Add methods to install and uninstall modules

src/Drupal/Driver/BaseDriver.php

@@ -174,4 +174,18 @@ public function entityDelete($entity_type, $entity) {
     throw new UnsupportedDriverActionException($this->errorString('delete entities using the generic Entity API'), $this);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleInstall($module_name) {
+    throw new UnsupportedDriverActionException($this->errorString('install modules'), $this);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleUninstall($module_name) {
+    throw new UnsupportedDriverActionException($this->errorString('uninstall modules'), $this);
+  }
+
 }

src/Drupal/Driver/Cores/CoreInterface.php

@@ -236,4 +236,20 @@ public function entityCreate($entity_type, $entity);
    */
   public function entityDelete($entity_type, $entity);
 
+  /**
+   * Installs a module.
+   *
+   * @param string $module_name
+   *   The machine name of the module to install.
+   */
+  public function moduleInstall($module_name);
+
+  /**
+   * Uninstalls a module.
+   *
+   * @param string $module_name
+   *   The machine name of the module to uninstall.
+   */
+  public function moduleUninstall($module_name);
+
 }

src/Drupal/Driver/Cores/Drupal6.php

@@ -513,4 +513,19 @@ public function entityDelete($entity_type, $entity) {
     throw new \Exception('Drupal 6 does not have a generic Entity API, so deletion of entities is not possible in this way.');
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleInstall($module_name) {
+    module_enable(array($module_name));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleUninstall($module_name) {
+    module_disable(array($module_name));
+    drupal_uninstall_module(array($module_name));
+  }
+
 }

src/Drupal/Driver/Cores/Drupal7.php

@@ -498,4 +498,19 @@ public function entityDelete($entity_type, $entity) {
     throw new \Exception('Deletion of entities via the generic Entity API is not yet implemented for Drupal 7.');
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleInstall($module_name) {
+    module_enable(array($module_name));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleUninstall($module_name) {
+    module_disable(array($module_name));
+    drupal_uninstall_modules(array($module_name));
+  }
+
 }

src/Drupal/Driver/Cores/Drupal8.php

@@ -3,6 +3,7 @@
 namespace Drupal\Driver\Cores;
 
 use Drupal\Core\DrupalKernel;
+use Drupal\Core\Site\Settings;
 use Drupal\Driver\Exception\BootstrapException;
 use Drupal\field\Entity\FieldStorageConfig;
 use Drupal\language\Entity\ConfigurableLanguage;
@@ -470,4 +471,23 @@ public function entityDelete($entity_type, $entity) {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleInstall($module_name) {
+    // Scan test directories for modules.
+    $settings = Settings::getAll();
+    $settings['extension_discovery_scan_tests'] = TRUE;
+    new Settings($settings);
+
+    \Drupal::service('module_installer')->install(array($module_name));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleUninstall($module_name) {
+    \Drupal::service('module_installer')->uninstall(array($module_name));
+  }
+
 }

src/Drupal/Driver/DriverInterface.php

@@ -178,4 +178,20 @@ public function configGet($name, $key);
    */
   public function configSet($name, $key, $value);
 
+  /**
+   * Installs a module.
+   *
+   * @param string $module_name
+   *   The machine name of the module to install.
+   */
+  public function moduleInstall($module_name);
+
+  /**
+   * Uninstalls a module.
+   *
+   * @param string $module_name
+   *   The machine name of the module to uninstall.
+   */
+  public function moduleUninstall($module_name);
+
 }

src/Drupal/Driver/DrupalDriver.php

@@ -333,4 +333,18 @@ public function entityDelete($entity_type, $entity) {
     return $this->getCore()->entityDelete($entity_type, $entity);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleInstall($module_name) {
+    $this->getCore()->moduleInstall($module_name);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleUninstall($module_name) {
+    $this->getCore()->moduleUninstall($module_name);
+  }
+
 }

src/Drupal/Driver/DrushDriver.php

@@ -386,6 +386,20 @@ public function runCron() {
     $this->drush('cron');
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleInstall($module_name) {
+    $this->drush('pm-enable', array($module_name), array('yes' => TRUE));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function moduleUninstall($module_name) {
+    $this->drush('pm-uninstall', array($module_name), array('yes' => TRUE));
+  }
+
   /**
    * Run Drush commands dynamically from a DrupalContext.
    */