Books: On delete, redirect to shelf if in context

For #6029
Added tests to cover

app/Entities/Controllers/BookController.php

@@ -224,9 +224,14 @@ class BookController extends Controller
     {
         $book = $this->queries->findVisibleBySlugOrFail($bookSlug);
         $this->checkOwnablePermission(Permission::BookDelete, $book);
+        $contextShelf = $this->shelfContext->getContextualShelfForBook($book);
 
         $this->bookRepo->destroy($book);
 
+        if ($contextShelf) {
+            return redirect($contextShelf->getUrl());
+        }
+
         return redirect('/books');
     }
 

tests/Entity/BookTest.php

@@ -154,6 +154,20 @@ class BookTest extends TestCase
         $this->assertNotificationContains($redirectReq, 'Book Successfully Deleted');
     }
 
+    public function test_delete_with_shelf_context_returns_to_shelf_view_after_delete()
+    {
+        $shelf = $this->entities->shelfHasBooks();
+        /** @var Book $book */
+        $book = $shelf->books()->first();
+
+        $this->asEditor()->get($shelf->getUrl());
+        $this->get($book->getUrl());
+        $this->get($book->getUrl('/delete'));
+        $resp = $this->delete($book->getUrl());
+
+        $resp->assertRedirect($shelf->getUrl());
+    }
+
     public function test_cancel_on_create_page_leads_back_to_books_listing()
     {
         $resp = $this->asEditor()->get('/create-book');

tests/Helpers/EntityProvider.php

@@ -110,6 +110,14 @@ class EntityProvider
         return $shelf;
     }
 
+    /**
+     * Get a shelf that has books assigned.
+     */
+    public function shelfHasBooks(): Bookshelf
+    {
+        return $this->shelf(fn(Builder $query) => $query->whereHas('books'));
+    }
+
     /**
      * Get all entity types from the system.
      * @return array{page: Page, chapter: Chapter, book: Book, bookshelf: Bookshelf}