MDL-38823 behat: New behat_form_radio

To deal with radio inputs after allowing
behat_form_field to delegate in specific
fields managers. It also fixes a BIG issue
when calling a no required class.

lib/behat/form_field/behat_form_field.php

@@ -126,8 +126,7 @@ class behat_form_field {
                     $classname = 'behat_form_checkbox';
                     break;
                 case 'radio':
-                    // Behaves the same way.
+                    $classname = 'behat_form_radio';
-                    $classname = 'behat_form_checkbox';
                     break;
                 default:
                     return false;
@@ -140,6 +139,7 @@ class behat_form_field {
         }
 
         $classpath = $CFG->dirroot . '/lib/behat/form_field/' . $classname . '.php';
+        require_once($classpath);
         return new $classname($this->session, $this->field);
     }
 

lib/behat/form_field/behat_form_radio.php

@@ -0,0 +1,59 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Radio input form element.
+ *
+ * @package    core_form
+ * @category   test
+ * @copyright  2013 David Monllaó
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+// NOTE: no MOODLE_INTERNAL test here, this file may be required by behat before including /config.php.
+
+require_once(__DIR__  . '/behat_form_checkbox.php');
+
+/**
+ * Radio input form field.
+ *
+ * Extends behat_form_checkbox as the set_value() behaviour
+ * is the same.
+ *
+ * This form field type can be added to forms as any other
+ * moodle form element, but it does not make sense without
+ * a group of radio inputs, so is hard to find it alone and
+ * detect it by behat_form_manager::get_field(), where is useful
+ * is when the default behat_form_field class is being used, it
+ * finds a input[type=radio] and it delegates set_value() and
+ * get_value() to behat_form_radio.
+ *
+ * @package    core_form
+ * @category   test
+ * @copyright  2013 David Monllaó
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class behat_form_radio extends behat_form_checkbox {
+
+    /**
+     * Returns the radio input value attribute.
+     *
+     * @return string The value attribute
+     */
+    public function get_value() {
+        return $this->field->getValue();
+    }
+}