Restore autoload for tests in autoload.php

lib/autoload.php

@@ -7,9 +7,20 @@ spl_autoload_register(function ($class) {
      */
     $class = str_replace('\\', '/', $class);
 
-    // Check under the current directory
+    /* First, check under the current directory. It is important that
+     * we look here first, so that we don't waste time searching for
+     * test classes in the common case.
+     */
     $path = dirname(__FILE__).'/'.$class.'.php';
     if (file_exists($path)) {
         require_once $path;
     }
+
+    /* If we didn't find what we're looking for already, maybe it's
+     * a test class?
+     */
+    $path = dirname(__FILE__).'/../test/'.$class.'.php';
+    if (file_exists($path)) {
+        require_once $path;
+    }
 });

phpunit.xml.dist

@@ -9,7 +9,7 @@
          processIsolation="false"
          stopOnFailure="false"
          syntaxCheck="false"
-         bootstrap="vendor/autoload.php"
+         bootstrap="lib/autoload.php"
 >
     <testsuites>
         <testsuite name="php-redmine-api Test Suite">