!2372 test(#I4SKQP): add unit test for AutoComplete

* test: 增加 ShowLabel 设置
* refactor: 移除 set 属性

src/BootstrapBlazor/Components/Ajax/AjaxService.cs

@@ -18,7 +18,7 @@ public class AjaxService
     /// <summary>
     /// 获得 回调委托缓存集合
     /// </summary>
-    private List<(IComponent Key, Func<AjaxOption, Task<string?>> Callback)> Cache { get; set; } = new();
+    private List<(IComponent Key, Func<AjaxOption, Task<string?>> Callback)> Cache { get; } = new();
 
     /// <summary>
     /// 注册服务

test/UnitTest/Components/AutoCompleteTest.cs

@@ -19,6 +19,8 @@ public class AutoCompleteTest : BootstrapBlazorTestBase
             builder.Add(a => a.IsLikeMatch, true);
             builder.Add(a => a.IgnoreCase, false);
             builder.Add(a => a.Debounce, 2000);
+            builder.Add(a => a.ShowLabel, true);
+            builder.Add(a => a.DisplayText, "test");
         });
         Assert.Contains("<div class=\"auto-complete\"", cut.Markup);
     }