test: add engine deadlock test (#78)

test/read_test.exs

@@ -938,6 +938,7 @@ defmodule AshGraphql.ReadTest do
              } = result
     end
 
+    @tag :wip
     test "loading relationships through an unnested union with aliases works" do
       user =
         AshGraphql.Test.User
@@ -947,16 +948,26 @@ defmodule AshGraphql.ReadTest do
       post =
         AshGraphql.Test.Post
         |> Ash.Changeset.for_create(
-          :with_comments,
+          :create,
           %{
+            author_id: user.id,
             text: "a",
-            comments: [%{text: "comment", author_id: user.id}],
-            sponsored_comments: [%{text: "sponsored"}],
             published: true
           }
         )
         |> AshGraphql.Test.Api.create!()
 
+      post =
+        post
+        |> Ash.Changeset.for_update(
+          :update_with_comments,
+          %{
+            comments: [%{text: "comment", author_id: user.id}],
+            sponsored_comments: [%{text: "sponsored"}]
+          }
+        )
+        |> AshGraphql.Test.Api.update!()
+
       resp =
         """
         query postLibrary {
@@ -972,8 +983,14 @@ defmodule AshGraphql.ReadTest do
               ...on SponsoredComment {
                 __typename
                 text
-                post {
+                p: post {
                   id
+                  user: author {
+                    name
+                    posts {
+                      id
+                    }
+                  }
                 }
               }
             }
@@ -1012,7 +1029,7 @@ defmodule AshGraphql.ReadTest do
                        %{
                          "__typename" => "SponsoredComment",
                          "text" => "sponsored",
-                         "post" => %{"id" => ^post_id}
+                         "p" => %{"id" => ^post_id, "user" => %{"name" => "fred"}}
                        },
                        %{
                          "__typename" => "Comment",

test/support/resources/post.ex

@@ -252,8 +252,10 @@ defmodule AshGraphql.Test.Post do
 
     update :update_with_comments do
       argument(:comments, {:array, :map})
+      argument(:sponsored_comments, {:array, :map})
 
       change(manage_relationship(:comments, type: :direct_control))
+      change(manage_relationship(:sponsored_comments, type: :direct_control))
     end
 
     update :update_confirm do

test/support/resources/user.ex

@@ -53,6 +53,10 @@ defmodule AshGraphql.Test.User do
     attribute(:name, :string)
   end
 
+  relationships do
+    has_many(:posts, AshGraphql.Test.Post, destination_attribute: :author_id)
+  end
+
   calculations do
     calculate(:name_twice, :string, expr(name <> " " <> name))
   end