[Components] Tests/Autoloading fixes

* Switched to Composer to manage "dev" dependencies
* Fixed READMEs
* Excluded vendor in phpunit.xml.dist files
* Fixed message in bootstrap.php files
* Added autoloader for the component itself

Author: willdurand

.gitignore

@@ -0,0 +1,2 @@
+vendor/
+composer.lock

README.md

@@ -64,10 +64,9 @@ Resources
 
 You can run the unit tests with the following command:
 
-    phpunit -c src/Symfony/Component/ClassLoader/
+    phpunit
 
 If you also want to run the unit tests that depend on other Symfony
-Components, declare the following environment variables before running
-PHPUnit:
+Components, install dev dependencies before running PHPUnit:
 
-    export SYMFONY_FINDER=../path/to/Finder
+    php composer.phar install --dev

Tests/bootstrap.php

@@ -10,19 +10,13 @@
  */
 
 spl_autoload_register(function ($class) {
-    foreach (array(
-        'SYMFONY_FINDER' => 'Finder',
-    ) as $env => $name) {
-        if (isset($_SERVER[$env]) && 0 === strpos(ltrim($class, '/'), 'Symfony\Component\\'.$name)) {
-            if (file_exists($file = $_SERVER[$env].'/'.substr(str_replace('\\', '/', $class), strlen('Symfony\Component\\'.$name)).'.php')) {
-                require_once $file;
-            }
-        }
-    }
-
     if (0 === strpos(ltrim($class, '/'), 'Symfony\Component\ClassLoader')) {
         if (file_exists($file = __DIR__.'/../'.substr(str_replace('\\', '/', $class), strlen('Symfony\Component\ClassLoader')).'.php')) {
             require_once $file;
         }
     }
 });
+
+if (file_exists($loader = __DIR__.'/../vendor/autoload.php')) {
+    require_once $loader;
+}

composer.json

@@ -18,6 +18,9 @@
     "require": {
         "php": ">=5.3.2"
     },
+    "require-dev": {
+        "symfony/finder": "2.1.*"
+    },
     "autoload": {
         "psr-0": { "Symfony\\Component\\ClassLoader": "" }
     },

phpunit.xml.dist

@@ -23,6 +23,7 @@
             <exclude>
                 <directory>./Resources</directory>
                 <directory>./Tests</directory>
+                <directory>./vendor</directory>
             </exclude>
         </whitelist>
     </filter>