webui: Do not allow empty pagination size

Pagination size must be required, the current validators are triggered after
form is submitted, thus the only way for check if data is not empty is by making
the field required.

Fixes: https://pagure.io/freeipa/issue/9192

Signed-off-by: Armando Neto <abiagion@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

install/ui/src/freeipa/Application_controller.js

@@ -318,6 +318,7 @@ define([
                         $type: 'text',
                         name: 'pagination_size',
                         label: '@i18n:customization.table_pagination',
+                        required: true,
                         validators: ['positive_integer']
                     }
                 ]

ipatests/test_webui/test_misc_cases.py

@@ -11,6 +11,11 @@ from ipatests.test_webui.ui_driver import screenshot
 import pytest
 import re
 
+try:
+    from selenium.webdriver.common.by import By
+except ImportError:
+    pass
+
 
 @pytest.mark.tier1
 class TestMiscCases(UI_driver):
@@ -26,3 +31,17 @@ class TestMiscCases(UI_driver):
         ver_re = re.compile('version: .*')
         assert re.search(ver_re, about_text), 'Version not found'
         self.dialog_button_click('ok')
+
+    @screenshot
+    def test_customization_pagination_input_required(self):
+        """Test if 'pagination size' is required when submitting the form."""
+        self.init_app()
+
+        self.profile_menu_action('configuration')
+        self.fill_input('pagination_size', '')
+        self.dialog_button_click('save')
+
+        pagination_size_elem = self.find(
+            ".widget[name='pagination_size']", By.CSS_SELECTOR)
+
+        self.assert_field_validation_required(parent=pagination_size_elem)