts echarts
* @param {function} operations operations with echarts
* @return {Canvas} canvas rendered by echarts
*/
helper.getRenderedCanvas = function(echarts, operations) {
// init canvas with echarts
var canvas = document.createElement('canvas');
canvas.width = 400;
canvas.height = 300;
var myChart = echarts.init(canvas);
// user defined operations
operations(myChart);
return canvas;
};
/**
* run test with only setOption
* @param {string} name name of the test
* @param {object} option echarts option
*/
helper.testOption = function(name, option) {
var doTest = function(ec) {
var canvas = helper.getRenderedCanvas(ec, function(myChart) {
myChart.setOption(helper.preprocessOption(option));
});
return canvas;
};
it(name, function(done) {
if (STRATEGY === 'content') {
helper.expectEqualCanvasContent(name, doTest, done);
} else if (STRATEGY === 'stack') {
helper.expectEqualCanvasStack(name, doTest, done);
} else {
console.error('Invalid equal canvas strategy!');
}
});
}
/**
* preprocess option and set default values
* @param {object} option echarts option
* @return {object} processed option
*/
helper.preprocessOption = function(option) {
if (typeof option.animation === 'undefined') {
option.animation = false;
}
return option;
}
/**
* run test with setOption for whole spec
* @param {string} specName spec name
* @param {object[]} suites arrary of suites
*/
helper.testOptionSpec = function(specName, suites) {
for (var sid = 0, slen = suites.length; sid < slen; ++sid) {
(function(suiteName, cases) {
describe(suiteName, function() {
for (var cid = 0, clen = cases.length; cid < clen; ++cid) {
var name = specName + ' - ' + suiteName + ': '
+ cases[cid].name;
if (cases[cid].test === 'equalOption') {
helper.expectEqualOption(name, cases[cid].option1,
cases[cid].option2);
} else if (cases[cid].test === 'notEqualOption') {
helper.expectNotEqualOption(name, cases[cid].option1,
cases[cid].option2);
} else {
helper.testOption(name, cases[cid].option);
}
}
});
})(suites[sid].name, suites[sid].cases);
}
}
/**
* @param {string} name name of the test
* @param {string} oldImgSrc old canvas.toDataURL value
* @param {string} newImgSrc new canvas.toDataURL value
* add a failed case in dom
*/
helper.addFailedCases = function(name, oldImgSrc, newImgSrc) {
// group of this case
var group = document.createElement('div');
var title = document.createElement('h6');
title.innerHTML = name + '. Here are old, new, and diff images.';
group.appendChild(title);
// old image and new image
var oldImg = document.createElement('img');
oldImg.src = oldImgSrc;
oldImg.setAttribute('title', 'Old Image');
var newImg = document.createElement('img');
newImg.src = newImgSrc;
newImg.setAttribute('title', 'New Image');
group.appendChild(oldImg);
group.appendChild(newImg);
// diff image
var diff = imagediff.diff(oldImg, newImg);
var canvas = document.createElement('canvas');
canvas.width = oldImg.width;
canvas.height = oldImg.height;
var ctx = canvas.getContext('2d');
ctx.putImageData(diff, 0, 0);
var diffImg = document.createElement('img');
diffImg.src = canvas.toDataURL();
diffImg.setAttribute('title', 'Diff Image');
group.appendChild(diffImg);
failedDom.appendChild(group);
// append to dom
if (!hasFailedDom) {
var body = document.getElementsByTagName('body')[0];
body.appendChild(failedDom);
hasFailedDom = true;
}
};
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