'use strict'; const common = require('../common'); const assert = require('assert'); const stream = require('stream'); const writable = new stream.Writable(); writable._write = (chunk, encoding, cb) => { // The state finished should start in false. assert.strictEqual(writable._writableState.finished, false); cb(); }; writable.on('finish', common.mustCall(() => { assert.strictEqual(writable._writableState.finished, true); })); writable.end('testing finished state', common.mustCall(() => { assert.strictEqual(writable._writableState.finished, true); }));