add validation ut

pkg/framework/plugins/removepodsviolatinginterpodantiaffinity/validation_test.go

@@ -0,0 +1,68 @@
+package removepodsviolatinginterpodantiaffinity
+
+import (
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/descheduler/pkg/api"
+)
+
+func TestValidateRemovePodsViolatingInterPodAntiAffinityArgs(t *testing.T) {
+	testCases := []struct {
+		description string
+		args        *RemovePodsViolatingInterPodAntiAffinityArgs
+		expectError bool
+	}{
+		{
+			description: "valid namespace args, no errors",
+			args: &RemovePodsViolatingInterPodAntiAffinityArgs{
+				Namespaces: &api.Namespaces{
+					Include: []string{"default"},
+				},
+			},
+			expectError: false,
+		},
+		{
+			description: "invalid namespaces args, expects error",
+			args: &RemovePodsViolatingInterPodAntiAffinityArgs{
+				Namespaces: &api.Namespaces{
+					Include: []string{"default"},
+					Exclude: []string{"kube-system"},
+				},
+			},
+			expectError: true,
+		},
+		{
+			description: "valid label selector args, no errors",
+			args: &RemovePodsViolatingInterPodAntiAffinityArgs{
+				LabelSelector: &metav1.LabelSelector{
+					MatchLabels: map[string]string{"role.kubernetes.io/node": ""},
+				},
+			},
+			expectError: false,
+		},
+		{
+			description: "invalid label selector args, expects errors",
+			args: &RemovePodsViolatingInterPodAntiAffinityArgs{
+				LabelSelector: &metav1.LabelSelector{
+					MatchExpressions: []metav1.LabelSelectorRequirement{
+						{
+							Operator: metav1.LabelSelectorOpIn,
+						},
+					},
+				},
+			},
+			expectError: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.description, func(t *testing.T) {
+			err := ValidateRemovePodsViolatingInterPodAntiAffinityArgs(tc.args)
+			hasError := err != nil
+			if tc.expectError != hasError {
+				t.Error("unexpected arg validation behavior")
+			}
+		})
+	}
+}