kubernetes device_allocator_test 源码
kubernetes device_allocator_test 代码
文件路径：/staging/src/k8s.io/legacy-cloud-providers/aws/device_allocator_test.go
//go:build !providerless
// +build !providerless
/*
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)
}
}
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