Added test for prevention

Author: linkdotnet

src/LinkDotNet.Blog.Web/Features/Admin/BlogPostEditor/Components/CreateNewBlogPost.razor

@@ -127,12 +127,12 @@
 
     private void PreventNavigationWhenDirty(LocationChangingContext context)
     {
-        if (model.IsDirty && !ignoreIsDirty)
-        {
-            context.PreventNavigation();
-            ToastService.ShowWarning(
-                "You have unsaved changes. Click on this message to ignore this warning the next time",
-                onClick: () => ignoreIsDirty = true);
-        }
+        if (!model.IsDirty || ignoreIsDirty)
+            return;
+
+        context.PreventNavigation();
+        ToastService.ShowWarning(
+            "You have unsaved changes. Click on this message to ignore this warning the next time",
+            onClick: () => ignoreIsDirty = true);
     }
 }

tests/LinkDotNet.Blog.UnitTests/Web/Features/Admin/BlogPostEditor/Components/CreateNewBlogPostTests.cs

@@ -192,4 +192,21 @@ public void ShouldStopInternalNavigationWhenDirty()
 
         fakeNavigationManager.History.Count.Should().Be(1);
     }
+
+    [Fact(Skip = "Need bUnit > 1.9.8")]
+    public void ShouldNotPreventWhenToastIsClicked()
+    {
+        var toastMock = new Mock<IToastService>();
+        Services.AddScoped(_ => toastMock.Object);
+        toastMock.Setup(t => t.ShowWarning(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<Action>()))
+            .Callback<string, string, Action>((_, _, onClick) => onClick());
+        var cut = RenderComponent<CreateNewBlogPost>();
+        cut.Find("#tags").Change("Hey");
+        var fakeNavigationManager = Services.GetRequiredService<FakeNavigationManager>();
+        fakeNavigationManager.NavigateTo("/internal");
+
+        fakeNavigationManager.NavigateTo("/internal");
+
+        fakeNavigationManager.History.Count.Should().Be(2);
+    }
 }