diff --git a/designer-base/src/main/java/com/fr/design/data/MapCompareUtils.java b/designer-base/src/main/java/com/fr/design/data/MapCompareUtils.java
index 0d7bc6b44..f7492aefc 100644
--- a/designer-base/src/main/java/com/fr/design/data/MapCompareUtils.java
+++ b/designer-base/src/main/java/com/fr/design/data/MapCompareUtils.java
@@ -1,5 +1,7 @@
 package com.fr.design.data;
 
+import org.jetbrains.annotations.NotNull;
+
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -20,7 +22,7 @@ public final class MapCompareUtils {
      * @param <K>          K
      * @param <V>          V
      */
-    public static <K, V> void contrastMapEntries(Map<K, V> orig, Map<K, V> other, EventHandler<K, V> eventHandler) {
+    public static <K, V> void contrastMapEntries(@NotNull Map<K, V> orig, @NotNull Map<K, V> other, @NotNull EventHandler<K, V> eventHandler) {
 
         Map<K, V> copiedOrig = new LinkedHashMap<>(orig);
 
diff --git a/designer-base/src/test/java/com/fr/design/data/MapCompareUtilsTest.java b/designer-base/src/test/java/com/fr/design/data/MapCompareUtilsTest.java
new file mode 100644
index 000000000..1f1e60e2b
--- /dev/null
+++ b/designer-base/src/test/java/com/fr/design/data/MapCompareUtilsTest.java
@@ -0,0 +1,57 @@
+package com.fr.design.data;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * @author rinoux
+ * @version 10.0
+ * Created by rinoux on 2022/3/28
+ */
+public class MapCompareUtilsTest {
+
+    @Test
+    public void contrastMapEntries() {
+
+
+        Map<String, String> orig = new LinkedHashMap<>();
+
+        orig.put("aaa", "aaa");
+        orig.put("bbb", "bbb");
+        orig.put("ccc", "ccc");
+        orig.put("ddd", "ddd");
+
+
+        Map<String, String> other = new LinkedHashMap<>();
+
+        other.put("aaa", "111");
+        other.put("bbb", "bbb");
+        other.put("ccc", "ccc");
+        other.put("eee", "eee");
+
+
+        MapCompareUtils.contrastMapEntries(orig, other, new MapCompareUtils.EventHandler<String, String>() {
+            @Override
+            public void on(MapCompareUtils.EntryEventKind entryEventKind, String s, String s2) {
+                switch (entryEventKind) {
+                    case UPDATED:
+                        Assert.assertEquals(s, "aaa");
+                        Assert.assertEquals(s2, "111");
+                        break;
+                    case REMOVED:
+                        Assert.assertEquals(s, "ddd");
+                        break;
+                    case ADDED:
+                        Assert.assertEquals(s, "eee");
+                        Assert.assertEquals(s2, "eee");
+                        break;
+                    default:
+                        Assert.fail();
+                }
+            }
+        });
+    }
+}
\ No newline at end of file