Move granting test id to the base class.

Author: ilonatommy

src/Components/test/E2ETest/ServerRenderingTests/EnhancedNavigationTest.cs

@@ -31,12 +31,7 @@ public EnhancedNavigationTest(
     // One of the tests here makes use of the streaming rendering page, which uses global state
     // so we can't run at the same time as other such tests
     public override Task InitializeAsync()
-    {
-        var initTask =  InitializeAsync(BrowserFixture.StreamingContext);
-        var testId = Guid.NewGuid().ToString("N")[..8];
-        ((IJavaScriptExecutor)Browser).ExecuteScript($"sessionStorage.setItem('test-id', '{testId}')");
-        return initTask;
-    }
+        => InitializeAsync(BrowserFixture.StreamingContext);
 
     [Fact]
     public void CanNavigateToAnotherPageWhilePreservingCommonDOMElements()

src/Shared/E2ETesting/BrowserTestBase.cs

@@ -63,9 +63,16 @@ public virtual Task InitializeAsync(string isolationContext)
     {
         InitializeBrowser(isolationContext);
         InitializeAsyncCore();
+        GrantTestId();
         return Task.CompletedTask;
     }
 
+    private void GrantTestId()
+    {
+        var testId = Guid.NewGuid().ToString("N")[..8];
+        ((IJavaScriptExecutor)Browser).ExecuteScript($"sessionStorage.setItem('test-id', '{testId}')");
+    }
+
     protected virtual void InitializeAsyncCore()
     {
     }