first commit

class/class.MockingTrait.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * Created by PhpStorm.
+ * User: filip
+ * Date: 9/29/16
+ * Time: 10:56 AM.
+ */
+
+/**
+ * Trait MockingTrait.
+ *
+ * Extend a class you want to mock, override desired methods with body: `return $this->call(__FUNCTION__, func_get_args());`
+ * Then just configure what you want to really override at runtime by setting callback via self::mock()
+ * If no callback is provided vis self::mock(), parent method is called.
+ */
+trait MockingTrait
+{
+    private $methodMocks = [];
+
+    public function mock($methodName, callable $methodBody)
+    {
+        if (!method_exists($this, $methodName)) {
+            throw new \LogicException("Method '{$methodName}' does not exist on this object.");
+        }
+        $this->methodMocks[$methodName] = $methodBody;
+    }
+
+    private function call($methodName, $args)
+    {
+        if (isset($this->methodMocks[$methodName])) {
+            return call_user_func_array($this->methodMocks[$methodName], $args);
+        }
+
+        return call_user_func_array("parent::{$methodName}", $args);
+    }
+}