| /* |
| Copyright 2016 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package aws |
| |
| import "testing" |
| |
| func TestDeviceAllocator(t *testing.T) { |
| tests := []struct { |
| name string |
| existingDevices ExistingDevices |
| deviceMap map[mountDevice]int |
| expectedOutput mountDevice |
| }{ |
| { |
| "empty device list with wrap", |
| ExistingDevices{}, |
| generateUnsortedDeviceList(), |
| "bd", // next to 'zz' is the first one, 'ba' |
| }, |
| } |
| |
| for _, test := range tests { |
| allocator := NewDeviceAllocator().(*deviceAllocator) |
| for k, v := range test.deviceMap { |
| allocator.possibleDevices[k] = v |
| } |
| |
| got, err := allocator.GetNext(test.existingDevices) |
| if err != nil { |
| t.Errorf("text %q: unexpected error: %v", test.name, err) |
| } |
| if got != test.expectedOutput { |
| t.Errorf("text %q: expected %q, got %q", test.name, test.expectedOutput, got) |
| } |
| } |
| } |
| |
| func generateUnsortedDeviceList() map[mountDevice]int { |
| possibleDevices := make(map[mountDevice]int) |
| for _, firstChar := range []rune{'b', 'c'} { |
| for i := 'a'; i <= 'z'; i++ { |
| dev := mountDevice([]rune{firstChar, i}) |
| possibleDevices[dev] = 3 |
| } |
| } |
| possibleDevices["bd"] = 0 |
| return possibleDevices |
| } |
| |
| func TestDeviceAllocatorError(t *testing.T) { |
| allocator := NewDeviceAllocator().(*deviceAllocator) |
| existingDevices := ExistingDevices{} |
| |
| // make all devices used |
| var first, second byte |
| for first = 'b'; first <= 'c'; first++ { |
| for second = 'a'; second <= 'z'; second++ { |
| device := [2]byte{first, second} |
| existingDevices[mountDevice(device[:])] = "used" |
| } |
| } |
| |
| device, err := allocator.GetNext(existingDevices) |
| if err == nil { |
| t.Errorf("expected error, got device %q", device) |
| } |
| } |