ducky/devices
2015-11-12
Parent:b6494e1a499e
ducky/devices/vendor/code.google.com/p/go-uuid/uuid/version1.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.
| paddy@0 | 1 // Copyright 2011 Google Inc. All rights reserved. |
| paddy@0 | 2 // Use of this source code is governed by a BSD-style |
| paddy@0 | 3 // license that can be found in the LICENSE file. |
| paddy@0 | 4 |
| paddy@0 | 5 package uuid |
| paddy@0 | 6 |
| paddy@0 | 7 import ( |
| paddy@0 | 8 "encoding/binary" |
| paddy@0 | 9 ) |
| paddy@0 | 10 |
| paddy@0 | 11 // NewUUID returns a Version 1 UUID based on the current NodeID and clock |
| paddy@0 | 12 // sequence, and the current time. If the NodeID has not been set by SetNodeID |
| paddy@0 | 13 // or SetNodeInterface then it will be set automatically. If the NodeID cannot |
| paddy@0 | 14 // be set NewUUID returns nil. If clock sequence has not been set by |
| paddy@0 | 15 // SetClockSequence then it will be set automatically. If GetTime fails to |
| paddy@0 | 16 // return the current NewUUID returns nil. |
| paddy@0 | 17 func NewUUID() UUID { |
| paddy@0 | 18 if nodeID == nil { |
| paddy@0 | 19 SetNodeInterface("") |
| paddy@0 | 20 } |
| paddy@0 | 21 |
| paddy@0 | 22 now, seq, err := GetTime() |
| paddy@0 | 23 if err != nil { |
| paddy@0 | 24 return nil |
| paddy@0 | 25 } |
| paddy@0 | 26 |
| paddy@0 | 27 uuid := make([]byte, 16) |
| paddy@0 | 28 |
| paddy@0 | 29 time_low := uint32(now & 0xffffffff) |
| paddy@0 | 30 time_mid := uint16((now >> 32) & 0xffff) |
| paddy@0 | 31 time_hi := uint16((now >> 48) & 0x0fff) |
| paddy@0 | 32 time_hi |= 0x1000 // Version 1 |
| paddy@0 | 33 |
| paddy@0 | 34 binary.BigEndian.PutUint32(uuid[0:], time_low) |
| paddy@0 | 35 binary.BigEndian.PutUint16(uuid[4:], time_mid) |
| paddy@0 | 36 binary.BigEndian.PutUint16(uuid[6:], time_hi) |
| paddy@0 | 37 binary.BigEndian.PutUint16(uuid[8:], seq) |
| paddy@0 | 38 copy(uuid[10:], nodeID) |
| paddy@0 | 39 |
| paddy@0 | 40 return uuid |
| paddy@0 | 41 } |