test(Upload): add unit test for upload reset (#6667)

* refactor: 更改写法消除警告信息

* feat: 增加 Reset 方法

* doc: 代码格式化

* revert: 撤销新方法

* test: 增加单元测试

Author: ArgoZhang

src/BootstrapBlazor/Components/Upload/ButtonUpload.razor

@@ -7,7 +7,8 @@
     <BootstrapLabel required="@Required" ShowLabelTooltip="ShowLabelTooltip" Value="@DisplayText" />
 }
 <div @attributes="@AdditionalAttributes" class="@ClassString" id="@Id">
-    <Button class="@BrowserButtonClassString" IsDisabled="@CheckStatus()" Size="Size" Icon="@BrowserButtonIcon" Text="@BrowserButtonText" Color="@BrowserButtonColor">
+    <Button class="@BrowserButtonClassString" IsDisabled="@CheckStatus()" Size="Size" Icon="@BrowserButtonIcon"
+            Text="@BrowserButtonText" Color="@BrowserButtonColor">
         @ChildContent
     </Button>
     @if (ShowUploadFileList)

src/BootstrapBlazor/Components/Upload/UploadBase.cs

@@ -149,7 +149,7 @@ protected async Task OnFileChange(InputFileChangeEventArgs args)
             fileCount = MaxFileCount.Value;
 
             // 计算剩余可上传数量
-            fileCount = fileCount - Files.Count;
+            fileCount -= Files.Count;
             if (fileCount <= 0)
             {
                 // 如果剩余可上传数量小于等于 0 则不允许继续上传

test/UnitTest/Components/UploadButtonTest.cs

@@ -86,7 +86,7 @@ public void ButtonUpload_IsDisabled_Ok()
     }
 
     [Fact]
-    public void InputUpload_IsMultiple()
+    public async Task InputUpload_IsMultiple()
     {
         var cut = Context.RenderComponent<ButtonUpload<string>>(pb =>
         {
@@ -108,6 +108,13 @@ public void InputUpload_IsMultiple()
         var button = cut.Find(".btn-browser");
         Assert.True(button.IsDisabled());
 
+        // 调用 Reset 方法
+        await cut.InvokeAsync(() => cut.Instance.Reset());
+
+        // 重置后上传按钮应该被启用
+        button = cut.Find(".btn-browser");
+        Assert.False(button.IsDisabled());
+
         // 开启多选功能
         cut.SetParametersAndRender(pb =>
         {