MDL-43730 mod_book: Automate MDLQA-2426

Behat feature to make sure show/hide feature for book chapter works as expected

mod/book/tests/behat/show_hide_chapters.feature

+@mod @mod_book
+Feature: Book activity chapter visibility management
+  In order to properly manage chapters in a book activity
+  As a teacher
+  I need to be able to show or hide chapters.
+
+  Background:
+    Given the following "courses" exist:
+      | fullname | shortname | category | groupmode |
+      | Course 1 | C1 | 0 | 1 |
+    And the following "users" exist:
+      | username | firstname | lastname | email |
+      | teacher1 | Teacher | 1 | teacher1@asd.com |
+    And the following "course enrolments" exist:
+      | user | course | role |
+      | teacher1 | C1 | editingteacher |
+    And I log in as "teacher1"
+    And I follow "Course 1"
+    And I turn editing mode on
+    And I add a "Book" to section "1" and I fill the form with:
+      | Name | Test book |
+      | Description | A book about dreams! |
+    And I follow "Test book"
+    And I set the following fields to these values:
+      | Chapter title | First chapter |
+      | Content | First chapter |
+    And I press "Save changes"
+    And I click on "a[href*='pagenum=1']" "css_element"
+    And I set the following fields to these values:
+      | Chapter title | Second chapter |
+      | Content | Second chapter |
+    And I press "Save changes"
+    And I click on "a[href*='pagenum=2']" "css_element"
+    And I set the following fields to these values:
+      | Chapter title | Sub chapter |
+      | subchapter | 1 |
+      | Content | Sub chapter |
+    And I press "Save changes"
+    And I click on "a[href*='pagenum=3']" "css_element"
+    And I set the following fields to these values:
+      | Chapter title | Third chapter |
+      | subchapter | 0 |
+      | Content | Third chapter |
+    And I press "Save changes"
+    And I click on "a[href*='pagenum=4']" "css_element"
+    And I set the following fields to these values:
+      | Chapter title | Fourth chapter |
+      | Content | Fourth chapter |
+    And I press "Save changes"
+
+  @javascript
+  Scenario: Show/hide chapters and subchapters
+    When I follow "Hide chapter \"2 Second chapter\""
+    And I follow "Hide chapter \"2 Third chapter\""
+    And I follow "Turn editing off"
+    And I am on homepage
+    And I follow "Course 1"
+    And I follow "Test book"
+    Then I should not see "Second chapter" in the "Table of contents" "block"
+    And I should not see "Third chapter" in the "Table of contents" "block"
+    And I follow "Next"
+    And I should see "Fourth chapter" in the ".book_content" "css_element"
+    And I follow "Exit book"
+    And I follow "Test book"
+    And I should see "First chapter" in the ".book_content" "css_element"
+    And I follow "Turn editing on"
+    And I follow "Next"
+    And I should see "Second chapter" in the ".book_content" "css_element"
+    And I should not see "Exit book"
+    And I follow "Next"
+    And I should see "Sub chapter" in the ".book_content" "css_element"
+    And I follow "Next"
+    And I should see "Third chapter" in the ".book_content" "css_element"
+    And I follow "Next"
+    And I should see "Fourth chapter" in the ".book_content" "css_element"
+    And I follow "Exit book"
+