Add E2E tests for the FileDownload

Author: rolandVi

src/Components/Web.JS/src/Rendering/BinaryMedia.ts

@@ -310,7 +310,6 @@ export class BinaryMedia {
     element.addEventListener('error', onError, { once: true });
   }
 
-  // Added: trigger a download using BinaryMedia pipeline (formerly BinaryFileDownload)
   public static async downloadAsync(
     element: HTMLElement,
     streamRef: { stream: () => Promise<ReadableStream<Uint8Array>> } | null,

src/Components/Web/src/Media/FileDownload.cs

@@ -85,14 +85,16 @@ private async Task OnClickAsync()
         CancelPreviousLoad();
         var token = ResetCancellationToken();
         _hasError = false;
+        _currentSource = Source;
+        Render();
 
         var source = Source;
 
         using var streamRef = new DotNetStreamReference(source.Stream, leaveOpen: true);
 
         try
         {
-            var result = await JSRuntime.InvokeAsync<Boolean>(
+            var result = await JSRuntime.InvokeAsync<bool>(
                 "Blazor._internal.BinaryMedia.downloadAsync",
                 token,
                 Element,
@@ -101,8 +103,9 @@ private async Task OnClickAsync()
                 source.Length,
                 FileName);
 
-            if (result && !token.IsCancellationRequested)
+            if (!token.IsCancellationRequested)
             {
+                _currentSource = null;
                 if (!result)
                 {
                     _hasError = true;
@@ -112,9 +115,12 @@ private async Task OnClickAsync()
         }
         catch (OperationCanceledException)
         {
+            _currentSource = null;
+            Render();
         }
         catch
         {
+            _currentSource = null;
             _hasError = true;
             Render();
         }