test: assert write return values in buffer-bigint64 · nodejs/node@eb3576f

require('../common');

const assert = require('assert');

const buf = Buffer.allocUnsafe(8);

const buf = Buffer.allocUnsafe(9);

['LE', 'BE'].forEach(function(endianness) {

// Should allow simple BigInts to be written and read

buf[`writeBigUInt64${endianness}`](val, 0);

assert.strictEqual(val, buf[`readBigUInt64${endianness}`](0));

assert.strictEqual(buf[`writeBigUInt64${endianness}`](val, 0), 8);

assert.strictEqual(buf[`writeBigInt64${endianness}`](val, 0), 8);

assert.strictEqual(buf[`writeBigUInt64${endianness}`](val, 1), 9);

assert.strictEqual(buf[`writeBigInt64${endianness}`](val, 1), 9);

// Should throw a RangeError upon INT64_MAX+1 being written

assert.throws(function() {

const val = 0x8000000000000000n;