Make sure the Photino dll is in correct location.

Author: ilonatommy

src/Components/WebView/test/E2ETest/Microsoft.AspNetCore.Components.WebViewE2E.Test.csproj

@@ -4,4 +4,9 @@
     <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <!-- Add project reference to ensure PhotinoTestApp is built and copied to our output directory -->
+    <ProjectReference Include="..\..\Samples\PhotinoPlatform\testassets\PhotinoTestApp\PhotinoTestApp.csproj" />
+  </ItemGroup>
+
 </Project>

src/Components/WebView/test/E2ETest/WebViewManagerE2ETests.cs

@@ -20,18 +20,14 @@ public class WebViewManagerE2ETests
         SkipReason = "On Helix/Ubuntu the native Photino assemblies can't be found, and on macOS it can't detect when the WebView is ready")]
     public async Task CanLaunchPhotinoWebViewAndClickButton()
     {
-        // Get the path to the PhotinoTestApp instead of the current test assembly
-        var currentAssemblyPath = typeof(WebViewManagerE2ETests).Assembly.Location;
-
-        // Extract the current assembly name from the path (without .dll extension)
-        var currentAssemblyName = Path.GetFileNameWithoutExtension(currentAssemblyPath);
-
-        // Replace the current assembly name with "PhotinoTestApp" in the entire path
-        var photinoTestAppPath = currentAssemblyPath.Replace(currentAssemblyName, "PhotinoTestApp");
+        // With the project reference, PhotinoTestApp.dll should be copied to the same directory as this test assembly
+        var testAssemblyDirectory = Path.GetDirectoryName(typeof(WebViewManagerE2ETests).Assembly.Location)!;
+        var photinoTestAppPath = Path.Combine(testAssemblyDirectory, "PhotinoTestApp.dll");
 
         if (!File.Exists(photinoTestAppPath))
         {
-            throw new FileNotFoundException($"Could not find PhotinoTestApp.dll at: {photinoTestAppPath}");
+            throw new FileNotFoundException($"Could not find PhotinoTestApp.dll at: {photinoTestAppPath}. " +
+                "Ensure the PhotinoTestApp project reference is properly configured.");
         }
 
         // This test launches the PhotinoTestApp sample as an executable so that the Photino UI window