/**
* This method tests the "xor_" method.
*/
public function test_xor_()
{
$x = IBool\Type::true();
$y = IBool\Type::false();
$z = IBool\Module::xor_($x, $y);
$this->assertInstanceOf('\\Saber\\Data\\IBool\\Type', $z);
$this->assertSame(true, $z->unbox());
$z = IBool\Module::xor_($x, $x);
$this->assertInstanceOf('\\Saber\\Data\\IBool\\Type', $z);
$this->assertSame(false, $z->unbox());
$z = IBool\Module::xor_($y, $x);
$this->assertInstanceOf('\\Saber\\Data\\IBool\\Type', $z);
$this->assertSame(true, $z->unbox());
$z = IBool\Module::xor_($y, $y);
$this->assertInstanceOf('\\Saber\\Data\\IBool\\Type', $z);
$this->assertSame(false, $z->unbox());
}