a16ee2f514
In AWS environment when attach fails on the node lets not use device from the pool. This makes sure we don't reuse recently freed devices
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package aws
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import "testing"
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func TestDeviceAllocator(t *testing.T) {
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tests := []struct {
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name string
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existingDevices ExistingDevices
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deviceMap map[mountDevice]int
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expectedOutput mountDevice
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}{
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{
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"empty device list with wrap",
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ExistingDevices{},
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generateUnsortedDeviceList(),
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"bd", // next to 'zz' is the first one, 'ba'
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},
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}
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for _, test := range tests {
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allocator := NewDeviceAllocator().(*deviceAllocator)
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for k, v := range test.deviceMap {
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allocator.possibleDevices[k] = v
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}
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got, err := allocator.GetNext(test.existingDevices)
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if err != nil {
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t.Errorf("text %q: unexpected error: %v", test.name, err)
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}
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if got != test.expectedOutput {
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t.Errorf("text %q: expected %q, got %q", test.name, test.expectedOutput, got)
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}
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}
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}
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func generateUnsortedDeviceList() map[mountDevice]int {
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possibleDevices := make(map[mountDevice]int)
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for _, firstChar := range []rune{'b', 'c'} {
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for i := 'a'; i <= 'z'; i++ {
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dev := mountDevice([]rune{firstChar, i})
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possibleDevices[dev] = 3
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}
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}
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possibleDevices["bd"] = 0
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return possibleDevices
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}
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func TestDeviceAllocatorError(t *testing.T) {
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allocator := NewDeviceAllocator().(*deviceAllocator)
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existingDevices := ExistingDevices{}
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// make all devices used
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var first, second byte
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for first = 'b'; first <= 'c'; first++ {
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for second = 'a'; second <= 'z'; second++ {
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device := [2]byte{first, second}
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existingDevices[mountDevice(device[:])] = "used"
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}
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}
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device, err := allocator.GetNext(existingDevices)
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if err == nil {
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t.Errorf("expected error, got device %q", device)
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}
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}
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