'use strict'; require('../common'); const assert = require('assert'); const outsideBounds = /^RangeError: Attempt to write outside buffer bounds$/; assert.throws(() => Buffer.alloc(9).write('foo', -1), outsideBounds); assert.throws(() => Buffer.alloc(9).write('foo', 10), outsideBounds); const resultMap = new Map([ ['utf8', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])], ['ucs2', Buffer.from([102, 0, 111, 0, 111, 0, 0, 0, 0])], ['ascii', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])], ['latin1', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])], ['binary', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])], ['utf16le', Buffer.from([102, 0, 111, 0, 111, 0, 0, 0, 0])], ['base64', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])], ['hex', Buffer.from([102, 111, 111, 0, 0, 0, 0, 0, 0])] ]); // utf8, ucs2, ascii, latin1, utf16le const encodings = ['utf8', 'utf-8', 'ucs2', 'ucs-2', 'ascii', 'latin1', 'binary', 'utf16le', 'utf-16le']; encodings .reduce((es, e) => es.concat(e, e.toUpperCase()), []) .forEach((encoding) => { const buf = Buffer.alloc(9); const len = Buffer.byteLength('foo', encoding); assert.strictEqual(buf.write('foo', 0, len, encoding), len); if (encoding.indexOf('-') !== -1) encoding = encoding.replace('-', ''); assert.deepStrictEqual(buf, resultMap.get(encoding.toLowerCase())); }); // base64 ['base64', 'BASE64'].forEach((encoding) => { const buf = Buffer.alloc(9); const len = Buffer.byteLength('Zm9v', encoding); assert.strictEqual(buf.write('Zm9v', 0, len, encoding), len); assert.deepStrictEqual(buf, resultMap.get(encoding.toLowerCase())); }); // hex ['hex', 'HEX'].forEach((encoding) => { const buf = Buffer.alloc(9); const len = Buffer.byteLength('666f6f', encoding); assert.strictEqual(buf.write('666f6f', 0, len, encoding), len); assert.deepStrictEqual(buf, resultMap.get(encoding.toLowerCase())); }); // Invalid encodings for (let i = 1; i < 10; i++) { const encoding = String(i).repeat(i); const error = new RegExp(`^TypeError: Unknown encoding: ${encoding}$`); assert.ok(!Buffer.isEncoding(encoding)); assert.throws(() => Buffer.alloc(9).write('foo', encoding), error); }