configurable data path concurrency: UT

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

pkg/builder/node_builder.go

@@ -41,6 +41,11 @@ func ForNode(name string) *NodeBuilder {
 	}
 }
 
+func (b *NodeBuilder) Labels(labels map[string]string) *NodeBuilder {
+	b.object.Labels = labels
+	return b
+}
+
 // Result returns the built Node.
 func (b *NodeBuilder) Result() *corev1api.Node {
 	return b.object

pkg/builder/pod_builder.go

@@ -101,3 +101,8 @@ func (b *PodBuilder) ContainerStatuses(containerStatuses ...*corev1api.Container
 	}
 	return b
 }
+
+func (b *PodBuilder) Phase(phase corev1api.PodPhase) *PodBuilder {
+	b.object.Status.Phase = phase
+	return b
+}

pkg/cmd/cli/nodeagent/server.go

@@ -226,7 +226,7 @@ func newNodeAgentServer(logger logrus.FieldLogger, factory client.Factory, confi
 		return nil, err
 	}
 
-	dataPathConcurrentNum := s.getDataPathConcurrentNum(defaultDataPathConcurrentNum, s.logger)
+	dataPathConcurrentNum := s.getDataPathConcurrentNum(defaultDataPathConcurrentNum)
 	s.dataPathMgr = datapath.NewManager(dataPathConcurrentNum)
 
 	return s, nil
@@ -489,28 +489,34 @@ func (s *nodeAgentServer) markInProgressPVRsFailed(client ctrlclient.Client) {
 	}
 }
 
-func (s *nodeAgentServer) getDataPathConcurrentNum(defaultNum int, logger logrus.FieldLogger) int {
-	configs, err := nodeagent.GetConfigs(s.ctx, s.namespace, s.kubeClient)
+var getConfigsFunc = nodeagent.GetConfigs
+
+func (s *nodeAgentServer) getDataPathConcurrentNum(defaultNum int) int {
+	configs, err := getConfigsFunc(s.ctx, s.namespace, s.kubeClient)
 	if err != nil {
-		logger.WithError(err).Warn("Failed to get node agent configs")
+		s.logger.WithError(err).Warn("Failed to get node agent configs")
 		return defaultNum
 	}
 
 	if configs == nil || configs.DataPathConcurrency == nil {
-		logger.Infof("Node agent configs are not found, use the default number %v", defaultNum)
+		s.logger.Infof("Node agent configs are not found, use the default number %v", defaultNum)
 		return defaultNum
 	}
 
 	globalNum := configs.DataPathConcurrency.GlobalConfig
 
 	if globalNum <= 0 {
-		logger.Warnf("Global number %v is invalid, use the default value %v", globalNum, defaultNum)
+		s.logger.Warnf("Global number %v is invalid, use the default value %v", globalNum, defaultNum)
 		globalNum = defaultNum
 	}
 
+	if len(configs.DataPathConcurrency.PerNodeConfig) == 0 {
+		return globalNum
+	}
+
 	curNode, err := s.kubeClient.CoreV1().Nodes().Get(s.ctx, s.nodeName, metav1.GetOptions{})
 	if err != nil {
-		logger.WithError(err).Warnf("Failed to get node info for %s, use the global number %v", s.nodeName, globalNum)
+		s.logger.WithError(err).Warnf("Failed to get node info for %s, use the global number %v", s.nodeName, globalNum)
 		return globalNum
 	}
 
@@ -519,12 +525,12 @@ func (s *nodeAgentServer) getDataPathConcurrentNum(defaultNum int, logger logrus
 	for _, rule := range configs.DataPathConcurrency.PerNodeConfig {
 		selector, err := metav1.LabelSelectorAsSelector(&rule.NodeSelector)
 		if err != nil {
-			logger.WithError(err).Warnf("Failed to parse rule with label selector %s, skip it", rule.NodeSelector.String())
+			s.logger.WithError(err).Warnf("Failed to parse rule with label selector %s, skip it", rule.NodeSelector.String())
 			continue
 		}
 
 		if rule.Number <= 0 {
-			logger.Warnf("Rule with label selector %s is with an invalid number %v, skip it", rule.NodeSelector.String(), rule.Number)
+			s.logger.Warnf("Rule with label selector %s is with an invalid number %v, skip it", rule.NodeSelector.String(), rule.Number)
 			continue
 		}
 
@@ -536,10 +542,10 @@ func (s *nodeAgentServer) getDataPathConcurrentNum(defaultNum int, logger logrus
 	}
 
 	if concurrentNum == math.MaxInt32 {
-		logger.Infof("Per node number for node %s is not found, use the global number %v", s.nodeName, globalNum)
+		s.logger.Infof("Per node number for node %s is not found, use the global number %v", s.nodeName, globalNum)
 		concurrentNum = globalNum
 	} else {
-		logger.Infof("Use the per node number %v over global number %v for node %s", concurrentNum, globalNum, s.nodeName)
+		s.logger.Infof("Use the per node number %v over global number %v for node %s", concurrentNum, globalNum, s.nodeName)
 	}
 
 	return concurrentNum

pkg/cmd/cli/nodeagent/server_test.go

@@ -17,16 +17,22 @@ package nodeagent
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/fake"
 
 	"github.com/vmware-tanzu/velero/pkg/builder"
+	"github.com/vmware-tanzu/velero/pkg/nodeagent"
 	testutil "github.com/vmware-tanzu/velero/pkg/test"
 )
 
@@ -107,3 +113,259 @@ func Test_validatePodVolumesHostPath(t *testing.T) {
 		})
 	}
 }
+
+func Test_getDataPathConcurrentNum(t *testing.T) {
+	defaultNum := 100001
+	globalNum := 6
+	nodeName := "node-agent-node"
+	node1 := builder.ForNode("node-agent-node").Result()
+	node2 := builder.ForNode("node-agent-node").Labels(map[string]string{
+		"host-name": "node-1",
+		"xxxx":      "yyyyy",
+	}).Result()
+
+	invalidLabelSelector := metav1.LabelSelector{
+		MatchLabels: map[string]string{
+			"inva/lid": "inva/lid",
+		},
+	}
+	validLabelSelector1 := metav1.LabelSelector{
+		MatchLabels: map[string]string{
+			"host-name": "node-1",
+		},
+	}
+	validLabelSelector2 := metav1.LabelSelector{
+		MatchLabels: map[string]string{
+			"xxxx": "yyyyy",
+		},
+	}
+
+	tests := []struct {
+		name          string
+		getFunc       func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error)
+		setKubeClient bool
+		kubeClientObj []runtime.Object
+		expectNum     int
+		expectLog     string
+	}{
+		{
+			name: "failed to get configs",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return nil, errors.New("fake-get-error")
+			},
+			expectLog: "Failed to get node agent configs",
+			expectNum: defaultNum,
+		},
+		{
+			name: "configs cm not found",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return nil, nil
+			},
+			expectLog: fmt.Sprintf("Node agent configs are not found, use the default number %v", defaultNum),
+			expectNum: defaultNum,
+		},
+		{
+			name: "configs cm's data path concurrency is nil",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{}, nil
+			},
+			expectLog: fmt.Sprintf("Node agent configs are not found, use the default number %v", defaultNum),
+			expectNum: defaultNum,
+		},
+		{
+			name: "global number is invalid",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: -1,
+					},
+				}, nil
+			},
+			expectLog: fmt.Sprintf("Global number %v is invalid, use the default value %v", -1, defaultNum),
+			expectNum: defaultNum,
+		},
+		{
+			name: "global number is valid",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+					},
+				}, nil
+			},
+			expectNum: globalNum,
+		},
+		{
+			name: "node is not found",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								Number: 100,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			expectLog:     fmt.Sprintf("Failed to get node info for %s, use the global number %v", nodeName, globalNum),
+			expectNum:     globalNum,
+		},
+		{
+			name: "failed to get selector",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								NodeSelector: invalidLabelSelector,
+								Number:       100,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			kubeClientObj: []runtime.Object{node1},
+			expectLog:     fmt.Sprintf("Failed to parse rule with label selector %s, skip it", invalidLabelSelector.String()),
+			expectNum:     globalNum,
+		},
+		{
+			name: "rule number is invalid",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								NodeSelector: validLabelSelector1,
+								Number:       -1,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			kubeClientObj: []runtime.Object{node1},
+			expectLog:     fmt.Sprintf("Rule with label selector %s is with an invalid number %v, skip it", validLabelSelector1.String(), -1),
+			expectNum:     globalNum,
+		},
+		{
+			name: "label doesn't match",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								NodeSelector: validLabelSelector1,
+								Number:       -1,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			kubeClientObj: []runtime.Object{node1},
+			expectLog:     fmt.Sprintf("Per node number for node %s is not found, use the global number %v", nodeName, globalNum),
+			expectNum:     globalNum,
+		},
+		{
+			name: "match one rule",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								NodeSelector: validLabelSelector1,
+								Number:       66,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			kubeClientObj: []runtime.Object{node2},
+			expectLog:     fmt.Sprintf("Use the per node number %v over global number %v for node %s", 66, globalNum, nodeName),
+			expectNum:     66,
+		},
+		{
+			name: "match multiple rules",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								NodeSelector: validLabelSelector1,
+								Number:       66,
+							},
+							{
+								NodeSelector: validLabelSelector2,
+								Number:       36,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			kubeClientObj: []runtime.Object{node2},
+			expectLog:     fmt.Sprintf("Use the per node number %v over global number %v for node %s", 36, globalNum, nodeName),
+			expectNum:     36,
+		},
+		{
+			name: "match multiple rules 2",
+			getFunc: func(context.Context, string, kubernetes.Interface) (*nodeagent.Configs, error) {
+				return &nodeagent.Configs{
+					DataPathConcurrency: &nodeagent.DataPathConcurrency{
+						GlobalConfig: globalNum,
+						PerNodeConfig: []nodeagent.RuledConfigs{
+							{
+								NodeSelector: validLabelSelector1,
+								Number:       36,
+							},
+							{
+								NodeSelector: validLabelSelector2,
+								Number:       66,
+							},
+						},
+					},
+				}, nil
+			},
+			setKubeClient: true,
+			kubeClientObj: []runtime.Object{node2},
+			expectLog:     fmt.Sprintf("Use the per node number %v over global number %v for node %s", 36, globalNum, nodeName),
+			expectNum:     36,
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fakeKubeClient := fake.NewSimpleClientset(test.kubeClientObj...)
+
+			logBuffer := ""
+
+			s := &nodeAgentServer{
+				nodeName: nodeName,
+				logger:   testutil.NewSingleLogger(&logBuffer),
+			}
+
+			if test.setKubeClient {
+				s.kubeClient = fakeKubeClient
+			}
+
+			getConfigsFunc = test.getFunc
+
+			num := s.getDataPathConcurrentNum(defaultNum)
+			assert.Equal(t, test.expectNum, num)
+			if test.expectLog == "" {
+				assert.Equal(t, "", logBuffer)
+			} else {
+				assert.True(t, strings.Contains(logBuffer, test.expectLog))
+			}
+		})
+	}
+}

pkg/nodeagent/node_agent_test.go

@@ -0,0 +1,332 @@
+/*
+Copyright The Velero Contributors.
+
+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 nodeagent
+
+import (
+	"context"
+	"testing"
+
+	"github.com/pkg/errors"
+	"github.com/stretchr/testify/assert"
+	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes/fake"
+	clientTesting "k8s.io/client-go/testing"
+	clientFake "sigs.k8s.io/controller-runtime/pkg/client/fake"
+
+	"github.com/vmware-tanzu/velero/pkg/builder"
+)
+
+type reactor struct {
+	verb        string
+	resource    string
+	reactorFunc clientTesting.ReactionFunc
+}
+
+func TestIsRunning(t *testing.T) {
+	daemonSet := &appsv1.DaemonSet{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: "fake-ns",
+			Name:      "node-agent",
+		},
+		TypeMeta: metav1.TypeMeta{
+			Kind: "DaemonSet",
+		},
+	}
+
+	tests := []struct {
+		name          string
+		kubeClientObj []runtime.Object
+		namespace     string
+		kubeReactors  []reactor
+		expectErr     string
+	}{
+		{
+			name:      "ds is not found",
+			namespace: "fake-ns",
+			expectErr: "daemonset not found",
+		},
+		{
+			name:      "ds get error",
+			namespace: "fake-ns",
+			kubeReactors: []reactor{
+				{
+					verb:     "get",
+					resource: "daemonsets",
+					reactorFunc: func(action clientTesting.Action) (handled bool, ret runtime.Object, err error) {
+						return true, nil, errors.New("fake-get-error")
+					},
+				},
+			},
+			expectErr: "fake-get-error",
+		},
+		{
+			name:      "succeed",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				daemonSet,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fakeKubeClient := fake.NewSimpleClientset(test.kubeClientObj...)
+
+			for _, reactor := range test.kubeReactors {
+				fakeKubeClient.Fake.PrependReactor(reactor.verb, reactor.resource, reactor.reactorFunc)
+			}
+
+			err := IsRunning(context.TODO(), fakeKubeClient, test.namespace)
+			if test.expectErr == "" {
+				assert.NoError(t, err)
+			} else {
+				assert.EqualError(t, err, test.expectErr)
+			}
+		})
+	}
+}
+
+func TestIsRunningInNode(t *testing.T) {
+	scheme := runtime.NewScheme()
+	corev1.AddToScheme(scheme)
+
+	nonNodeAgentPod := builder.ForPod("fake-ns", "fake-pod").Result()
+	nodeAgentPodNotRunning := builder.ForPod("fake-ns", "fake-pod").Labels(map[string]string{"name": "node-agent"}).Result()
+	nodeAgentPodRunning1 := builder.ForPod("fake-ns", "fake-pod-1").Labels(map[string]string{"name": "node-agent"}).Phase(corev1.PodRunning).Result()
+	nodeAgentPodRunning2 := builder.ForPod("fake-ns", "fake-pod-2").Labels(map[string]string{"name": "node-agent"}).Phase(corev1.PodRunning).Result()
+	nodeAgentPodRunning3 := builder.ForPod("fake-ns", "fake-pod-3").
+		Labels(map[string]string{"name": "node-agent"}).
+		Phase(corev1.PodRunning).
+		NodeName("fake-node").
+		Result()
+
+	tests := []struct {
+		name          string
+		kubeClientObj []runtime.Object
+		nodeName      string
+		expectErr     string
+	}{
+		{
+			name:      "node name is empty",
+			expectErr: "node name is empty",
+		},
+		{
+			name:     "ds pod not found",
+			nodeName: "fake-node",
+			kubeClientObj: []runtime.Object{
+				nonNodeAgentPod,
+			},
+			expectErr: "daemonset pod not found in running state in node fake-node",
+		},
+		{
+			name:     "ds po are not all running",
+			nodeName: "fake-node",
+			kubeClientObj: []runtime.Object{
+				nodeAgentPodNotRunning,
+				nodeAgentPodRunning1,
+			},
+			expectErr: "daemonset pod not found in running state in node fake-node",
+		},
+		{
+			name:     "ds pods wrong node name",
+			nodeName: "fake-node",
+			kubeClientObj: []runtime.Object{
+				nodeAgentPodNotRunning,
+				nodeAgentPodRunning1,
+				nodeAgentPodRunning2,
+			},
+			expectErr: "daemonset pod not found in running state in node fake-node",
+		},
+		{
+			name:     "succeed",
+			nodeName: "fake-node",
+			kubeClientObj: []runtime.Object{
+				nodeAgentPodNotRunning,
+				nodeAgentPodRunning1,
+				nodeAgentPodRunning2,
+				nodeAgentPodRunning3,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fakeClientBuilder := clientFake.NewClientBuilder()
+			fakeClientBuilder = fakeClientBuilder.WithScheme(scheme)
+
+			fakeClient := fakeClientBuilder.WithRuntimeObjects(test.kubeClientObj...).Build()
+
+			err := IsRunningInNode(context.TODO(), "", test.nodeName, fakeClient)
+			if test.expectErr == "" {
+				assert.NoError(t, err)
+			} else {
+				assert.EqualError(t, err, test.expectErr)
+			}
+		})
+	}
+}
+
+func TestGetPodSpec(t *testing.T) {
+	podSpec := corev1.PodSpec{
+		NodeName: "fake-node",
+	}
+
+	daemonSet := &appsv1.DaemonSet{
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace: "fake-ns",
+			Name:      "node-agent",
+		},
+		TypeMeta: metav1.TypeMeta{
+			Kind: "DaemonSet",
+		},
+		Spec: appsv1.DaemonSetSpec{
+			Template: corev1.PodTemplateSpec{
+				Spec: podSpec,
+			},
+		},
+	}
+
+	tests := []struct {
+		name          string
+		kubeClientObj []runtime.Object
+		namespace     string
+		expectErr     string
+		expectSpec    corev1.PodSpec
+	}{
+		{
+			name:      "ds is not found",
+			namespace: "fake-ns",
+			expectErr: "error to get node-agent daemonset: daemonsets.apps \"node-agent\" not found",
+		},
+		{
+			name:      "succeed",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				daemonSet,
+			},
+			expectSpec: podSpec,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fakeKubeClient := fake.NewSimpleClientset(test.kubeClientObj...)
+
+			spec, err := GetPodSpec(context.TODO(), fakeKubeClient, test.namespace)
+			if test.expectErr == "" {
+				assert.NoError(t, err)
+				assert.Equal(t, *spec, test.expectSpec)
+			} else {
+				assert.EqualError(t, err, test.expectErr)
+			}
+		})
+	}
+}
+
+func TestGetConfigs(t *testing.T) {
+	cm := builder.ForConfigMap("fake-ns", "node-agent-configs").Result()
+	cmWithInvalidData := builder.ForConfigMap("fake-ns", "node-agent-configs").Data("fake-key", "fake-value").Result()
+	cmWithInvalidDataFormat := builder.ForConfigMap("fake-ns", "node-agent-configs").Data("data-path-concurrency", "wrong").Result()
+	cmWithValidData := builder.ForConfigMap("fake-ns", "node-agent-configs").Data("data-path-concurrency", "{\"globalConfig\": 5}").Result()
+
+	tests := []struct {
+		name          string
+		kubeClientObj []runtime.Object
+		namespace     string
+		kubeReactors  []reactor
+		expectResult  *DataPathConcurrency
+		expectErr     string
+	}{
+		{
+			name:      "cm is not found",
+			namespace: "fake-ns",
+		},
+		{
+			name:      "cm get error",
+			namespace: "fake-ns",
+			kubeReactors: []reactor{
+				{
+					verb:     "get",
+					resource: "configmaps",
+					reactorFunc: func(action clientTesting.Action) (handled bool, ret runtime.Object, err error) {
+						return true, nil, errors.New("fake-get-error")
+					},
+				},
+			},
+			expectErr: "error to get node agent configs node-agent-configs: fake-get-error",
+		},
+		{
+			name:      "cm's data is nil",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				cm,
+			},
+			expectErr: "data is not available in config map node-agent-configs",
+		},
+		{
+			name:      "cm's data is not found",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				cmWithInvalidData,
+			},
+		},
+		{
+			name:      "cm's data is with invalid format",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				cmWithInvalidDataFormat,
+			},
+			expectErr: "error to unmarshall data path concurrency configs from node-agent-configs: invalid character 'w' looking for beginning of value",
+		},
+		{
+			name:      "success",
+			namespace: "fake-ns",
+			kubeClientObj: []runtime.Object{
+				cmWithValidData,
+			},
+			expectResult: &DataPathConcurrency{
+				GlobalConfig: 5,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			fakeKubeClient := fake.NewSimpleClientset(test.kubeClientObj...)
+
+			for _, reactor := range test.kubeReactors {
+				fakeKubeClient.Fake.PrependReactor(reactor.verb, reactor.resource, reactor.reactorFunc)
+			}
+
+			result, err := GetConfigs(context.TODO(), test.namespace, fakeKubeClient)
+			if test.expectErr == "" {
+				assert.NoError(t, err)
+
+				if test.expectResult == nil {
+					assert.Nil(t, result)
+				} else {
+					assert.Equal(t, *test.expectResult, *result.DataPathConcurrency)
+				}
+			} else {
+				assert.EqualError(t, err, test.expectErr)
+			}
+		})
+	}
+}

pkg/test/test_logger.go

@@ -40,7 +40,7 @@ type singleLogRecorder struct {
 }
 
 func (s *singleLogRecorder) Write(p []byte) (n int, err error) {
-	*s.buffer = string(p[:])
+	*s.buffer = *s.buffer + string(p[:])
 	return len(p), nil
 }