Fix a bug in e2epod function

test/e2e/framework/pod/BUILD

@@ -1,4 +1,4 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
@@ -47,3 +47,15 @@ filegroup(
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )
+
+go_test(
+    name = "go_default_test",
+    srcs = ["resource_test.go"],
+    embed = [":go_default_library"],
+    deps = [
+        "//staging/src/k8s.io/api/core/v1:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
+        "//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",
+    ],
+)

test/e2e/framework/pod/resource.go

@@ -533,8 +533,9 @@ func GetPodsInNamespace(c clientset.Interface, ns string, ignoreLabels map[strin
 		return []*v1.Pod{}, err
 	}
 	ignoreSelector := labels.SelectorFromSet(ignoreLabels)
-	filtered := []*v1.Pod{}
-	for _, p := range pods.Items {
+	var filtered []*v1.Pod
+	for i := range pods.Items {
+		p := pods.Items[i]
 		if len(ignoreLabels) != 0 && ignoreSelector.Matches(labels.Set(p.Labels)) {
 			continue
 		}

test/e2e/framework/pod/resource_test.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2020 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 pod
+
+import (
+	"reflect"
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	fakeclient "k8s.io/client-go/kubernetes/fake"
+)
+
+func TestGetPodsInNamespace(t *testing.T) {
+	tests := []struct {
+		name      string
+		pods      []runtime.Object
+		wantPods  []*v1.Pod
+		expectErr bool
+	}{
+		{
+			name: "nil check",
+		},
+		{
+			name: "2 pods",
+			pods: []runtime.Object{
+				&v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "pod1"}},
+				&v1.Pod{ObjectMeta: metav1.ObjectMeta{Name: "pod2"}},
+			},
+			wantPods: []*v1.Pod{
+				{ObjectMeta: metav1.ObjectMeta{Name: "pod1"}},
+				{ObjectMeta: metav1.ObjectMeta{Name: "pod2"}},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cs := fakeclient.NewSimpleClientset(tt.pods...)
+			got, err := GetPodsInNamespace(cs, "", map[string]string{})
+			if (err != nil) != tt.expectErr {
+				t.Errorf("expectErr = %v, but got err = %v", tt.expectErr, err)
+			}
+			if !reflect.DeepEqual(got, tt.wantPods) {
+				t.Errorf("expect %v, got %v", tt.wantPods, got)
+			}
+		})
+	}
+}