E2E test updates

Author: SteveSandersonMS

src/Components/test/E2ETest/ServerRenderingTests/FormHandlingTests/FormWithParentBindingContextTest.cs

@@ -768,32 +768,15 @@ public void CanDispatchToFormDefinedInNonPageComponent(bool suppressEnhancedNavi
     }
 
     [Fact]
-    public void CanRenderAmbiguousForms()
+    public void CannotRenderAmbiguousForms()
     {
         var dispatchToForm = new DispatchToForm(this)
         {
             Url = "forms/ambiguous-forms",
             FormCssSelector = "form",
             ExpectedActionValue = null,
-            DispatchEvent = false
-        };
-        DispatchToFormCore(dispatchToForm);
-    }
-
-    [Theory]
-    [InlineData(true)]
-    [InlineData(false)]
-    public void DispatchingToAmbiguousFormFails(bool suppressEnhancedNavigation)
-    {
-        var dispatchToForm = new DispatchToForm(this)
-        {
-            Url = "forms/ambiguous-forms",
-            FormCssSelector = "form",
-            ExpectedActionValue = null,
-            DispatchEvent = true,
-            SubmitButtonId = "send-second",
+            DispatchEvent = false,
             ShouldCauseInternalServerError = true,
-            SuppressEnhancedNavigation = suppressEnhancedNavigation,
         };
         DispatchToFormCore(dispatchToForm);
     }
@@ -824,19 +807,6 @@ public void FormThatDisappearsBeforeQuiesceDoesNotBind()
         DispatchToFormCore(dispatchToForm);
     }
 
-    [Fact]
-    public void ChangingComponentsToDispatchBeforeQuiesceDoesNotBind()
-    {
-        var dispatchToForm = new DispatchToForm(this)
-        {
-            Url = "forms/switching-components-does-not-bind",
-            FormCssSelector = "form",
-            ExpectedActionValue = null,
-            ShouldCauseInternalServerError = true,
-        };
-        DispatchToFormCore(dispatchToForm);
-    }
-
     [Fact]
     public async Task CanPostFormsWithStreamingRenderingAsync()
     {
@@ -972,6 +942,13 @@ private void DispatchToFormCore(DispatchToForm dispatch)
 
         GoTo(dispatch.Url);
 
+        if (!dispatch.DispatchEvent && dispatch.ShouldCauseInternalServerError)
+        {
+            // Chrome's built-in error UI for a 500 response when there's no response content
+            Browser.Exists(By.Id("main-frame-error"));
+            return;
+        }
+
         Browser.Exists(By.Id(dispatch.Ready));
         var form = Browser.Exists(By.CssSelector(dispatch.FormCssSelector));
         var formTarget = form.GetAttribute("action");

src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/Forms/AmbiguousForms.razor

@@ -3,20 +3,8 @@
 
 <h2>Ambiguous forms</h2>
 
-<EditForm EditContext="_editContext" method="POST" OnValidSubmit="() => _submitted = true">
-    <input id="send" type="submit" value="Send" />
+<EditForm Model="this" method="POST" OnValidSubmit="() => {}">
 </EditForm>
 
-<EditForm EditContext="_editContext" method="POST" OnValidSubmit="() => _submitted = true">
-    <input id="send-second" type="submit" value="Send" />
+<EditForm Model="this" method="POST" OnValidSubmit="() => {}">
 </EditForm>
-
-@if (_submitted)
-{
-    <p id="pass">Form submitted!</p>
-}
-
-@code{
-    bool _submitted = false;
-    EditContext _editContext = new EditContext(new object());
-}