feat: 测试基类添加单独得 GetService<TService>() 方法。

tests/ZonyLrcTools.Tests/TestBase.cs

@@ -28,5 +28,10 @@ namespace ZonyLrcTools.Tests
         }
 
         protected virtual void BuildServiceProvider() => ServiceProvider = ServiceCollection.BuildServiceProvider();
+
+        protected TService GetService<TService>()
+        {
+            return ServiceProvider.GetRequiredService<TService>();
+        }
     }
 }