ducky/devices
2015-11-12
Parent:b6494e1a499e
ducky/devices/vendor/code.google.com/p/go-uuid/uuid/version4.go
Start testing our Storers. Set up a file to start testing our Storer implementations, and write a sample test for the happy path of GetDevices--e.g., we expect no errors. This also required us to setup a helper to compare two Device instances and see if they're equal or not, and if not, how they differ. In the future, we'll keep adding test methods to test more logical paths for the interface contract, and to test more of the methods for the interface.
1 // Copyright 2011 Google Inc. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 package uuid
7 // Random returns a Random (Version 4) UUID or panics.
8 //
9 // The strength of the UUIDs is based on the strength of the crypto/rand
10 // package.
11 //
12 // A note about uniqueness derived from from the UUID Wikipedia entry:
13 //
14 // Randomly generated UUIDs have 122 random bits. One's annual risk of being
15 // hit by a meteorite is estimated to be one chance in 17 billion, that
16 // means the probability is about 0.00000000006 (6 × 10−11),
17 // equivalent to the odds of creating a few tens of trillions of UUIDs in a
18 // year and having one duplicate.
19 func NewRandom() UUID {
20 uuid := make([]byte, 16)
21 randomBits([]byte(uuid))
22 uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
23 uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
24 return uuid
25 }