Fix 'AllOf cast returns a map, but I expected a struct' (#592)

* Add failing test

* Cast result of AllOf cast into a struct

* Shorter module name

lib/open_api_spex/cast/all_of.ex

@@ -34,14 +34,14 @@ defmodule OpenApiSpex.Cast.AllOf do
     cast_all_of(%{ctx | schema: %{schema | allOf: [nested_schema | remaining]}}, result)
   end
 
-  defp cast_all_of(%{schema: %{allOf: []}, errors: []} = ctx, acc) do
+  defp cast_all_of(%{schema: %{allOf: [], "x-struct": module}, errors: []} = ctx, acc)
+       when not is_nil(module) do
     with :ok <- Utils.check_required_fields(ctx, acc) do
-      {:ok, acc}
+      {:ok, struct(module, acc)}
     end
   end
 
-  defp cast_all_of(%{schema: %{allOf: [], errors: [], "x-struct": module}} = ctx, acc)
-       when not is_nil(module) do
+  defp cast_all_of(%{schema: %{allOf: []}, errors: []} = ctx, acc) do
     with :ok <- Utils.check_required_fields(ctx, acc) do
       {:ok, acc}
     end

test/cast/all_of_test.exs

@@ -355,6 +355,7 @@ defmodule OpenApiSpex.CastAllOfTest do
 
   test "with schema having x-type" do
     value = %{fur: true, meow: true}
-    assert {:ok, _} = cast(value: value, schema: CatSchema.schema())
+
+    assert {:ok, %CatSchema{fur: true, meow: true}} = cast(value: value, schema: CatSchema.schema())
   end
 end