MDL-29571 questions: improve class=accesshide screen-reader hints.

This changes the hint that comes before the question text. There are
unit tests to verify the new behaviour.

(amended to fix comments)

question/engine/renderer.php

@@ -77,16 +77,16 @@ public function question(question_attempt $qa, qbehaviour_renderer $behaviourout
         $output .= html_writer::start_tag('div', array('class' => 'content'));
 
         $output .= html_writer::tag('div',
-                $this->add_part_heading(get_string('questiontext', 'question'),
-                $this->formulation($qa, $behaviouroutput, $qtoutput, $options)),
+                $this->add_part_heading($qtoutput->formulation_heading(),
+                    $this->formulation($qa, $behaviouroutput, $qtoutput, $options)),
                 array('class' => 'formulation'));
         $output .= html_writer::nonempty_tag('div',
                 $this->add_part_heading(get_string('feedback', 'question'),
-                $this->outcome($qa, $behaviouroutput, $qtoutput, $options)),
+                    $this->outcome($qa, $behaviouroutput, $qtoutput, $options)),
                 array('class' => 'outcome'));
         $output .= html_writer::nonempty_tag('div',
                 $this->add_part_heading(get_string('comments', 'question'),
-                $this->manual_comment($qa, $behaviouroutput, $qtoutput, $options)),
+                    $this->manual_comment($qa, $behaviouroutput, $qtoutput, $options)),
                 array('class' => 'comment'));
         $output .= html_writer::nonempty_tag('div',
                 $this->response_history($qa, $behaviouroutput, $qtoutput, $options),

question/type/description/lang/en/qtype_description.php

@@ -30,3 +30,4 @@
 The question text is displayed both during the attempt and on the review page. Any general feedback is displayed on the review page only.';
 $string['descriptionsummary'] = 'This is not actually a question. Instead it is a way to add some instructions, rubric or other content to the activity. This is similar to the way that labels can be used to add content to the course page.';
 $string['editingdescription'] = 'Editing a Description';
+$string['informationtext'] = 'Information text';

question/type/description/renderer.php

@@ -40,4 +40,8 @@ public function formulation_and_controls(question_attempt $qa,
         return html_writer::tag('div', $qa->get_question()->format_questiontext($qa),
                 array('class' => 'qtext'));
     }
+
+    public function formulation_heading() {
+        return get_string('informationtext', 'qtype_description');
+    }
 }

question/type/description/simpletest/testwalkthrough.php

@@ -0,0 +1,52 @@
+<?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/>.
+
+/**
+ * This file contains tests that walks a description question through its interaction model.
+ *
+ * @package    qtype
+ * @subpackage description
+ * @copyright  2011 The Open University
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+
+defined('MOODLE_INTERNAL') || die();
+
+require_once($CFG->libdir . '/questionlib.php');
+require_once($CFG->dirroot . '/question/engine/simpletest/helpers.php');
+
+
+class qtype_description_walkthrough_test extends qbehaviour_walkthrough_test_base {
+
+    public function test_informationitem_feedback_description() {
+
+        // Create a description question.
+        $description = test_question_maker::make_question('description');
+        $this->start_attempt_at_question($description, 'deferredfeedback');
+
+        // Check the initial state.
+        $this->assertEqual('informationitem',
+                $this->quba->get_question_attempt($this->slot)->get_behaviour_name());
+
+        $this->check_current_output(
+                new ContainsTagWithContents('h3', get_string('informationtext', 'qtype_description'))
+        );
+
+        // Further tests of the description qtype are in
+        // question/behaviour/informationitem/simpletest/testwalkthrough.php.
+    }
+}

question/type/rendererbase.php

@@ -49,6 +49,16 @@ public function formulation_and_controls(question_attempt $qa,
         return $qa->get_question()->format_questiontext($qa);
     }
 
+    /**
+     * In the question output there are some class="accesshide" headers to help
+     * screen-readers. This method returns the text to use for the heading above
+     * the formulation_and_controls section.
+     * @return string to use as the heading.
+     */
+    public function formulation_heading() {
+        return get_string('questiontext', 'question');
+    }
+
     /**
      * Output hidden form fields to clear any wrong parts of the student's response.
      *

question/type/truefalse/simpletest/testwalkthrough.php

@@ -48,7 +48,9 @@ public function test_false_right_does_not_show_feedback_when_not_answered() {
         $this->check_current_mark(null);
         $this->check_current_output(
                 $this->get_contains_question_text_expectation($tf),
-                $this->get_does_not_contain_feedback_expectation());
+                $this->get_does_not_contain_feedback_expectation(),
+                new ContainsTagWithContents('h3',
+                        get_string('questiontext', 'question')));
         $this->assertEqual(get_string('false', 'qtype_truefalse'),
                 $this->quba->get_right_answer_summary($this->slot));
         $this->assertPattern('/' . preg_quote($tf->questiontext) . '/',