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

The Learning plans block should be added only if the competencies
advanced feature is enabled.

blocks/lp/block_lp.php

@@ -81,4 +81,13 @@ public function get_content() {
         return $this->content;
     }
 
+    /**
+     * This block shouldn't be added to a page if the competencies advanced feature is disabled.
+     *
+     * @param moodle_page $page
+     * @return bool
+     */
+    public function can_block_be_added(moodle_page $page): bool {
+        return get_config('core_competency', 'enabled');
+    }
 }

blocks/lp/tests/lp_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_lp\tests;
+
+use advanced_testcase;
+use block_lp;
+use context_course;
+
+/**
+ * PHPUnit block_lp tests
+ *
+ * @package    block_lp
+ * @category   test
+ * @copyright  2021 Sara Arjona (sara@moodle.com)
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @coversDefaultClass \block_lp
+ */
+class lp_test extends advanced_testcase {
+    public static function setUpBeforeClass(): void {
+        require_once(__DIR__ . '/../../moodleblock.class.php');
+        require_once(__DIR__ . '/../block_lp.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_lp();
+
+        // If blogs advanced feature is enabled, the method should return true.
+        set_config('enabled', true, 'core_competency');
+        $this->assertTrue($block->can_block_be_added($page));
+
+        // However, if the blogs advanced feature is disabled, the method should return false.
+        set_config('enabled', false, 'core_competency');
+        $this->assertFalse($block->can_block_be_added($page));
+    }
+}