minor #19169 Add test for Definition with exeption InvalidArgument (IvanMenshykov)

This PR was squashed before being merged into the 3.2-dev branch (closes #19169).

Discussion
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Add test for Definition with exeption InvalidArgument

Add test for Definition with exeption InvalidArgument

| Q             | A
| ------------- | ---
| Branch?       | "master" for new features / 2.7, 2.8, 3.0 or 3.1 for fixes
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

Commits
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91072e6 Add test for Definition with exeption InvalidArgument

src/Symfony/Component/Workflow/Tests/DefinitionTest.php

@@ -17,6 +17,15 @@ class DefinitionTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('a', $definition->getInitialPlace());
     }
 
+    /**
+     * @expectedException Symfony\Component\Workflow\Exception\InvalidArgumentException
+     */
+    public function testAddPlacesInvalidArgument()
+    {
+        $places = array('a"', 'e"');
+        $definition = new Definition($places);
+    }
+
     public function testSetInitialPlace()
     {
         $places = range('a', 'e');