minor #13199 [Debug] split tests for deprecated interfaces (nicolas-g…

…rekas)

This PR was merged into the 2.6 branch.

Discussion
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[Debug] split tests for deprecated interfaces

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Splitting tests for deprecated interfaces in "Legacy" prefixed test classes/methods should be done for every component.
Let's start by this simple one. To anyone: help welcomed for the other components.

Commits
-------

3a18cc6 [Debug] split tests for deprecated interfaces

src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php

@@ -23,22 +23,6 @@
  */
 class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
 {
-    /**
-     * @var int Error reporting level before running tests.
-     */
-    protected $errorReporting;
-
-    public function setUp()
-    {
-        $this->errorReporting = error_reporting(E_ALL | E_STRICT);
-        $this->iniSet('display_errors', '1');
-    }
-
-    public function tearDown()
-    {
-        error_reporting($this->errorReporting);
-    }
-
     public function testRegister()
     {
         $handler = ErrorHandler::register();
@@ -373,8 +357,10 @@ public function testHandleFatalError()
         }
     }
 
-    public function testDeprecatedInterface()
+    public function testLegacyInterface()
     {
+        $this->iniSet('error_reporting', -1 & ~E_USER_DEPRECATED);
+
         try {
             $handler = ErrorHandler::register(0);
             $this->assertFalse($handler->handle(0, 'foo', 'foo.php', 12, array()));