add Session#copy_attributes_from method

CHANGELOG.md

@@ -3,7 +3,7 @@
 Note: For changes to the API, see https://shopify.dev/changelog?filter=api
 
 ## Unreleased
-
+- Add `Session#copy_attributes_from` method
 
 ## 14.1.0
 - [#1071](https://github.com/Shopify/shopify-api-ruby/issues/1071) Fix FulfillmentEvent class types

lib/shopify_api/auth/session.rb

@@ -121,6 +121,17 @@ def deserialize(str)
         end
       end
 
+      sig { params(other: Session).returns(Session) }
+      def copy_attributes_from(other)
+        JSON.parse(other.serialize).keys.each do |key|
+          next if key.include?("^")
+
+          variable_name = "@#{key}"
+          instance_variable_set(variable_name, other.instance_variable_get(variable_name))
+        end
+        self
+      end
+
       sig { returns(String) }
       def serialize
         Oj.dump(self)

test/auth/session_test.rb

@@ -143,9 +143,63 @@ def test_from_with_online_access_token_response
         assert_equal(expected_session, session)
       end
 
+      def test_copy_attributes_from
+        session_to = ShopifyAPI::Auth::Session.new(
+          id: "session-id",
+          shop: "shop",
+          state: "some-state",
+          access_token: "to-token",
+          scope: "read_products,read_themes",
+          associated_user_scope: "read_products",
+          expires: Time.now - 3600,
+          associated_user: build_user,
+          is_online: true,
+          shopify_session_id: "123",
+        )
+
+        session_from = ShopifyAPI::Auth::Session.new(
+          id: "session-id",
+          shop: "shop",
+          state: nil,
+          access_token: "from-token",
+          scope: "write_products,read_themes",
+          associated_user_scope: "write_products",
+          expires: Time.now + 24 * 3600,
+          associated_user: build_user,
+          is_online: true,
+          shopify_session_id: "456",
+        )
+
+        assert_equal(session_to, session_to.copy_attributes_from(session_from))
+
+        assert_equal(session_from.shop, session_to.shop)
+        assert_nil(session_to.state)
+        assert_equal(session_from.access_token, session_to.access_token)
+        assert_equal(session_from.scope, session_to.scope)
+        assert_equal(session_from.associated_user_scope, session_to.associated_user_scope)
+        assert_equal(session_from.expires, session_to.expires)
+        assert_equal(session_from.associated_user, session_to.associated_user)
+        assert_equal(session_from.shopify_session_id, session_to.shopify_session_id)
+      end
+
       def teardown
         ShopifyAPI::Context.deactivate_session
       end
+
+      private
+
+      def build_user
+        ShopifyAPI::Auth::AssociatedUser.new(
+          id: 1,
+          first_name: "Hello #{Time.now}",
+          last_name: "World",
+          email: "Email",
+          email_verified: true,
+          account_owner: true,
+          locale: "en",
+          collaborator: false,
+        )
+      end
     end
   end
 end