diff --git a/pkg/webhook/util/convertor/util_test.go b/pkg/webhook/util/convertor/util_test.go
new file mode 100644
index 0000000000..859f5592b5
--- /dev/null
+++ b/pkg/webhook/util/convertor/util_test.go
@@ -0,0 +1,130 @@
+/*
+Copyright 2020 The Kruise 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 convertor
+
+import (
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
+)
+
+func TestConvertPodTemplateSpec(t *testing.T) {
+	template := &v1.PodTemplateSpec{
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{{
+				Name:  "nginx",
+				Image: "nginx:latest",
+			}},
+		},
+	}
+	converted, err := ConvertPodTemplateSpec(template)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if len(converted.Spec.Containers) != 1 || converted.Spec.Containers[0].Name != "nginx" {
+		t.Errorf("Conversion failed, got %+v", converted)
+	}
+}
+
+func TestConvertPod(t *testing.T) {
+	pod := &v1.Pod{
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{{
+				Name:  "test",
+				Image: "busybox",
+			}},
+		},
+	}
+	result, err := ConvertPod(pod)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if len(result.Spec.Containers) != 1 || result.Spec.Containers[0].Name != "test" {
+		t.Errorf("Unexpected result: %+v", result)
+	}
+}
+
+func TestConvertCoreVolumes(t *testing.T) {
+	vols := []v1.Volume{{
+		Name: "data",
+		VolumeSource: v1.VolumeSource{
+			EmptyDir: &v1.EmptyDirVolumeSource{},
+		},
+	}}
+	coreVols, err := ConvertCoreVolumes(vols)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if len(coreVols) != 1 || coreVols[0].Name != "data" {
+		t.Errorf("Unexpected result: %+v", coreVols)
+	}
+}
+
+func TestConvertEphemeralContainer(t *testing.T) {
+	ec := []v1.EphemeralContainer{{
+		EphemeralContainerCommon: v1.EphemeralContainerCommon{
+			Name:  "debugger",
+			Image: "busybox",
+		},
+	}}
+	coreEC, err := ConvertEphemeralContainer(ec)
+	if err != nil {
+		t.Fatalf("Expected no error, got %v", err)
+	}
+	if len(coreEC) != 1 || coreEC[0].Name != "debugger" {
+		t.Errorf("Unexpected result: %+v", coreEC)
+	}
+}
+
+func TestGetPercentValue(t *testing.T) {
+	tests := []struct {
+		input    intstr.IntOrString
+		expected int
+		ok       bool
+	}{
+		{intstr.FromString("50%"), 50, true},
+		{intstr.FromString("100%"), 100, true},
+		{intstr.FromString("100"), 0, false},
+		{intstr.FromInt(30), 0, false},
+		{intstr.FromString("abc%"), 0, false},
+	}
+
+	for _, test := range tests {
+		val, ok := GetPercentValue(test.input)
+		if val != test.expected || ok != test.ok {
+			t.Errorf("input: %v, expected (%d, %v), got (%d, %v)", test.input, test.expected, test.ok, val, ok)
+		}
+	}
+}
+
+func TestGetIntOrPercentValue(t *testing.T) {
+	tests := []struct {
+		input    intstr.IntOrString
+		expected int
+	}{
+		{intstr.FromString("40%"), 40},
+		{intstr.FromInt(60), 60},
+	}
+
+	for _, test := range tests {
+		result := GetIntOrPercentValue(test.input)
+		if result != test.expected {
+			t.Errorf("input: %v, expected: %d, got: %d", test.input, test.expected, result)
+		}
+	}
+}