First commit

sites/all/modules/civicrm/Civi/Test/CiviEnvBuilder/CallbackStep.php

@@ -0,0 +1,29 @@
+<?php
+namespace Civi\Test\CiviEnvBuilder;
+class CallbackStep implements StepInterface {
+  private $callback;
+  private $sig;
+
+  /**
+   * CallbackStep constructor.
+   * @param $callback
+   * @param $sig
+   */
+  public function __construct($callback, $sig = NULL) {
+    $this->callback = $callback;
+    $this->sig = $sig === NULL ? md5(var_export($callback, 1)) : $sig;
+  }
+
+  public function getSig() {
+    return $this->sig;
+  }
+
+  public function isValid() {
+    return is_callable($this->callback);
+  }
+
+  public function run($ctx) {
+    call_user_func($this->callback, $ctx);
+  }
+
+}