test: 增加 OnClose 单元测试

Author: ArgoZhang

test/UnitTest/Components/TableTest.cs

@@ -2406,6 +2406,10 @@ public async Task CustomerToolbarPopConfirmButton_Ok()
         Assert.True(clickCallback);
         Assert.True(clicked);
         Assert.True(confirmCallback);
+
+        clicked = false;
+        await cut.InvokeAsync(() => button.Instance.TriggerCloseCallback());
+        Assert.True(clicked);
     }
 
     [Fact]