sharp/test/unit/clone.js
2023-02-28 17:01:58 +00:00

81 lines
2.6 KiB
JavaScript

// Copyright 2013 Lovell Fuller and others.
// SPDX-License-Identifier: Apache-2.0
'use strict';
const fs = require('fs');
const assert = require('assert');
const sharp = require('../../');
const fixtures = require('../fixtures');
describe('Clone', function () {
beforeEach(function () {
sharp.cache(false);
});
afterEach(function () {
sharp.cache(true);
});
it('Read from Stream and write to multiple Streams', function (done) {
let finishEventsExpected = 2;
// Output stream 1
const output1 = fixtures.path('output.multi-stream.1.jpg');
const writable1 = fs.createWriteStream(output1);
writable1.on('finish', function () {
sharp(output1).toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual(data.length, info.size);
assert.strictEqual('jpeg', info.format);
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
fs.unlinkSync(output1);
finishEventsExpected--;
if (finishEventsExpected === 0) {
done();
}
});
});
// Output stream 2
const output2 = fixtures.path('output.multi-stream.2.jpg');
const writable2 = fs.createWriteStream(output2);
writable2.on('finish', function () {
sharp(output2).toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual(data.length, info.size);
assert.strictEqual('jpeg', info.format);
assert.strictEqual(100, info.width);
assert.strictEqual(122, info.height);
fs.unlinkSync(output2);
finishEventsExpected--;
if (finishEventsExpected === 0) {
done();
}
});
});
// Create parent instance
const rotator = sharp().rotate(90);
// Cloned instances with differing dimensions
rotator.clone().resize(320, 240).pipe(writable1);
rotator.clone().resize(100, 122).pipe(writable2);
// Go
fs.createReadStream(fixtures.inputJpg).pipe(rotator);
});
it('Stream-based input attaches finish event listener to original', function () {
const original = sharp();
const clone = original.clone();
assert.strictEqual(1, original.listenerCount('finish'));
assert.strictEqual(0, clone.listenerCount('finish'));
});
it('Non Stream-based input does not attach finish event listeners', function () {
const original = sharp(fixtures.inputJpg);
const clone = original.clone();
assert.strictEqual(0, original.listenerCount('finish'));
assert.strictEqual(0, clone.listenerCount('finish'));
});
});