/**
* This method tests the "nvl" method.
*/
public function test_nvl()
{
$x = IChar\Type::box('x');
$y = IChar\Type::box('y');
$z = IChar\Module::nvl($x, $y);
$this->assertInstanceOf('\\Saber\\Data\\IChar\\Type', $z);
$this->assertSame('x', $z->unbox());
$z = IChar\Module::nvl(null, $x);
$this->assertInstanceOf('\\Saber\\Data\\IChar\\Type', $z);
$this->assertSame('x', $z->unbox());
$z = IChar\Module::nvl(null, null);
$this->assertInstanceOf('\\Saber\\Data\\IChar\\Type', $z);
$this->assertSame(chr(0), $z->unbox());
}
