Check if jira project key has been provided

app/controllers/projects/import/jira_controller.rb

@@ -22,8 +22,14 @@ module Projects
       end
 
       def import
-        response = ::JiraImport::StartImportService.new(current_user, @project, jira_import_params[:jira_project_key]).execute
+        jira_project_key = jira_import_params[:jira_project_key]
+
+        if jira_project_key.present?
+          response = ::JiraImport::StartImportService.new(current_user, @project, jira_project_key).execute
           flash[:notice] = response.message if response.message.present?
+        else
+          flash[:alert] = 'No jira project key has been provided.'
+        end
 
         redirect_to project_import_jira_path(@project)
       end

spec/controllers/projects/import/jira_controller_spec.rb

@@ -93,6 +93,16 @@ describe Projects::Import::JiraController do
           end
 
           context 'post import' do
+            context 'when jira project key is empty' do
+              it 'redirects back to show with an error' do
+                post :import, params: { namespace_id: project.namespace, project_id: project, jira_project_key: '' }
+
+                expect(response).to redirect_to(project_import_jira_path(project))
+                expect(flash[:alert]).to eq('No jira project key has been provided.')
+              end
+            end
+
+            context 'when everything is ok' do
               it 'creates import state' do
                 expect(project.import_state).to be_nil
 
@@ -108,6 +118,7 @@ describe Projects::Import::JiraController do
               end
             end
           end
+        end
 
         context 'when import state is scheduled' do
           let_it_be(:import_state) { create(:import_state, project: project, status: :scheduled) }