1'use strict';
2require('../common');
3const assert = require('assert');
4
5const buf = Buffer.allocUnsafe(8);
6
7['LE', 'BE'].forEach(function(endianness) {
8  // Should allow simple BigInts to be written and read
9  let val = 123456789n;
10  buf[`writeBigInt64${endianness}`](val, 0);
11  let rtn = buf[`readBigInt64${endianness}`](0);
12  assert.strictEqual(val, rtn);
13
14  // Should allow INT64_MAX to be written and read
15  val = 0x7fffffffffffffffn;
16  buf[`writeBigInt64${endianness}`](val, 0);
17  rtn = buf[`readBigInt64${endianness}`](0);
18  assert.strictEqual(val, rtn);
19
20  // Should read and write a negative signed 64-bit integer
21  val = -123456789n;
22  buf[`writeBigInt64${endianness}`](val, 0);
23  assert.strictEqual(val, buf[`readBigInt64${endianness}`](0));
24
25  // Should read and write an unsigned 64-bit integer
26  val = 123456789n;
27  buf[`writeBigUInt64${endianness}`](val, 0);
28  assert.strictEqual(val, buf[`readBigUInt64${endianness}`](0));
29
30  // Should throw a RangeError upon INT64_MAX+1 being written
31  assert.throws(function() {
32    const val = 0x8000000000000000n;
33    buf[`writeBigInt64${endianness}`](val, 0);
34  }, RangeError);
35
36  // Should throw a RangeError upon UINT64_MAX+1 being written
37  assert.throws(function() {
38    const val = 0x10000000000000000n;
39    buf[`writeBigUInt64${endianness}`](val, 0);
40  }, {
41    code: 'ERR_OUT_OF_RANGE',
42    message: 'The value of "value" is out of range. It must be ' +
43      '>= 0n and < 2n ** 64n. Received 18_446_744_073_709_551_616n'
44  });
45
46  // Should throw a TypeError upon invalid input
47  assert.throws(function() {
48    buf[`writeBigInt64${endianness}`]('bad', 0);
49  }, TypeError);
50
51  // Should throw a TypeError upon invalid input
52  assert.throws(function() {
53    buf[`writeBigUInt64${endianness}`]('bad', 0);
54  }, TypeError);
55});
56