Implementation for #371.

Author: Roman Syroeshko

CHANGELOG.md

@@ -9,6 +9,7 @@ This is the changelog between releases of PHPWord. Releases are listed in revers
 Place announcement text here.
 
 ### Changes
+- Improved error message for the case when ``autoload.php`` is not found. - @RomanSyroeshko #371
 - Changed visibility of all private properties and methods of ``TemplateProcessor`` to ``protected``. - RomanSyroeshko #498
 - Improved performance of ``TemplateProcessor::setValue()``. - @RomanSyroeshko #513
 - Renamed ``align`` option of ``Paragraph`` style into ``alignment``. Note: accessor and mutator methods are renamed too. - @RomanSyroeshko

tests/bootstrap.php

@@ -22,11 +22,16 @@
     define('PHPWORD_TESTS_BASE_DIR', realpath(__DIR__));
 }
 
-$vendor = realpath(__DIR__ . '/../vendor');
-if (file_exists($vendor . '/autoload.php')) {
-    require $vendor . '/autoload.php';
+$vendorDirPath = realpath(__DIR__ . '/../vendor');
+if (file_exists($vendorDirPath . '/autoload.php')) {
+    require $vendorDirPath . '/autoload.php';
 } else {
-    throw new Exception('Unable to load dependencies');
+    throw new Exception(
+        sprintf(
+            'Could not find file \'%s\'. It is generated by Composer. Use \'install\' or \'update\' Composer commands to move forward.',
+            $vendorDirPath . '/autoload.php'
+        )
+    );
 }
 
 spl_autoload_register(function ($class) {