From 38b4d2f5386835200c9296e580a3a1fea1f6762f Mon Sep 17 00:00:00 2001
From: xiaoluoHe <sevnape@outlook.com>
Date: Tue, 20 Aug 2024 13:53:48 +0800
Subject: [PATCH] test: add unit test case

---
 .../vutils/__tests__/common/merge.test.ts     | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/packages/vutils/__tests__/common/merge.test.ts b/packages/vutils/__tests__/common/merge.test.ts
index f4a8b9f..c4be6ef 100644
--- a/packages/vutils/__tests__/common/merge.test.ts
+++ b/packages/vutils/__tests__/common/merge.test.ts
@@ -53,6 +53,29 @@ describe('merge', () => {
       }
     });
 
+    expect(result).toEqual(expected);
+  });
+  it('null value in target should not throw error', function () {
+    const target: any = {
+      style: {
+        stroke: null
+      }
+    };
+
+    const source = {
+      style: {
+        stroke: { type: 'palette', key: 'color1' }
+      }
+    };
+
+    const expected = {
+      style: {
+        stroke: { type: 'palette', key: 'color1' }
+      }
+    };
+
+    const result = merge(target, source);
+
     expect(result).toEqual(expected);
   });
 });