mirror of
https://github.com/k3s-io/kubernetes.git
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104 lines
2.2 KiB
Go
104 lines
2.2 KiB
Go
/*
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Copyright 2019 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 metrics
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import (
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"sync"
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"sync/atomic"
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"testing"
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)
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var _ MetricRecorder = &fakePodsRecorder{}
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type fakePodsRecorder struct {
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counter int64
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}
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func (r *fakePodsRecorder) Inc() {
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atomic.AddInt64(&r.counter, 1)
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}
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func (r *fakePodsRecorder) Dec() {
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atomic.AddInt64(&r.counter, -1)
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}
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func (r *fakePodsRecorder) Clear() {
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atomic.StoreInt64(&r.counter, 0)
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}
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func TestInc(t *testing.T) {
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fakeRecorder := fakePodsRecorder{}
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var wg sync.WaitGroup
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loops := 100
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wg.Add(loops)
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for i := 0; i < loops; i++ {
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go func() {
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fakeRecorder.Inc()
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wg.Done()
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}()
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}
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wg.Wait()
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if fakeRecorder.counter != int64(loops) {
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t.Errorf("Expected %v, got %v", loops, fakeRecorder.counter)
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}
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}
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func TestDec(t *testing.T) {
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fakeRecorder := fakePodsRecorder{counter: 100}
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var wg sync.WaitGroup
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loops := 100
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wg.Add(loops)
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for i := 0; i < loops; i++ {
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go func() {
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fakeRecorder.Dec()
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wg.Done()
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}()
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}
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wg.Wait()
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if fakeRecorder.counter != int64(0) {
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t.Errorf("Expected %v, got %v", loops, fakeRecorder.counter)
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}
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}
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func TestClear(t *testing.T) {
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fakeRecorder := fakePodsRecorder{}
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var wg sync.WaitGroup
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incLoops, decLoops := 100, 80
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wg.Add(incLoops + decLoops)
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for i := 0; i < incLoops; i++ {
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go func() {
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fakeRecorder.Inc()
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wg.Done()
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}()
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}
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for i := 0; i < decLoops; i++ {
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go func() {
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fakeRecorder.Dec()
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wg.Done()
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}()
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}
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wg.Wait()
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if fakeRecorder.counter != int64(incLoops-decLoops) {
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t.Errorf("Expected %v, got %v", incLoops-decLoops, fakeRecorder.counter)
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}
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// verify Clear() works
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fakeRecorder.Clear()
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if fakeRecorder.counter != int64(0) {
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t.Errorf("Expected %v, got %v", 0, fakeRecorder.counter)
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}
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}
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