MDL-38957 behat: New test

According to MDLQA-94, a teacher can
sort questions in the question bank.

question/tests/behat/sort_questions.feature

@@ -0,0 +1,53 @@
+@core_question
+Feature: A teacher can sort questions in the question bank
+  In order to order the question bank's questions
+  As a teacher
+  I need to sort the questions list using different sort orders
+
+  @javascript
+  Scenario: Sort using question name, question type and created by sort order links
+    Given the following "users" exists:
+      | username | firstname | lastname | email |
+      | teacher1 | Teacher | 1 | teacher1@asd.com |
+    And the following "courses" exists:
+      | fullname | shortname | format |
+      | Course 1 | C1 | weeks |
+    And the following "course enrolments" exists:
+      | user | course | role |
+      | teacher1 | C1 | editingteacher |
+    And I log in as "admin"
+    And I follow "Course 1"
+    And I add a "Essay" question filling the form with:
+      | Question name | A question 1 name |
+      | Question text | A question 1 text |
+    And I log out
+    And I log in as "teacher1"
+    And I follow "Course 1"
+    And I add a "Essay" question filling the form with:
+      | Question name | B question 2 name |
+      | Question text | B question 2 text |
+    And I add a "Numerical" question filling the form with:
+      | Question name | C question 3 name |
+      | Question text | C question 3 text |
+      | answer[0] | 2 |
+      | fraction[0] | 100% |
+      | answer[1] | 1 |
+      | fraction[1] | None |
+    When I follow "Sort by Question ascending"
+    Then "A question 1 name" "checkbox" should appear before "B question 2 name" "checkbox"
+    And "B question 2 name" "checkbox" should appear before "C question 3 name" "checkbox"
+    And I follow "Sort by Question descending"
+    And "C question 3 name" "checkbox" should appear before "B question 2 name" "checkbox"
+    And "B question 2 name" "checkbox" should appear before "A question 1 name" "checkbox"
+    And I follow "Sort by Question type ascending"
+    And "A question 1 name" "checkbox" should appear before "C question 3 name" "checkbox"
+    And I follow "Sort by Question type descending"
+    And "C question 3 name" "checkbox" should appear before "A question 1 name" "checkbox"
+    And I follow "Sort by First name ascending"
+    And "A question 1 name" "checkbox" should appear before "B question 2 name" "checkbox"
+    And I follow "Sort by First name descending"
+    And "B question 2 name" "checkbox" should appear before "A question 1 name" "checkbox"
+    And I click on "Show question text in the question list" "checkbox"
+    And I should see "A question 1 text"
+    And I should see "B question 2 text"
+    And I should see "C question 3 text"