public function testExecute()
{
$application = $this->getApplication();
$application->add(new ListCommand());
$command = $this->getApplication()->find('eav:attribute:view');
$commandTester = new CommandTester($command);
$commandTester->execute(array('command' => $command->getName(), 'entityType' => 'catalog_product', 'attributeCode' => 'sku'));
$this->assertContains('sku', $commandTester->getDisplay());
$this->assertContains('catalog_product_entity', $commandTester->getDisplay());
$this->assertContains('Backend-Type', $commandTester->getDisplay());
$this->assertContains('static', $commandTester->getDisplay());
}