Initial

tests/_support/Services.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter;
+
+use CIUnitTestCase;
+use Config\Services as ConfigServices;
+
+/**
+ * Services class for testing.
+ */
+class Services
+{
+    /**
+     * Mock objects for testing which are returned if exist.
+     *
+     * @var array
+     */
+    protected static $mocks = [];
+
+    /**
+     * Reset shared instances and mocks for testing.
+     */
+    public static function reset()
+    {
+        static::$mocks = [];
+
+        CIUnitTestCase::setPrivateProperty(ConfigServices::class, 'instances', []);
+    }
+
+    /**
+     * Inject mock object for testing.
+     *
+     * @param $mock
+     */
+    public static function injectMock(string $name, $mock)
+    {
+        $name                 = strtolower($name);
+        static::$mocks[$name] = $mock;
+    }
+
+    /**
+     * Returns a service
+     */
+    public static function __callStatic(string $name, array $arguments)
+    {
+        $name = strtolower($name);
+
+        // Returns mock if exists
+        if (isset(static::$mocks[$name])) {
+            return static::$mocks[$name];
+        }
+
+        if (method_exists(ConfigServices::class, $name)) {
+            return ConfigServices::$name(...$arguments);
+        }
+    }
+}