/**
* This method tests the "nvl" method.
*/
public function test_nvl()
{
$x = ILinkedList\Type::make(array(1, 2, 3), '\\Saber\\Data\\IInt32\\Type');
$y = ILinkedList\Type::empty_();
$z = ILinkedList\Module::nvl($x, $y);
$this->assertInstanceOf('\\Saber\\Data\\ILinkedList\\Type', $z);
$this->assertSame(array(1, 2, 3), $z->unbox(1));
$z = ILinkedList\Module::nvl(null, $x);
$this->assertInstanceOf('\\Saber\\Data\\ILinkedList\\Type', $z);
$this->assertSame(array(1, 2, 3), $z->unbox(1));
$z = ILinkedList\Module::nvl(null, null);
$this->assertInstanceOf('\\Saber\\Data\\ILinkedList\\Type', $z);
$this->assertSame(array(), $z->unbox(1));
}