MDL-73339 badges: Add block only if main feature is enabled

The Latest badges block should be added only if the badges
advanced feature is enabled.

blocks/badges/block_badges.php

@@ -22,17 +22,13 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  * @author     Yuliya Bozhko <yuliya.bozhko@totaralms.com>
  */
-
-defined('MOODLE_INTERNAL') || die();
-
-require_once($CFG->libdir . "/badgeslib.php");
-
-/**
- * Displays recent badges
- */
 class block_badges extends block_base {
 
     public function init() {
+        global $CFG;
+
+        require_once($CFG->libdir . "/badgeslib.php");
+
         $this->title = get_string('pluginname', 'block_badges');
     }
 
@@ -105,4 +101,16 @@ public function get_content() {
 
         return $this->content;
     }
+
+    /**
+     * This block shouldn't be added to a page if the badges advanced feature is disabled.
+     *
+     * @param moodle_page $page
+     * @return bool
+     */
+    public function can_block_be_added(moodle_page $page): bool {
+        global $CFG;
+
+        return $CFG->enablebadges;
+    }
 }

blocks/badges/tests/badges_test.php

@@ -0,0 +1,63 @@
+<?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/>.
+
+namespace block_badges\tests;
+
+use advanced_testcase;
+use block_badges;
+use context_course;
+
+/**
+ * PHPUnit block_badges tests
+ *
+ * @package    block_badges
+ * @category   test
+ * @copyright  2021 Sara Arjona (sara@moodle.com)
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @coversDefaultClass \block_badges
+ */
+class badges_test extends advanced_testcase {
+    public static function setUpBeforeClass(): void {
+        require_once(__DIR__ . '/../../moodleblock.class.php');
+        require_once(__DIR__ . '/../block_badges.php');
+    }
+
+    /**
+     * Test the behaviour of can_block_be_added() method.
+     *
+     * @covers ::can_block_be_added
+     */
+    public function test_can_block_be_added(): void {
+        $this->resetAfterTest();
+        $this->setAdminUser();
+
+        // Create a course and prepare the page where the block will be added.
+        $course = $this->getDataGenerator()->create_course();
+        $page = new \moodle_page();
+        $page->set_context(context_course::instance($course->id));
+        $page->set_pagelayout('course');
+
+        $block = new block_badges();
+
+        // If badges advanced feature is enabled, the method should return true.
+        set_config('enablebadges', true);
+        $this->assertTrue($block->can_block_be_added($page));
+
+        // However, if the badges advanced feature is disabled, the method should return false.
+        set_config('enablebadges', false);
+        $this->assertFalse($block->can_block_be_added($page));
+    }
+}

blocks/badges/tests/behat/block_badges.feature

@@ -16,13 +16,12 @@ Feature: Enable Block Badges in a course without badges
       | teacher1 | C1 | editingteacher |
 
   Scenario: Add the block to a the course when badges are disabled
-    Given I log in as "admin"
-    And the following config values are set as admin:
-      | enablebadges | 0 |
-    And I log out
-    And I log in as "teacher1"
+    Given I log in as "teacher1"
     And I am on "Course 1" course homepage with editing mode on
     When I add the "Latest badges" block
+    And the following config values are set as admin:
+      | enablebadges | 0 |
+    And I reload the page
     Then I should see "Badges are not enabled on this site." in the "Latest badges" "block"
 
   Scenario: Add the block to a the course when badges are enabled