shared_examples 'handle uploads' do
  let(:user)  { create(:user) }
  let(:jpg)   { fixture_file_upload('spec/fixtures/rails_sample.jpg', 'image/jpg') }
  let(:txt)   { fixture_file_upload('spec/fixtures/doc_sample.txt', 'text/plain') }
  let(:secret) { FileUploader.generate_secret }
  let(:uploader_class) { FileUploader }

  describe "POST #create" do
    context 'when a user is not authorized to upload a file' do
      it 'returns 404 status' do
        post :create, params.merge(file: jpg, format: :json)

        expect(response.status).to eq(404)
      end
    end

    context 'when a user can upload a file' do
      before do
        sign_in(user)
        model.add_developer(user)
      end

      context "without params['file']" do
        it "returns an error" do
          post :create, params.merge(format: :json)

          expect(response).to have_gitlab_http_status(422)
        end
      end

      context 'with valid image' do
        before do
          post :create, params.merge(file: jpg, format: :json)
        end

        it 'returns a content with original filename, new link, and correct type.' do
          expect(response.body).to match '\"alt\":\"rails_sample\"'
          expect(response.body).to match "\"url\":\"/uploads"
        end

        # NOTE: This is as close as we're getting to an Integration test for this
        # behavior. We're avoiding a proper Feature test because those should be
        # testing things entirely user-facing, which the Upload model is very much
        # not.
        it 'creates a corresponding Upload record' do
          upload = Upload.last

          aggregate_failures do
            expect(upload).to exist
            expect(upload.model).to eq(model)
          end
        end
      end

      context 'with valid non-image file' do
        before do
          post :create, params.merge(file: txt, format: :json)
        end

        it 'returns a content with original filename, new link, and correct type.' do
          expect(response.body).to match '\"alt\":\"doc_sample.txt\"'
          expect(response.body).to match "\"url\":\"/uploads"
        end
      end
    end
  end

  describe "GET #show" do
    let(:show_upload) do
      get :show, params.merge(secret: secret, filename: "rails_sample.jpg")
    end

    before do
      expect(FileUploader).to receive(:generate_secret).and_return(secret)
      UploadService.new(model, jpg, uploader_class).execute
    end

    context "when the model is public" do
      before do
        model.update_attribute(:visibility_level, Gitlab::VisibilityLevel::PUBLIC)
      end

      context "when not signed in" do
        context "when the file exists" do
          it "responds with status 200" do
            show_upload

            expect(response).to have_gitlab_http_status(200)
          end
        end

        context "when neither the uploader nor the model exists" do
          before do
            allow_any_instance_of(Upload).to receive(:build_uploader).and_return(nil)
            allow(controller).to receive(:find_model).and_return(nil)
          end

          it "responds with status 404" do
            show_upload

            expect(response).to have_gitlab_http_status(404)
          end
        end

        context "when the file doesn't exist" do
          before do
            allow_any_instance_of(FileUploader).to receive(:exists?).and_return(false)
          end

          it "responds with status 404" do
            show_upload

            expect(response).to have_gitlab_http_status(404)
          end
        end
      end

      context "when signed in" do
        before do
          sign_in(user)
        end

        context "when the file exists" do
          it "responds with status 200" do
            show_upload

            expect(response).to have_gitlab_http_status(200)
          end
        end

        context "when the file doesn't exist" do
          before do
            allow_any_instance_of(FileUploader).to receive(:exists?).and_return(false)
          end

          it "responds with status 404" do
            show_upload

            expect(response).to have_gitlab_http_status(404)
          end
        end
      end
    end

    context "when the model is private" do
      before do
        model.update_attribute(:visibility_level, Gitlab::VisibilityLevel::PRIVATE)
      end

      context "when not signed in" do
        context "when the file exists" do
          context "when the file is an image" do
            before do
              allow_any_instance_of(FileUploader).to receive(:image?).and_return(true)
            end

            it "responds with status 200" do
              show_upload

              expect(response).to have_gitlab_http_status(200)
            end
          end

          context "when the file is not an image" do
            before do
              allow_any_instance_of(FileUploader).to receive(:image?).and_return(false)
            end

            it "redirects to the sign in page" do
              show_upload

              expect(response).to redirect_to(new_user_session_path)
            end
          end
        end

        context "when the file doesn't exist" do
          before do
            allow_any_instance_of(FileUploader).to receive(:exists?).and_return(false)
          end

          it "redirects to the sign in page" do
            show_upload

            expect(response).to redirect_to(new_user_session_path)
          end
        end
      end

      context "when signed in" do
        before do
          sign_in(user)
        end

        context "when the user has access to the project" do
          before do
            model.add_developer(user)
          end

          context "when the file exists" do
            it "responds with status 200" do
              show_upload

              expect(response).to have_gitlab_http_status(200)
            end
          end

          context "when the file doesn't exist" do
            before do
              allow_any_instance_of(FileUploader).to receive(:exists?).and_return(false)
            end

            it "responds with status 404" do
              show_upload

              expect(response).to have_gitlab_http_status(404)
            end
          end
        end

        context "when the user doesn't have access to the model" do
          context "when the file exists" do
            context "when the file is an image" do
              before do
                allow_any_instance_of(FileUploader).to receive(:image?).and_return(true)
              end

              it "responds with status 200" do
                show_upload

                expect(response).to have_gitlab_http_status(200)
              end
            end

            context "when the file is not an image" do
              before do
                allow_any_instance_of(FileUploader).to receive(:image?).and_return(false)
              end

              it "responds with status 404" do
                show_upload

                expect(response).to have_gitlab_http_status(404)
              end
            end
          end

          context "when the file doesn't exist" do
            before do
              allow_any_instance_of(FileUploader).to receive(:exists?).and_return(false)
            end

            it "responds with status 404" do
              show_upload

              expect(response).to have_gitlab_http_status(404)
            end
          end
        end
      end
    end
  end
end
