Redmine

      if (addFile(inputEl, new File([file], filename, { type: file.type }), true) == null) {

        window.alert(inputEl.data('max-number-of-files-message'));

        break;

      }

  def test_pasting_image_beyond_max_attachments_at_once_should_show_error

    set_tmp_attachments_directory

    log_user('jsmith', 'jsmith')

    Redmine::Configuration.with('max_attachments_at_once' => 2) do

      visit '/projects/ecookbook/issues/new'

    end

    paste_image = lambda do

      page.execute_script(<<~JS)

        // 1x1 1-bit grayscale PNG image

        const png = Uint8Array.from(atob('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQAAAAA3bvkkAAAACklEQVR42mNgAAAAAgAB5Sfe/AAAAABJRU5ErkJggg=='), c => c.charCodeAt(0));

        const clipboardData = new DataTransfer();

        clipboardData.items.add(new File([png], 'image.png', { type: 'image/png' }));

        const event = new Event('paste', { bubbles: true, cancelable: true });

        Object.defineProperty(event, 'clipboardData', { value: clipboardData });

        document.getElementById('issue_description').dispatchEvent(event);

      JS

    end

    2.times { paste_image.call }

    assert_selector '.attachments_fields > span', :count => 2

    accept_alert(/maximum number of files that can be attached simultaneously \(2\)/) do

      paste_image.call

    end

    assert_selector '.attachments_fields > span', :count => 2

  end