Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/system/src/PhpStorage/MockPhpStorage.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\PhpStorage\MockPhpStorage.
+ */
+
+namespace Drupal\system\PhpStorage;
+
+/**
+ * Mock PHP storage class used for testing.
+ */
+class MockPhpStorage {
+
+  /**
+   * The storage configuration.
+   *
+   * @var array
+   */
+  protected $configuration;
+
+  /**
+   * Constructs a MockPhpStorage object.
+   *
+   * @param array $configuration
+   */
+  public function __construct(array $configuration) {
+    $this->configuration = $configuration;
+  }
+
+  /**
+   * Gets the configuration data.
+   */
+  public function getConfiguration() {
+    return $this->configuration;
+  }
+
+  /**
+   * Gets a single configuration key.
+   */
+  public function getConfigurationValue($key) {
+    return isset($this->configuration[$key]) ? $this->configuration[$key] : NULL;
+  }
+
+}