129 lines
3.5 KiB
Go
129 lines
3.5 KiB
Go
/*
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Copyright 2020 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 resourcequota
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import (
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"reflect"
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"testing"
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"time"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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lru "github.com/hashicorp/golang-lru"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes/fake"
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)
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func TestLRUCacheLookup(t *testing.T) {
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namespace := "foo"
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resourceQuota := &corev1.ResourceQuota{
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ObjectMeta: metav1.ObjectMeta{
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Name: "foo",
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Namespace: namespace,
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},
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}
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testcases := []struct {
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description string
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cacheInput []*corev1.ResourceQuota
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clientInput []runtime.Object
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ttl time.Duration
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namespace string
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expectedQuota *corev1.ResourceQuota
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}{
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{
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description: "object is found via cache",
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cacheInput: []*corev1.ResourceQuota{resourceQuota},
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ttl: 30 * time.Second,
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namespace: namespace,
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expectedQuota: resourceQuota,
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},
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{
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description: "object is outdated and not found with client",
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cacheInput: []*corev1.ResourceQuota{resourceQuota},
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ttl: -30 * time.Second,
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namespace: namespace,
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expectedQuota: nil,
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},
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{
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description: "object is outdated but is found with client",
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cacheInput: []*corev1.ResourceQuota{resourceQuota},
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clientInput: []runtime.Object{resourceQuota},
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ttl: -30 * time.Second,
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namespace: namespace,
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expectedQuota: resourceQuota,
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},
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{
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description: "object does not exist in cache and is not found with client",
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cacheInput: []*corev1.ResourceQuota{resourceQuota},
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ttl: 30 * time.Second,
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expectedQuota: nil,
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},
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{
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description: "object does not exist in cache and is found with client",
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cacheInput: []*corev1.ResourceQuota{},
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clientInput: []runtime.Object{resourceQuota},
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namespace: namespace,
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expectedQuota: resourceQuota,
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},
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}
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for _, tc := range testcases {
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t.Run(tc.description, func(t *testing.T) {
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liveLookupCache, err := lru.New(1)
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if err != nil {
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t.Fatal(err)
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}
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kubeClient := fake.NewSimpleClientset(tc.clientInput...)
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informerFactory := informers.NewSharedInformerFactory(kubeClient, 0)
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accessor, _ := newQuotaAccessor()
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accessor.client = kubeClient
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accessor.lister = informerFactory.Core().V1().ResourceQuotas().Lister()
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accessor.liveLookupCache = liveLookupCache
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for _, q := range tc.cacheInput {
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quota := q
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liveLookupCache.Add(quota.Namespace, liveLookupEntry{expiry: time.Now().Add(tc.ttl), items: []*corev1.ResourceQuota{quota}})
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}
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quotas, err := accessor.GetQuotas(tc.namespace)
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if err != nil {
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t.Errorf("Unexpected error: %v", err)
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}
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if tc.expectedQuota != nil {
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if count := len(quotas); count != 1 {
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t.Fatalf("Expected 1 object but got %d", count)
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}
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if !reflect.DeepEqual(quotas[0], *tc.expectedQuota) {
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t.Errorf("Retrieved object does not match")
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}
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return
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}
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if count := len(quotas); count > 0 {
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t.Errorf("Expected 0 objects but got %d", count)
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}
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})
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}
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}
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