Move a user's merge requests to the ghost user.

1. When the user is deleted.

2. Refactor out code relating to "migrating records to the ghost user" into a
   `MigrateToGhostUser` concern, which is tested using a shared example.

1 files changed, 53 insertions, 0 deletions

diff --git a/spec/support/services/user_destroy_service_migrate_to_ghost_user_shared_examples.rb b/spec/support/services/user_destroy_service_migrate_to_ghost_user_shared_examples.rb
new file mode 100644
index 00000000000..8996e3420e6
--- /dev/null
+++ b/spec/support/services/user_destroy_service_migrate_to_ghost_user_shared_examples.rb
@@ -0,0 +1,53 @@
+require "spec_helper"
+
+shared_examples "migrating a deleted user's associated records to the ghost user" do |record_class|
+  record_class_name = record_class.to_s.titleize.downcase
+
+  let(:project) { create(:project) }
+
+  before do
+    project.add_developer(user)
+  end
+
+  context "for a #{record_class_name} the user has created" do
+    let!(:record) { created_record }
+
+    it "does not delete the #{record_class_name}" do
+      service.execute(user)
+
+      expect(record_class.find_by_id(record.id)).to be_present
+    end
+
+    it "migrates the #{record_class_name} so that the 'Ghost User' is the #{record_class_name} owner" do
+      service.execute(user)
+
+      migrated_record = record_class.find_by_id(record.id)
+
+      expect(migrated_record.author).to eq(User.ghost)
+    end
+
+    it "blocks the user before migrating #{record_class_name}s to the 'Ghost User'" do
+      service.execute(user)
+
+      expect(user).to be_blocked
+    end
+  end
+
+  context "for a #{record_class_name} the user was assigned to" do
+    let!(:record) { assigned_record }
+
+    before do
+      service.execute(user)
+    end
+
+    it "does not delete #{record_class_name}s the user is assigned to" do
+      expect(record_class.find_by_id(record.id)).to be_present
+    end
+
+    it "migrates the #{record_class_name} so that it is 'Unassigned'" do
+      migrated_record = record_class.find_by_id(record.id)
+
+      expect(migrated_record.assignee).to be_nil
+    end
+  end
+end