test: 增加单元测试

Author: ArgoZhang

test/UnitTest/Components/DisplayTest.cs

@@ -59,6 +59,14 @@ public async Task LookupService_Ok()
         });
         await Task.Delay(20);
         Assert.Contains("Test1,Test2", cut.Markup);
+
+        cut.SetParametersAndRender(pb =>
+        {
+            pb.Add(a => a.LookupServiceKey, null);
+            pb.Add(a => a.Lookup, new List<SelectedItem> { new("v1", "Test3"), new("v2", "Test4") });
+        });
+        await Task.Delay(20);
+        Assert.Contains("Test3,Test4", cut.Markup);
     }
 
     [Fact]