/* Copyright 2018 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 polymorphichelpers import ( "fmt" "sort" "testing" "time" corev1 "k8s.io/api/core/v1" apiequality "k8s.io/apimachinery/pkg/api/equality" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/apimachinery/pkg/labels" "k8s.io/apimachinery/pkg/watch" fakeexternal "k8s.io/client-go/kubernetes/fake" testcore "k8s.io/client-go/testing" "k8s.io/kubernetes/pkg/kubectl/util/podutils" ) func TestGetFirstPod(t *testing.T) { labelSet := map[string]string{"test": "selector"} tests := []struct { name string podList *corev1.PodList watching []watch.Event sortBy func([]*corev1.Pod) sort.Interface expected *corev1.Pod expectedNum int expectedErr bool }{ { name: "kubectl logs - two ready pods", podList: newPodList(2, -1, -1, labelSet), sortBy: func(pods []*corev1.Pod) sort.Interface { return podutils.ByLogging(pods) }, expected: &corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: "pod-1", Namespace: metav1.NamespaceDefault, CreationTimestamp: metav1.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC), Labels: map[string]string{"test": "selector"}, }, Status: corev1.PodStatus{ Conditions: []corev1.PodCondition{ { Status: corev1.ConditionTrue, Type: corev1.PodReady, }, }, }, }, expectedNum: 2, }, { name: "kubectl logs - one unhealthy, one healthy", podList: newPodList(2, -1, 1, labelSet), sortBy: func(pods []*corev1.Pod) sort.Interface { return podutils.ByLogging(pods) }, expected: &corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: "pod-2", Namespace: metav1.NamespaceDefault, CreationTimestamp: metav1.Date(2016, time.April, 1, 1, 0, 1, 0, time.UTC), Labels: map[string]string{"test": "selector"}, }, Status: corev1.PodStatus{ Conditions: []corev1.PodCondition{ { Status: corev1.ConditionTrue, Type: corev1.PodReady, }, }, ContainerStatuses: []corev1.ContainerStatus{{RestartCount: 5}}, }, }, expectedNum: 2, }, { name: "kubectl attach - two ready pods", podList: newPodList(2, -1, -1, labelSet), sortBy: func(pods []*corev1.Pod) sort.Interface { return sort.Reverse(podutils.ActivePods(pods)) }, expected: &corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: "pod-1", Namespace: metav1.NamespaceDefault, CreationTimestamp: metav1.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC), Labels: map[string]string{"test": "selector"}, }, Status: corev1.PodStatus{ Conditions: []corev1.PodCondition{ { Status: corev1.ConditionTrue, Type: corev1.PodReady, }, }, }, }, expectedNum: 2, }, { name: "kubectl attach - wait for ready pod", podList: newPodList(1, 1, -1, labelSet), watching: []watch.Event{ { Type: watch.Modified, Object: &corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: "pod-1", Namespace: metav1.NamespaceDefault, CreationTimestamp: metav1.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC), Labels: map[string]string{"test": "selector"}, }, Status: corev1.PodStatus{ Conditions: []corev1.PodCondition{ { Status: corev1.ConditionTrue, Type: corev1.PodReady, }, }, }, }, }, }, sortBy: func(pods []*corev1.Pod) sort.Interface { return sort.Reverse(podutils.ActivePods(pods)) }, expected: &corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: "pod-1", Namespace: metav1.NamespaceDefault, CreationTimestamp: metav1.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC), Labels: map[string]string{"test": "selector"}, }, Status: corev1.PodStatus{ Conditions: []corev1.PodCondition{ { Status: corev1.ConditionTrue, Type: corev1.PodReady, }, }, }, }, expectedNum: 1, }, } for i := range tests { test := tests[i] fake := fakeexternal.NewSimpleClientset(test.podList) if len(test.watching) > 0 { watcher := watch.NewFake() for _, event := range test.watching { switch event.Type { case watch.Added: go watcher.Add(event.Object) case watch.Modified: go watcher.Modify(event.Object) } } fake.PrependWatchReactor("pods", testcore.DefaultWatchReactor(watcher, nil)) } selector := labels.Set(labelSet).AsSelector() pod, numPods, err := GetFirstPod(fake.CoreV1(), metav1.NamespaceDefault, selector.String(), 1*time.Minute, test.sortBy) pod.Spec.SecurityContext = nil if !test.expectedErr && err != nil { t.Errorf("%s: unexpected error: %v", test.name, err) continue } if test.expectedErr && err == nil { t.Errorf("%s: expected an error", test.name) continue } if test.expectedNum != numPods { t.Errorf("%s: expected %d pods, got %d", test.name, test.expectedNum, numPods) continue } if !apiequality.Semantic.DeepEqual(test.expected, pod) { t.Errorf("%s:\nexpected pod:\n%#v\ngot:\n%#v\n\n", test.name, test.expected, pod) } } } func newPodList(count, isUnready, isUnhealthy int, labels map[string]string) *corev1.PodList { pods := []corev1.Pod{} for i := 0; i < count; i++ { newPod := corev1.Pod{ ObjectMeta: metav1.ObjectMeta{ Name: fmt.Sprintf("pod-%d", i+1), Namespace: metav1.NamespaceDefault, CreationTimestamp: metav1.Date(2016, time.April, 1, 1, 0, i, 0, time.UTC), Labels: labels, }, Status: corev1.PodStatus{ Conditions: []corev1.PodCondition{ { Status: corev1.ConditionTrue, Type: corev1.PodReady, }, }, }, } pods = append(pods, newPod) } if isUnready > -1 && isUnready < count { pods[isUnready].Status.Conditions[0].Status = corev1.ConditionFalse } if isUnhealthy > -1 && isUnhealthy < count { pods[isUnhealthy].Status.ContainerStatuses = []corev1.ContainerStatus{{RestartCount: 5}} } return &corev1.PodList{ Items: pods, } }