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test-buffer-bigint64.js
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60 lines (50 loc) · 2.01 KB
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'use strict';
require('../common');
const assert = require('assert');
const buf = Buffer.allocUnsafe(9);
['LE', 'BE'].forEach(function(endianness) {
// Should allow simple BigInts to be written and read
let val = 123456789n;
buf[`writeBigInt64${endianness}`](val, 0);
let rtn = buf[`readBigInt64${endianness}`](0);
assert.strictEqual(rtn, val);
// Should allow INT64_MAX to be written and read
val = 0x7fffffffffffffffn;
buf[`writeBigInt64${endianness}`](val, 0);
rtn = buf[`readBigInt64${endianness}`](0);
assert.strictEqual(rtn, val);
// Should read and write a negative signed 64-bit integer
val = -123456789n;
buf[`writeBigInt64${endianness}`](val, 0);
assert.strictEqual(buf[`readBigInt64${endianness}`](0), val);
// Should read and write an unsigned 64-bit integer
val = 123456789n;
buf[`writeBigUInt64${endianness}`](val, 0);
assert.strictEqual(buf[`readBigUInt64${endianness}`](0), val);
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;
buf[`writeBigInt64${endianness}`](val, 0);
}, RangeError);
// Should throw a RangeError upon UINT64_MAX+1 being written
assert.throws(function() {
const val = 0x10000000000000000n;
buf[`writeBigUInt64${endianness}`](val, 0);
}, {
code: 'ERR_OUT_OF_RANGE',
message: 'The value of "value" is out of range. It must be ' +
'>= 0n and < 2n ** 64n. Received 18_446_744_073_709_551_616n'
});
// Should throw a TypeError upon invalid input
assert.throws(function() {
buf[`writeBigInt64${endianness}`]('bad', 0);
}, TypeError);
// Should throw a TypeError upon invalid input
assert.throws(function() {
buf[`writeBigUInt64${endianness}`]('bad', 0);
}, TypeError);
});