Fix navigation lock tests (#57372)

Author: MackinnonBuck

src/Components/test/E2ETest/ServerExecutionTests/NavigationLockPrerenderingTest.cs

@@ -21,6 +21,9 @@ public NavigationLockPrerenderingTest(
     {
     }
 
+    public override Task InitializeAsync()
+        => InitializeAsync(BrowserFixture.RoutingTestContext);
+
     [Fact]
     [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/57153")]
     public void NavigationIsLockedAfterPrerendering()

src/Components/test/E2ETest/Tests/RoutingTest.cs

@@ -26,6 +26,9 @@ public RoutingTest(
     {
     }
 
+    public override Task InitializeAsync()
+        => InitializeAsync(BrowserFixture.RoutingTestContext);
+
     protected override void InitializeAsyncCore()
     {
         Navigate(ServerPathBase);

src/Shared/E2ETesting/BrowserFixture.cs

@@ -14,6 +14,8 @@ namespace Microsoft.AspNetCore.E2ETesting;
 public class BrowserFixture : IAsyncLifetime
 {
     public static string StreamingContext { get; } = "streaming";
+    public static string RoutingTestContext { get; } = "routing";
+
     private readonly ConcurrentDictionary<string, (IWebDriver browser, ILogs log)> _browsers = new();
 
     public BrowserFixture(IMessageSink diagnosticsMessageSink)
@@ -123,6 +125,17 @@ private async Task DeleteBrowserUserProfileDirectoriesAsync()
     {
         var opts = new ChromeOptions();
 
+        if (context?.StartsWith(RoutingTestContext, StringComparison.Ordinal) == true)
+        {
+            // Enables WebDriver BiDi, which is required to allow the 'beforeunload' event
+            // to display an alert dialog. This is needed by some of our routing tests.
+            // See: https://w3c.github.io/webdriver/#user-prompts
+            // We could consider making this the default for all tests when the BiDi spec
+            // becomes standard (it's in draft at the time of writing).
+            // See: https://w3c.github.io/webdriver-bidi/
+            opts.UseWebSocketUrl = true;
+        }
+
         if (context?.StartsWith(StreamingContext, StringComparison.Ordinal) == true)
         {
             // Tells Selenium not to wait until the page navigation has completed before continuing with the tests