Checks if deleting forked project closed all open merge requests

app/controllers/projects/merge_requests_controller.rb

@@ -429,7 +429,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
   def validates_merge_request
     # If source project was removed (Ex. mr from fork to origin)
-    return invalid_mr unless @merge_request.source_project
+    # return invalid_mr unless @merge_request.source_project
 
     # Show git not found page
     # if there is no saved commits between source & target branch
@@ -438,7 +438,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
       return invalid_mr unless @merge_request.target_branch_exists?
 
       # or if source branch doesn't exist
-      return invalid_mr unless @merge_request.source_branch_exists?
+      # return invalid_mr unless @merge_request.source_branch_exists?
     end
   end
 

app/models/merge_request.rb

@@ -313,7 +313,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def closed_without_fork?
-    closed? && forked_source_project_missing?
+    closed? && (forked_source_project_missing? || !source_project)
   end
 
   def forked_source_project_missing?

spec/controllers/projects_controller_spec.rb

@@ -192,10 +192,12 @@ describe ProjectsController do
       end
 
       it "closes all related merge requests" do
-        fork_project.destroy
+        project.merge_requests << merge_request
+        sign_in(admin)
 
-        expect(fork_project.destroyed?).to be_truthy
-        expect(merge_request.state).to eq('closed')
+        delete :destroy, namespace_id: fork_project.namespace.path, id: fork_project.path
+
+        expect(merge_request.reload.state).to eq('closed')
       end
     end
   end