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'use strict';
const common = require('../common');
const assert = require('assert');
const outsideBounds = common.expectsError({
code: 'ERR_BUFFER_OUT_OF_BOUNDS',
type: RangeError,
message: 'Attempt to write outside buffer bounds'
}, 2);
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.includes('-'))
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 = common.expectsError({
code: 'ERR_UNKNOWN_ENCODING',
type: TypeError,
message: `Unknown encoding: ${encoding}`
});
assert.ok(!Buffer.isEncoding(encoding));
assert.throws(() => Buffer.alloc(9).write('foo', encoding), error);
}
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