add unit test

Author: tmacro

tests/unit/s3middleware/tagging.spec.js

@@ -68,6 +68,14 @@ describe('areTagsValid', () => {
         assert.strictEqual(result, false);
     });
 
+    it('should return true for tags with empty Value', () => {
+        const validTags = [
+            { Key: 'key1', Value: '' }
+        ];
+        const result = areTagsValid(validTags);
+        assert.strictEqual(result, true);
+    });
+
     it('should return false for tags with duplicate keys', () => {
         const invalidTags = [
             { Key: 'key1', Value: 'value1' },