11cb0ef41Sopenharmony_ci'use strict'; 21cb0ef41Sopenharmony_ci 31cb0ef41Sopenharmony_ciconst common = require('../common'); 41cb0ef41Sopenharmony_ciconst assert = require('assert'); 51cb0ef41Sopenharmony_ciconst path = require('path'); 61cb0ef41Sopenharmony_ciconst { open, readFile } = require('fs').promises; 71cb0ef41Sopenharmony_ciconst tmpdir = require('../common/tmpdir'); 81cb0ef41Sopenharmony_ci 91cb0ef41Sopenharmony_citmpdir.refresh(); 101cb0ef41Sopenharmony_ci 111cb0ef41Sopenharmony_ciasync function validateTruncate() { 121cb0ef41Sopenharmony_ci const text = 'Hello world'; 131cb0ef41Sopenharmony_ci const filename = path.resolve(tmpdir.path, 'truncate-file.txt'); 141cb0ef41Sopenharmony_ci const fileHandle = await open(filename, 'w+'); 151cb0ef41Sopenharmony_ci 161cb0ef41Sopenharmony_ci const buffer = Buffer.from(text, 'utf8'); 171cb0ef41Sopenharmony_ci await fileHandle.write(buffer, 0, buffer.length); 181cb0ef41Sopenharmony_ci 191cb0ef41Sopenharmony_ci assert.strictEqual((await readFile(filename)).toString(), text); 201cb0ef41Sopenharmony_ci 211cb0ef41Sopenharmony_ci await fileHandle.truncate(5); 221cb0ef41Sopenharmony_ci assert.strictEqual((await readFile(filename)).toString(), 'Hello'); 231cb0ef41Sopenharmony_ci 241cb0ef41Sopenharmony_ci await fileHandle.close(); 251cb0ef41Sopenharmony_ci} 261cb0ef41Sopenharmony_ci 271cb0ef41Sopenharmony_civalidateTruncate().then(common.mustCall()); 28