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103 lines
3.5 KiB
JavaScript
103 lines
3.5 KiB
JavaScript
// Copyright 2013 Lovell Fuller and others.
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// SPDX-License-Identifier: Apache-2.0
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'use strict';
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const fs = require('fs');
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const assert = require('assert');
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const sharp = require('../../');
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const fixtures = require('../fixtures');
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describe('Clone', function () {
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beforeEach(function () {
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sharp.cache(false);
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});
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afterEach(function () {
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sharp.cache(true);
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});
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it('Read from Stream and write to multiple Streams', function (done) {
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let finishEventsExpected = 2;
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// Output stream 1
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const output1 = fixtures.path('output.multi-stream.1.jpg');
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const writable1 = fs.createWriteStream(output1);
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writable1.on('finish', function () {
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sharp(output1).toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual(true, data.length > 0);
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assert.strictEqual(data.length, info.size);
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(320, info.width);
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assert.strictEqual(240, info.height);
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fs.unlinkSync(output1);
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finishEventsExpected--;
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if (finishEventsExpected === 0) {
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done();
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}
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});
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});
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// Output stream 2
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const output2 = fixtures.path('output.multi-stream.2.jpg');
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const writable2 = fs.createWriteStream(output2);
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writable2.on('finish', function () {
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sharp(output2).toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual(true, data.length > 0);
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assert.strictEqual(data.length, info.size);
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(100, info.width);
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assert.strictEqual(122, info.height);
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fs.unlinkSync(output2);
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finishEventsExpected--;
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if (finishEventsExpected === 0) {
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done();
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}
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});
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});
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// Create parent instance
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const rotator = sharp().rotate(90);
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// Cloned instances with differing dimensions
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rotator.clone().resize(320, 240).pipe(writable1);
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rotator.clone().resize(100, 122).pipe(writable2);
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// Go
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fs.createReadStream(fixtures.inputJpg).pipe(rotator);
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});
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it('Stream-based input attaches finish event listener to original', function () {
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const original = sharp();
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const clone = original.clone();
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assert.strictEqual(1, original.listenerCount('finish'));
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assert.strictEqual(0, clone.listenerCount('finish'));
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});
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it('Non Stream-based input does not attach finish event listeners', function () {
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const original = sharp(fixtures.inputJpg);
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const clone = original.clone();
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assert.strictEqual(0, original.listenerCount('finish'));
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assert.strictEqual(0, clone.listenerCount('finish'));
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});
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it('Ensure deep clone of properties, including arrays', async () => {
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const alpha = await sharp({
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create: { width: 320, height: 240, channels: 3, background: 'red' }
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}).toColourspace('b-w').png().toBuffer();
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const original = sharp();
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const joiner = original.clone().joinChannel(alpha);
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const negater = original.clone().negate();
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fs.createReadStream(fixtures.inputJpg320x240).pipe(original);
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const joined = await joiner.png({ effort: 1 }).toBuffer();
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const negated = await negater.png({ effort: 1 }).toBuffer();
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const joinedMetadata = await sharp(joined).metadata();
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assert.strictEqual(joinedMetadata.channels, 4);
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assert.strictEqual(joinedMetadata.hasAlpha, true);
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const negatedMetadata = await sharp(negated).metadata();
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assert.strictEqual(negatedMetadata.channels, 3);
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assert.strictEqual(negatedMetadata.hasAlpha, false);
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});
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});
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