test: add ut

pkg/nfs/utils_test.go

@@ -301,3 +301,49 @@ func TestSetKeyValueInMap(t *testing.T) {
 		}
 	}
 }
+
+func TestValidateOnDeleteValue(t *testing.T) {
+	tests := []struct {
+		desc     string
+		onDelete string
+		expected error
+	}{
+		{
+			desc:     "empty value",
+			onDelete: "",
+			expected: nil,
+		},
+		{
+			desc:     "delete value",
+			onDelete: "delete",
+			expected: nil,
+		},
+		{
+			desc:     "retain value",
+			onDelete: "retain",
+			expected: nil,
+		},
+		{
+			desc:     "Retain value",
+			onDelete: "Retain",
+			expected: nil,
+		},
+		{
+			desc:     "Delete value",
+			onDelete: "Delete",
+			expected: nil,
+		},
+		{
+			desc:     "invalid value",
+			onDelete: "invalid",
+			expected: fmt.Errorf("invalid value %s for OnDelete, supported values are %v", "invalid", supportedOnDeleteValues),
+		},
+	}
+
+	for _, test := range tests {
+		result := validateOnDeleteValue(test.onDelete)
+		if !reflect.DeepEqual(result, test.expected) {
+			t.Errorf("test[%s]: unexpected output: %v, expected result: %v", test.desc, result, test.expected)
+		}
+	}
+}