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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  namespace core_xapi\external;
  18  
  19  use core_xapi\xapi_exception;
  20  use core_xapi\local\statement\item_agent;
  21  use externallib_advanced_testcase;
  22  use core_external\external_api;
  23  use core_xapi\iri;
  24  use core_xapi\local\state;
  25  use core_xapi\local\statement\item_activity;
  26  use core_xapi\test_helper;
  27  
  28  defined('MOODLE_INTERNAL') || die();
  29  
  30  global $CFG;
  31  require_once($CFG->dirroot . '/webservice/tests/helpers.php');
  32  
  33  /**
  34   * Unit tests for xAPI delete state webservice.
  35   *
  36   * @package    core_xapi
  37   * @covers     \core_xapi\external\delete_state
  38   * @since      Moodle 4.2
  39   * @copyright  2023 Sara Arjona (sara@moodle.com)
  40   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  41   */
  42  class delete_state_test extends externallib_advanced_testcase {
  43  
  44      /**
  45       * Setup to ensure that fixtures are loaded.
  46       */
  47      public static function setUpBeforeClass(): void {
  48          global $CFG;
  49          require_once($CFG->dirroot . '/lib/xapi/tests/helper.php');
  50      }
  51  
  52      /**
  53       * Testing different component names on valid states.
  54       *
  55       * @dataProvider components_provider
  56       * @param string $component component name
  57       * @param string|null $expected expected results
  58       */
  59      public function test_component_names(string $component, ?string $expected): void {
  60  
  61          $this->resetAfterTest();
  62  
  63          // Scenario.
  64          $this->setAdminUser();
  65  
  66          // Perform test.
  67          $data = test_helper::create_state([], true);
  68          $this->delete_state_data($component, $data, $expected);
  69      }
  70  
  71      /**
  72       * Data provider for the test_component_names tests.
  73       *
  74       * @return  array
  75       */
  76      public function components_provider() : array {
  77          return [
  78              'Inexistent component' => [
  79                  'component' => 'inexistent_component',
  80                  'expected' => null,
  81              ],
  82              'Compatible component' => [
  83                  'component' => 'fake_component',
  84                  'expected' => 'true',
  85              ],
  86              'Incompatible component' => [
  87                  'component' => 'core_xapi',
  88                  'expected' => null,
  89              ],
  90          ];
  91      }
  92  
  93      /**
  94       * Testing invalid agent.
  95       *
  96       */
  97      public function test_invalid_agent(): void {
  98          $this->resetAfterTest();
  99  
 100          // Scenario.
 101          $this->setAdminUser();
 102          $other = $this->getDataGenerator()->create_user();
 103  
 104          // Invalid agent (use different user, instead of the current one).
 105          $info = [
 106              'agent' => item_agent::create_from_user($other),
 107          ];
 108          $data = test_helper::create_state($info, true);
 109          $this->delete_state_data('fake_component', $data, null);
 110      }
 111  
 112      /**
 113       * Testing valid/invalid state.
 114       *
 115       * @dataProvider states_provider
 116       * @param array $info array of overriden state data.
 117       * @param string|null $expected Expected results.
 118       * @return void
 119       */
 120      public function test_delete_state(array $info, ?string $expected): void {
 121          $this->resetAfterTest();
 122  
 123          // Scenario.
 124          $this->setAdminUser();
 125          $component = $info['component'] ?? 'fake_component';
 126          $params = [];
 127          if ($component === 'mod_h5pactivity') {
 128              // For the mod_h5pactivity component, the activity needs to be created too.
 129              $course = $this->getDataGenerator()->create_course();
 130              $user = $this->getDataGenerator()->create_and_enrol($course, 'student');
 131              $activity = $this->getDataGenerator()->create_module('h5pactivity', ['course' => $course]);
 132  
 133              $activitycontext = \context_module::instance($activity->cmid);
 134              $info['activity'] = item_activity::create_from_id($activitycontext->id);
 135              $params['activity'] = $info['activity'];
 136              $this->setUser($user);
 137          }
 138  
 139          // Add, at least, one xAPI state record to database (with the default values).
 140          test_helper::create_state($params, true);
 141  
 142          // Perform test.
 143          $data = test_helper::create_state($info);
 144  
 145          $this->delete_state_data($component, $data, $expected);
 146      }
 147  
 148      /**
 149       * Data provider for the test_get_state tests.
 150       *
 151       * @return array
 152       */
 153      public function states_provider() : array {
 154          return [
 155              'Existing and valid state' => [
 156                  'info' => [],
 157                  'expected' => 'true',
 158              ],
 159              'No state (wrong activityid)' => [
 160                  'info' => ['activity' => item_activity::create_from_id('1')],
 161                  'expected' => 'false',
 162              ],
 163              'No state (wrong stateid)' => [
 164                  'info' => ['stateid' => 'food'],
 165                  'expected' => 'false',
 166              ],
 167              'No state (wrong component)' => [
 168                  'info' => ['component' => 'mod_h5pactivity'],
 169                  'expected' => 'false',
 170              ],
 171          ];
 172      }
 173  
 174      /**
 175       * Return a xAPI external webservice class to operate.
 176       *
 177       * The test needs to fake a component in order to test without
 178       * using a real one. This way if in the future any component
 179       * implement it's xAPI handler this test will continue working.
 180       *
 181       * @return delete_state the external class
 182       */
 183      private function get_external_class(): delete_state {
 184          $ws = new class extends delete_state {
 185              /**
 186               * Method to override validate_component.
 187               *
 188               * @param string $component  The component name in frankenstyle.
 189               */
 190              protected static function validate_component(string $component): void {
 191                  if ($component != 'fake_component') {
 192                      parent::validate_component($component);
 193                  }
 194              }
 195          };
 196          return $ws;
 197      }
 198  
 199      /**
 200       * This function do all checks from a standard delete_state request.
 201       *
 202       * The reason for this function is because states crafting (special in error
 203       * scenarios) is complicated to do via data providers because every test need a specific
 204       * testing conditions. For this reason alls tests creates a scenario and then uses this
 205       * function to check the results.
 206       *
 207       * @param string $component component name
 208       * @param state $data data to encode and send to delete_state
 209       * @param string $expected expected results (if null an exception is expected)
 210       */
 211      private function delete_state_data(string $component, state $data, ?string $expected): void {
 212          global $DB;
 213  
 214          // Get current states in database.
 215          $currentstates = $DB->count_records('xapi_states');
 216  
 217          // When no result is expected, an exception will be incurred.
 218          if (is_null($expected)) {
 219              $this->expectException(xapi_exception::class);
 220          }
 221  
 222          $external = $this->get_external_class();
 223          $result = $external::execute(
 224              $component,
 225              iri::generate($data->get_activity_id(), 'activity'),
 226              json_encode($data->get_agent()),
 227              $data->get_state_id(),
 228              $data->get_registration()
 229          );
 230          $result = external_api::clean_returnvalue($external::execute_returns(), $result);
 231  
 232          // Check the state has been removed.
 233          $records = $DB->get_records('xapi_states');
 234          $this->assertTrue($result);
 235          if ($expected === 'true') {
 236              $this->assertCount($currentstates - 1, $records);
 237          } else if ($expected === 'false') {
 238              $this->assertCount($currentstates, $records);
 239          }
 240      }
 241  }