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sharp/test/unit/stats.js

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'use strict';
const fs = require('fs');
const assert = require('assert');
const sharp = require('../../');
const fixtures = require('../fixtures');
// Test Helpers
var threshold = 0.001;
function isInAcceptableRange (actual, expected) {
return actual >= ((1 - threshold) * expected) && actual <= ((1 + threshold) * expected);
}
function isInRange (actual, min, max) {
return actual >= min && actual <= max;
}
function isInteger (val) {
return Number.isInteger(val);
}
describe('Image Stats', function () {
it('JPEG', function (done) {
sharp(fixtures.inputJpg).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 615101275));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 83061892917));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 101.44954540768993));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 58.373870588815414));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
// green channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 462824115));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 47083677255));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 76.33425255128337));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 44.03023262954866));
assert.strictEqual(true, isInteger(stats.channels[1]['minX']));
assert.strictEqual(true, isInRange(stats.channels[1]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[1]['minY']));
assert.strictEqual(true, isInRange(stats.channels[1]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[1]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[1]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxY'], 0, 2725));
// blue channel
assert.strictEqual(0, stats.channels[2]['min']);
assert.strictEqual(255, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 372986756));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 32151543524));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 61.51724663436759));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 38.96702865090125));
assert.strictEqual(true, isInteger(stats.channels[2]['minX']));
assert.strictEqual(true, isInRange(stats.channels[2]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[2]['minY']));
assert.strictEqual(true, isInRange(stats.channels[2]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[2]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[2]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxY'], 0, 2725));
done();
});
});
it('PNG without transparency', function (done) {
sharp(fixtures.inputPng).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 1391368230));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 354798898650));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 238.8259925648822));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 62.15121915523771));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2809));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2074));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2809));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2074));
done();
});
});
it('PNG with transparency', function (done) {
sharp(fixtures.inputPngWithTransparency).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(false, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 795678795));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 202898092725));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 252.9394769668579));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 22.829537532816));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 1536));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 1536));
// green channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 795678795));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 202898092725));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 252.9394769668579));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 22.829537532816));
assert.strictEqual(true, isInteger(stats.channels[1]['minX']));
assert.strictEqual(true, isInRange(stats.channels[1]['minX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[1]['minY']));
assert.strictEqual(true, isInRange(stats.channels[1]['minY'], 0, 1536));
assert.strictEqual(true, isInteger(stats.channels[1]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[1]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxY'], 0, 1536));
// blue channel
assert.strictEqual(0, stats.channels[2]['min']);
assert.strictEqual(255, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 795678795));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 202898092725));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 252.9394769668579));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 22.829537532816));
assert.strictEqual(true, isInteger(stats.channels[2]['minX']));
assert.strictEqual(true, isInRange(stats.channels[2]['minX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[2]['minY']));
assert.strictEqual(true, isInRange(stats.channels[2]['minY'], 0, 1536));
assert.strictEqual(true, isInteger(stats.channels[2]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[2]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxY'], 0, 1536));
// alpha channel
assert.strictEqual(0, stats.channels[3]['min']);
assert.strictEqual(255, stats.channels[3]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['sum'], 5549142));
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['squaresSum'], 1333571132));
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['mean'], 1.7640247344970703));
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['stdev'], 20.51387814157297));
assert.strictEqual(true, isInteger(stats.channels[3]['minX']));
assert.strictEqual(true, isInRange(stats.channels[3]['minX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[3]['minY']));
assert.strictEqual(true, isInRange(stats.channels[3]['minY'], 0, 1536));
assert.strictEqual(true, isInteger(stats.channels[3]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[3]['maxX'], 0, 2048));
assert.strictEqual(true, isInteger(stats.channels[3]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[3]['maxY'], 0, 1536));
done();
});
});
it('PNG fully transparent', function (done) {
sharp(fixtures.inputPngCompleteTransparency).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(false, stats.isOpaque);
// alpha channel
assert.strictEqual(0, stats.channels[3]['min']);
assert.strictEqual(0, stats.channels[3]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['sum'], 0));
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['squaresSum'], 0));
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['mean'], 0));
assert.strictEqual(true, isInAcceptableRange(stats.channels[3]['stdev'], 0));
assert.strictEqual(true, isInteger(stats.channels[3]['minX']));
assert.strictEqual(true, isInRange(stats.channels[3]['minX'], 0, 300));
assert.strictEqual(true, isInteger(stats.channels[3]['minY']));
assert.strictEqual(true, isInRange(stats.channels[3]['minY'], 0, 300));
assert.strictEqual(true, isInteger(stats.channels[3]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[3]['maxX'], 0, 300));
assert.strictEqual(true, isInteger(stats.channels[3]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[3]['maxY'], 0, 300));
done();
});
});
it('Tiff', function (done) {
sharp(fixtures.inputTiff).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 1887266220));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 481252886100));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 235.81772349417824));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 67.25712856093298));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2464));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 3248));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2464));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 3248));
done();
});
});
it('WebP', function (done) {
sharp(fixtures.inputWebP).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 83291370));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 11379783198));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 105.36169496842616));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 57.39412151419967));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 1024));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 772));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 1024));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 772));
// green channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 120877425));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 20774687595));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 152.9072025279307));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 53.84143349689916));
assert.strictEqual(true, isInteger(stats.channels[1]['minX']));
assert.strictEqual(true, isInRange(stats.channels[1]['minX'], 0, 1024));
assert.strictEqual(true, isInteger(stats.channels[1]['minY']));
assert.strictEqual(true, isInRange(stats.channels[1]['minY'], 0, 772));
assert.strictEqual(true, isInteger(stats.channels[1]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxX'], 0, 1024));
assert.strictEqual(true, isInteger(stats.channels[1]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxY'], 0, 772));
// blue channel
assert.strictEqual(0, stats.channels[2]['min']);
assert.strictEqual(255, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 138938859));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 28449125593));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 175.75450711423252));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 71.39929031070358));
assert.strictEqual(true, isInteger(stats.channels[2]['minX']));
assert.strictEqual(true, isInRange(stats.channels[2]['minX'], 0, 1024));
assert.strictEqual(true, isInteger(stats.channels[2]['minY']));
assert.strictEqual(true, isInRange(stats.channels[2]['minY'], 0, 772));
assert.strictEqual(true, isInteger(stats.channels[2]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxX'], 0, 1024));
assert.strictEqual(true, isInteger(stats.channels[2]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxY'], 0, 772));
done();
});
});
it('GIF', function (done) {
sharp(fixtures.inputGif).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(35, stats.channels[0]['min']);
assert.strictEqual(254, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 56088385));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 8002132113));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 131.53936444652908));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 38.26389131415863));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 800));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 533));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 800));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 533));
// green channel
assert.strictEqual(43, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 58612156));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 8548344254));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 137.45815196998123));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 33.955424103758205));
assert.strictEqual(true, isInteger(stats.channels[1]['minX']));
assert.strictEqual(true, isInRange(stats.channels[1]['minX'], 0, 800));
assert.strictEqual(true, isInteger(stats.channels[1]['minY']));
assert.strictEqual(true, isInRange(stats.channels[1]['minY'], 0, 533));
assert.strictEqual(true, isInteger(stats.channels[1]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxX'], 0, 800));
assert.strictEqual(true, isInteger(stats.channels[1]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxY'], 0, 533));
// blue channel
assert.strictEqual(51, stats.channels[2]['min']);
assert.strictEqual(254, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 49628525));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 6450556071));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 116.38959896810506));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 39.7669551046809));
assert.strictEqual(true, isInteger(stats.channels[2]['minX']));
assert.strictEqual(true, isInRange(stats.channels[2]['minX'], 0, 800));
assert.strictEqual(true, isInteger(stats.channels[2]['minY']));
assert.strictEqual(true, isInRange(stats.channels[2]['minY'], 0, 533));
assert.strictEqual(true, isInteger(stats.channels[2]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxX'], 0, 800));
assert.strictEqual(true, isInteger(stats.channels[2]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxY'], 0, 533));
done();
});
});
it('Grayscale GIF with alpha', function (done) {
sharp(fixtures.inputGifGreyPlusAlpha).stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(false, stats.isOpaque);
// gray channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(101, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 101));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 10201));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 50.5));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 71.4177848998413));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 1));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 1));
// alpha channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 255));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 65025));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 127.5));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 180.31222920256963));
assert.strictEqual(true, isInteger(stats.channels[1]['minX']));
assert.strictEqual(true, isInRange(stats.channels[1]['minX'], 0, 2));
assert.strictEqual(true, isInteger(stats.channels[1]['minY']));
assert.strictEqual(true, isInRange(stats.channels[1]['minY'], 0, 1));
assert.strictEqual(true, isInteger(stats.channels[1]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxX'], 0, 2));
assert.strictEqual(true, isInteger(stats.channels[1]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxY'], 0, 1));
done();
});
});
it('Stream in, Callback out', function (done) {
const readable = fs.createReadStream(fixtures.inputJpg);
const pipeline = sharp().stats(function (err, stats) {
if (err) throw err;
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 615101275));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 83061892917));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 101.44954540768993));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 58.373870588815414));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
// green channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 462824115));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 47083677255));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 76.33425255128337));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 44.03023262954866));
assert.strictEqual(true, isInteger(stats.channels[1]['minX']));
assert.strictEqual(true, isInRange(stats.channels[1]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[1]['minY']));
assert.strictEqual(true, isInRange(stats.channels[1]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[1]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[1]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[1]['maxY'], 0, 2725));
// blue channel
assert.strictEqual(0, stats.channels[2]['min']);
assert.strictEqual(255, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 372986756));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 32151543524));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 61.51724663436759));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 38.96702865090125));
assert.strictEqual(true, isInteger(stats.channels[2]['minX']));
assert.strictEqual(true, isInRange(stats.channels[2]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[2]['minY']));
assert.strictEqual(true, isInRange(stats.channels[2]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[2]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[2]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[2]['maxY'], 0, 2725));
done();
});
readable.pipe(pipeline);
});
it('Stream in, Promise out', function () {
const pipeline = sharp();
fs.createReadStream(fixtures.inputJpg).pipe(pipeline);
return pipeline.stats().then(function (stats) {
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 615101275));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 83061892917));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 101.44954540768993));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 58.373870588815414));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
// green channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 462824115));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 47083677255));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 76.33425255128337));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 44.03023262954866));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
// blue channel
assert.strictEqual(0, stats.channels[2]['min']);
assert.strictEqual(255, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 372986756));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 32151543524));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 61.51724663436759));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 38.96702865090125));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
}).catch(function (err) {
throw err;
});
});
it('File in, Promise out', function () {
return sharp(fixtures.inputJpg).stats().then(function (stats) {
assert.strictEqual(true, stats.isOpaque);
// red channel
assert.strictEqual(0, stats.channels[0]['min']);
assert.strictEqual(255, stats.channels[0]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['sum'], 615101275));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['squaresSum'], 83061892917));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['mean'], 101.44954540768993));
assert.strictEqual(true, isInAcceptableRange(stats.channels[0]['stdev'], 58.373870588815414));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
// green channel
assert.strictEqual(0, stats.channels[1]['min']);
assert.strictEqual(255, stats.channels[1]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['sum'], 462824115));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['squaresSum'], 47083677255));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['mean'], 76.33425255128337));
assert.strictEqual(true, isInAcceptableRange(stats.channels[1]['stdev'], 44.03023262954866));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
// blue channel
assert.strictEqual(0, stats.channels[2]['min']);
assert.strictEqual(255, stats.channels[2]['max']);
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['sum'], 372986756));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['squaresSum'], 32151543524));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['mean'], 61.51724663436759));
assert.strictEqual(true, isInAcceptableRange(stats.channels[2]['stdev'], 38.96702865090125));
assert.strictEqual(true, isInteger(stats.channels[0]['minX']));
assert.strictEqual(true, isInRange(stats.channels[0]['minX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['minY']));
assert.strictEqual(true, isInRange(stats.channels[0]['minY'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxX']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxX'], 0, 2725));
assert.strictEqual(true, isInteger(stats.channels[0]['maxY']));
assert.strictEqual(true, isInRange(stats.channels[0]['maxY'], 0, 2725));
}).catch(function (err) {
throw err;
});
});
it('File input with corrupt header fails gracefully', function (done) {
sharp(fixtures.inputJpgWithCorruptHeader)
.stats(function (err) {
assert.strictEqual(true, !!err);
done();
});
});
it('File input with corrupt header fails gracefully, Promise out', function () {
return sharp(fixtures.inputJpgWithCorruptHeader)
.stats().then(function (stats) {
throw new Error('Corrupt Header file');
}).catch(function (err) {
assert.ok(!!err);
});
});
it('File input with corrupt header fails gracefully, Stream In, Promise Out', function () {
const pipeline = sharp();
fs.createReadStream(fixtures.inputJpgWithCorruptHeader).pipe(pipeline);
return pipeline
.stats().then(function (stats) {
throw new Error('Corrupt Header file');
}).catch(function (err) {
assert.ok(!!err);
});
});
it('Buffer input with corrupt header fails gracefully', function (done) {
sharp(fs.readFileSync(fixtures.inputJpgWithCorruptHeader))
.stats(function (err) {
assert.strictEqual(true, !!err);
done();
});
});
it('Non-existent file in, Promise out', function (done) {
sharp('fail').stats().then(function (stats) {
throw new Error('Non-existent file');
}, function (err) {
assert.ok(!!err);
done();
});
});
});
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