'use strict';

const common = require('../common');

const assert = require('assert');

if (!common.hasCrypto) {

common.skip('missing crypto');

return;

}

const crypto = require('crypto');

assert.strictEqual(

crypto.timingSafeEqual(Buffer.from('foo'), Buffer.from('foo')),

true,

'should consider equal strings to be equal'

);

assert.strictEqual(

crypto.timingSafeEqual(Buffer.from('foo'), Buffer.from('bar')),

false,

'should consider unequal strings to be unequal'

);

assert.throws(function() {

crypto.timingSafeEqual(Buffer.from([1, 2, 3]), Buffer.from([1, 2]));

}, /^TypeError: Input buffers must have the same length$/,

'should throw when given buffers with different lengths');

assert.throws(function() {

crypto.timingSafeEqual('not a buffer', Buffer.from([1, 2]));

}, /^TypeError: First argument must be a buffer$/,

'should throw if the first argument is not a buffer');

assert.throws(function() {

crypto.timingSafeEqual(Buffer.from([1, 2]), 'not a buffer');

}, /^TypeError: Second argument must be a buffer$/,

'should throw if the second argument is not a buffer');