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// Load modules
var Lab = require('lab');
var Cryptiles = require('../lib');
// Declare internals
var internals = {};
// Test shortcuts
var lab = exports.lab = Lab.script();
var before = lab.before;
var after = lab.after;
var describe = lab.experiment;
var it = lab.test;
var expect = Lab.expect;
describe('Cryptiles', function () {
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.equal('Failed generating random bits: Argument #1 must be number > 0');
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();
});
});
});
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