1 files changed, 105 insertions, 0 deletions
diff --git a/spec/requests/projects/airflow/dags_controller_spec.rb b/spec/requests/projects/airflow/dags_controller_spec.rb
new file mode 100644
index 00000000000..2dcedf5f128
--- /dev/null
+++ b/spec/requests/projects/airflow/dags_controller_spec.rb
@@ -0,0 +1,105 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Projects::Airflow::DagsController, feature_category: :dataops do
+  let_it_be(:non_member) { create(:user) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group).tap { |p| p.add_developer(user) } }
+  let_it_be(:project) { create(:project, group: group).tap { |p| p.add_developer(user) } }
+
+  let(:current_user) { user }
+  let(:feature_flag) { true }
+
+  let_it_be(:dags) do
+    create_list(:airflow_dags, 5, project: project)
+  end
+
+  let(:params) { { namespace_id: project.namespace.to_param, project_id: project } }
+  let(:extra_params) { {} }
+
+  before do
+    sign_in(current_user) if current_user
+    stub_feature_flags(airflow_dags: false)
+    stub_feature_flags(airflow_dags: project) if feature_flag
+    list_dags
+  end
+
+  shared_examples 'returns a 404 if feature flag disabled' do
+    context 'when :airflow_dags disabled' do
+      let(:feature_flag) { false }
+
+      it 'is 404' do
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+  end
+
+  describe 'GET index' do
+    it 'renders the template' do
+      expect(response).to render_template('projects/airflow/dags/index')
+    end
+
+    describe 'pagination' do
+      before do
+        stub_const("Projects::Airflow::DagsController::MAX_DAGS_PER_PAGE", 2)
+        dags
+
+        list_dags
+      end
+
+      context 'when out of bounds' do
+        let(:params) { extra_params.merge(page: 10000) }
+
+        it 'redirects to last page' do
+          last_page = (dags.size + 1) / 2
+          expect(response).to redirect_to(project_airflow_dags_path(project, page: last_page))
+        end
+      end
+
+      context 'when bad page' do
+        let(:params) { extra_params.merge(page: 's') }
+
+        it 'uses first page' do
+          expect(assigns(:pagination)).to include(
+            page: 1,
+            is_last_page: false,
+            per_page: 2,
+            total_items: dags.size)
+        end
+      end
+    end
+
+    it 'does not perform N+1 sql queries' do
+      control_count = ActiveRecord::QueryRecorder.new(skip_cached: false) { list_dags }
+
+      create_list(:airflow_dags, 1, project: project)
+
+      expect { list_dags }.not_to exceed_all_query_limit(control_count)
+    end
+
+    context 'when user is not logged in' do
+      let(:current_user) { nil }
+
+      it 'redirects to login' do
+        expect(response).to redirect_to(new_user_session_path)
+      end
+    end
+
+    context 'when user is not a member' do
+      let(:current_user) { non_member }
+
+      it 'returns a 404' do
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+
+    it_behaves_like 'returns a 404 if feature flag disabled'
+  end
+
+  private
+
+  def list_dags
+    get project_airflow_dags_path(project), params: params
+  end
+end