public function testGetLocaleFor()
 {
     $node = $this->fillTranslations();
     $doc = new Article();
     $strategy = new ChildTranslationStrategy();
     $locales = $strategy->getLocalesFor($doc, $node, $this->metadata);
     $this->assertInternalType('array', $locales);
     $this->assertEquals(3, count($locales));
     $this->assertContains('fr', $locales);
     $this->assertContains('en', $locales);
     $this->assertContains('de', $locales);
 }