Per-component interactivity: test navigation to non-existing page.

Author: ilonatommy

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

@@ -1411,4 +1411,41 @@ public void NavigatesWithInteractivityByRequestRedirection(bool controlFlowByExc
         Browser.Click(By.Id("redirectButton"));
         Browser.Equal("Routing test cases", () => Browser.Exists(By.Id("test-info")).Text);
     }
+
+    [Theory]
+    // prerendering (SSR) is tested in NoInteractivityTest
+    [InlineData("ServerNonPrerendered")]
+    [InlineData("WebAssemblyNonPrerendered")]
+    public void ProgrammaticNavigationToNotExistingPathReExecutesTo404(string renderMode)
+    {
+        Navigate($"{ServerPathBase}/reexecution/redirection-not-found?render-mode={renderMode}&navigate-programmatically=true");
+        Assert404ReExecuted();
+    }
+
+    [Theory]
+    // prerendering (SSR) is tested in NoInteractivityTest
+    [InlineData("ServerNonPrerendered")]
+    [InlineData("WebAssemblyNonPrerendered")]
+    public void LinkNavigationToNotExistingPathReExecutesTo404(string renderMode)
+    {
+        Navigate($"{ServerPathBase}/reexecution/redirection-not-found?render-mode={renderMode}");
+        Browser.Click(By.Id("link-to-not-existing-page"));
+        Assert404ReExecuted();
+    }
+
+    [Theory]
+    // prerendering (SSR) is tested in NoInteractivityTest
+    [InlineData("ServerNonPrerendered")]
+    [InlineData("WebAssemblyNonPrerendered")]
+    public void BrowserNavigationToNotExistingPathReExecutesTo404(string renderMode)
+    {
+        // non-existing path has to have re-execution middleware set up
+        // so it has to have "reexecution" prefix. Otherwise middleware mapping
+        // will not be activated, see configuration in Startup
+        Navigate($"{ServerPathBase}/reexecution/not-existing-page?render-mode={renderMode}");
+        Assert404ReExecuted();
+    }
+
+    private void Assert404ReExecuted() =>
+        Browser.Equal("Welcome On Page Re-executed After Not Found Event", () => Browser.Exists(By.Id("test-info")).Text);
 }

src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/NotFound/RedirectionNotFound-Interactive.razor

@@ -0,0 +1,32 @@
+@page "/redirection-not-found"
+@page "/reexecution/redirection-not-found"
+@rendermode @(RenderModeHelper.GetRenderMode(_currentRenderMode))
+@inject NavigationManager NavigationManager
+
+<PageTitle>Original page</PageTitle>
+
+<p id="test-info">Any content</p>
+<a id="link-to-not-existing-page" href="@(_nonExistingPath)">
+    Go to not-existing-page
+</a>
+
+@code{
+    [Parameter, SupplyParameterFromQuery(Name = "renderMode")]
+    public string? RenderModeStr { get; set; }
+
+    [Parameter]
+    [SupplyParameterFromQuery(Name = "navigate-programmatically")]
+    public bool? NavigateProgrammatically { get; set; }
+
+    private string? _nonExistingPath;
+    private RenderModeId _currentRenderMode => RenderModeHelper.ParseRenderMode(RenderModeStr);
+
+    protected override void OnInitialized()
+    {
+        _nonExistingPath = $"{NavigationManager.BaseUri}not-existing-page";
+        if (NavigateProgrammatically == true)
+        {
+            NavigationManager.NavigateTo(_nonExistingPath);
+        }
+    }
+}