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'use strict'; const common = require('../common'); const assert = require('assert'); const zlib = require('zlib'); // Tests that zlib streams support .reset() and .params() // before the first write. That is important to ensure that // lazy init of zlib native library handles these cases. for (const fn of [ (z, cb) => { z.reset(); cb(); }, (z, cb) => z.params(0, zlib.constants.Z_DEFAULT_STRATEGY, cb), ]) { const deflate = zlib.createDeflate(); const inflate = zlib.createInflate(); deflate.pipe(inflate); const output = []; inflate .on('error', (err) => { assert.ifError(err); }) .on('data', (chunk) => output.push(chunk)) .on('end', common.mustCall( () => assert.strictEqual(Buffer.concat(output).toString(), 'abc'))); fn(deflate, () => { fn(inflate, () => { deflate.write('abc'); deflate.end(); }); }); }