fix file upload

lib/api/project_import.rb

@@ -8,7 +8,7 @@ module API
       end
       def file_is_valid?
-        import_params[:file] && import_params[:file].respond_to?(:read)
+        import_params[:file] && import_params[:file]['tempfile'].respond_to?(:read)
       end
     end
@@ -26,7 +26,7 @@ module API
         success Entities::ProjectImportStatus
       end
       post 'import' do
-        render_api_error!('The branch refname is invalid', 400) unless file_is_valid?
+        render_api_error!('The file is invalid', 400) unless file_is_valid?
         namespace = import_params[:namespace]
@@ -38,7 +38,8 @@ module API
                       Namespace.find_by_path_or_name(namespace)
                     end
-        project_params = import_params.merge(namespace_id: namespace.id)
+        project_params = import_params.merge(namespace_id: namespace.id,
+                                             file: import_params[:file]['tempfile'])
         project = ::Projects::GitlabProjectsImportService.new(current_user, project_params).execute

spec/requests/api/project_import_spec.rb

@@ -19,9 +19,9 @@ describe API::ProjectImport do
     it 'schedules an import' do
       expect_any_instance_of(Project).to receive(:import_schedule)
-      post api('/projects/import', user), path: 'test-import', file: file, namespace: namespace.full_path
-      expect(response).to have_gitlab_http_status(200)
+      post api('/projects/import', user), path: 'test-import', file: fixture_file_upload(file), namespace: namespace.full_path
+      expect(response).to have_gitlab_http_status(201)
       expect(Project.find_by_name('test-import').first.status).to eq('started')
     end