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test.js
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test.js
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import {promisify} from 'node:util';
import fs from 'node:fs';
import path from 'node:path';
import url from 'node:url';
import test from 'ava';
import isPng from 'is-png';
import imageminPngquant from './index.js';
const readFile = promisify(fs.readFile);
const thisDirname = url.fileURLToPath(new URL('.', import.meta.url));
const thisFilename = url.fileURLToPath(import.meta.url);
test('optimize a PNG', async t => {
const buffer = await readFile(path.join(thisDirname, 'fixture.png'));
const data = await imageminPngquant()(buffer);
t.true(data.length < buffer.length);
t.true(isPng(data));
});
test('support pngquant options', async t => {
const buffer = await readFile(path.join(thisDirname, 'fixture.png'));
const data = await imageminPngquant({
speed: 10,
quality: [0.8, 1],
strip: true,
dithering: false,
posterize: 1,
verbose: false,
})(buffer);
t.true(data.length > (30 * 1000));
t.true(isPng(data));
});
test('support streams', async t => {
const buffer = await readFile(path.join(thisDirname, 'fixture.png'));
const stream = fs.createReadStream(path.join(thisDirname, 'fixture.png'));
const data = await imageminPngquant()(stream);
t.true(data.length < buffer.length);
t.true(isPng(data));
});
test('skip optimizing a non-PNG file', async t => {
const buffer = await readFile(thisFilename);
const data = await imageminPngquant()(buffer);
t.is(data.length, buffer.length);
});
test('handles non-buffer, non-stream input', t => {
const badInput = {};
return t.throwsAsync(() => imageminPngquant()(badInput), {
message: `Expected a Buffer or Stream, got ${typeof badInput}`,
});
});