first commit

core/tests/Drupal/TestSite/TestPreinstallInterface.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\TestSite;
+
+/**
+ * Allows running code prior to a test site install.
+ *
+ * @see \Drupal\TestSite\Commands\TestSiteInstallCommand
+ */
+interface TestPreinstallInterface {
+
+  /**
+   * Runs code prior to a test site install.
+   *
+   * This method is run after FunctionalTestSetupTrait::prepareEnvironment()
+   * but before Drupal is installed. As such, there is limited setup of the
+   * environment and no Drupal API is available.
+   *
+   * @param string $db_prefix
+   *   The database prefix.
+   * @param string $site_directory
+   *   The site directory.
+   *
+   * @see \Drupal\TestSite\TestSiteInstallTestScript
+   */
+  public function preinstall($db_prefix, $site_directory);
+
+}