// Load modules

var Code = require('code'); var Cryptiles = require('..'); var Lab = require('lab');

// Declare internals

var internals = {};

// Test shortcuts

var lab = exports.lab = Lab.script(); var describe = lab.describe; var it = lab.it; var expect = Code.expect;

describe('randomString()', function () {

it('should generate the right length string', function (done) {

    for (var i = 1; i <= 1000; ++i) {
        expect(Cryptiles.randomString(i).length).to.equal(i);
    }

    done();
});

it('returns an error on invalid bits size', function (done) {

    expect(Cryptiles.randomString(99999999999999999999).message).to.match(/Failed generating random bits/);
    done();
});

});

describe('randomBits()', function () {

it('returns an error on invalid input', function (done) {

    expect(Cryptiles.randomBits(0).message).to.equal('Invalid random bits count');
    done();
});

});

describe('fixedTimeComparison()', function () {

var a = Cryptiles.randomString(50000);
var b = Cryptiles.randomString(150000);

it('should take the same amount of time comparing different string sizes', function (done) {

    var now = Date.now();
    Cryptiles.fixedTimeComparison(b, a);
    var t1 = Date.now() - now;

    now = Date.now();
    Cryptiles.fixedTimeComparison(b, b);
    var t2 = Date.now() - now;

    expect(t2 - t1).to.be.within(-20, 20);
    done();
});

it('should return true for equal strings', function (done) {

    expect(Cryptiles.fixedTimeComparison(a, a)).to.equal(true);
    done();
});

it('should return false for different strings (size, a < b)', function (done) {

    expect(Cryptiles.fixedTimeComparison(a, a + 'x')).to.equal(false);
    done();
});

it('should return false for different strings (size, a > b)', function (done) {

    expect(Cryptiles.fixedTimeComparison(a + 'x', a)).to.equal(false);
    done();
});

it('should return false for different strings (size, a = b)', function (done) {

    expect(Cryptiles.fixedTimeComparison(a + 'x', a + 'y')).to.equal(false);
    done();
});

it('should return false when not a string', function (done) {

    expect(Cryptiles.fixedTimeComparison('x', null)).to.equal(false);
    done();
});

it('should return false when not a string (left)', function (done) {

    expect(Cryptiles.fixedTimeComparison(null, 'x')).to.equal(false);
    done();
});

});