48 lines
1.7 KiB
JavaScript
48 lines
1.7 KiB
JavaScript
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'use strict';
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var PNG = require('pngjs').PNG,
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fs = require('fs'),
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test = require('tap').test,
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path = require('path'),
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match = require('../.');
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diffTest('1a', '1b', '1diff', 0.05, false, 143);
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diffTest('2a', '2b', '2diff', 0.05, false, 12439);
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diffTest('3a', '3b', '3diff', 0.05, false, 212);
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diffTest('4a', '4b', '4diff', 0.05, false, 36089);
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function diffTest(imgPath1, imgPath2, diffPath, threshold, includeAA, expectedMismatch) {
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var name = 'comparing ' + imgPath1 + ' to ' + imgPath2 +
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', threshold: ' + threshold + ', includeAA: ' + includeAA;
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test(name, function (t) {
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var img1 = readImage(imgPath1, function () {
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var img2 = readImage(imgPath2, function () {
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var expectedDiff = readImage(diffPath, function () {
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var diff = new PNG({width: img1.width, height: img1.height});
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var mismatch = match(img1.data, img2.data, diff.data, diff.width, diff.height, {
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threshold: threshold,
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includeAA: includeAA
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});
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var mismatch2 = match(img1.data, img2.data, null, diff.width, diff.height, {
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threshold: threshold,
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includeAA: includeAA
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});
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t.same(diff.data, expectedDiff.data, 'diff image');
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t.same(mismatch, expectedMismatch, 'number of mismatched pixels');
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t.same(mismatch, mismatch2, 'number of mismatched pixels');
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t.end();
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});
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});
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});
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});
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}
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function readImage(name, done) {
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return fs.createReadStream(path.join(__dirname, '/fixtures/' + name + '.png')).pipe(new PNG()).on('parsed', done);
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}
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