public function testIncGets()
{
$variable = new Variable('a', null, CompiledExpression::UNKNOWN);
static::assertSame(0, $variable->getGets());
$variable->incGets();
static::assertSame(1, $variable->getGets());
$variable->incGets();
static::assertSame(2, $variable->getGets());
$variable->incGets();
$variable->incGets();
static::assertSame(4, $variable->getGets());
}