fix path bug and update specs

app/services/projects/transfer_service.rb

@@ -43,7 +43,7 @@ module Projects
       @new_path = File.join(@new_namespace.try(:full_path) || '', project.path)
       @old_namespace = project.namespace
-      if Project.where(namespace_id: @new_namespace.try(:id)).where('path = ? or name = ?', project.path, project.path).exists?
+      if Project.where(namespace_id: @new_namespace.try(:id)).where('path = ? or name = ?', project.path, project.name).exists?
         raise TransferError.new("Project with same name or path in target namespace already exists")
       end

spec/services/projects/transfer_service_spec.rb

@@ -172,8 +172,9 @@ describe Projects::TransferService do
   context 'target namespace containing the same project name' do
     before do
       group.add_owner(user)
-      create(:project, name: project.name, group: group, path: 'other')
+      project.update(name: 'new_name')
+      create(:project, name: 'new_name', group: group, path: 'other')
       @result = transfer_project(project, user, group)
     end
@@ -187,7 +188,7 @@ describe Projects::TransferService do
     before do
       group.add_owner(user)
-      create(:project, name: project.name, group: group)
+      create(:project, name: 'other-name', path: project.path, group: group)
       @result = transfer_project(project, user, group)
     end