public function testIsTranslated()
{
$adapter = new Adapter\ArrayAdapter(dirname(__FILE__) . '/_files/translation_en.php', 'en');
$this->assertTrue($adapter->isTranslated('Message 1'));
$this->assertFalse($adapter->isTranslated('Message 6'));
$this->assertTrue($adapter->isTranslated('Message 1', true));
$this->assertFalse($adapter->isTranslated('Message 1', true, 'en_US'));
$this->assertTrue($adapter->isTranslated('Message 1', false, 'en_US'));
$this->assertFalse($adapter->isTranslated('Message 1', false, 'es'));
$this->assertFalse($adapter->isTranslated('Message 1', 'es'));
$this->assertFalse($adapter->isTranslated('Message 1', 'xx_XX'));
$this->assertTrue($adapter->isTranslated('Message 1', 'en_XX'));
}