11cb0ef41Sopenharmony_ci'use strict'; 21cb0ef41Sopenharmony_ci 31cb0ef41Sopenharmony_ciconst common = require('../common'); 41cb0ef41Sopenharmony_ciconst assert = require('assert'); 51cb0ef41Sopenharmony_ciconst { Transform } = require('stream'); 61cb0ef41Sopenharmony_ci 71cb0ef41Sopenharmony_ciconst t = new Transform({ 81cb0ef41Sopenharmony_ci objectMode: true, highWaterMark: 0, 91cb0ef41Sopenharmony_ci transform(chunk, enc, callback) { 101cb0ef41Sopenharmony_ci process.nextTick(() => callback(null, chunk, enc)); 111cb0ef41Sopenharmony_ci } 121cb0ef41Sopenharmony_ci}); 131cb0ef41Sopenharmony_ci 141cb0ef41Sopenharmony_ciassert.strictEqual(t.write(1), false); 151cb0ef41Sopenharmony_cit.on('drain', common.mustCall(() => { 161cb0ef41Sopenharmony_ci assert.strictEqual(t.write(2), false); 171cb0ef41Sopenharmony_ci t.end(); 181cb0ef41Sopenharmony_ci})); 191cb0ef41Sopenharmony_ci 201cb0ef41Sopenharmony_cit.once('readable', common.mustCall(() => { 211cb0ef41Sopenharmony_ci assert.strictEqual(t.read(), 1); 221cb0ef41Sopenharmony_ci setImmediate(common.mustCall(() => { 231cb0ef41Sopenharmony_ci assert.strictEqual(t.read(), null); 241cb0ef41Sopenharmony_ci t.once('readable', common.mustCall(() => { 251cb0ef41Sopenharmony_ci assert.strictEqual(t.read(), 2); 261cb0ef41Sopenharmony_ci })); 271cb0ef41Sopenharmony_ci })); 281cb0ef41Sopenharmony_ci})); 29