phpstan-src/tests/PHPStan/Analyser/nsrt/bug-9455.php at 656a5276e3f33c8e4e6cb479a53fba8f7dc26a51 · phpstan-bot/phpstan-src · GitHub

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<?php // lint >= 8.0

declare(strict_types = 1);

namespace Bug9455;

use function PHPStan\Testing\assertType;

class A {
	public function __construct(private int $id){}

	public function getId(): int {
		return $this->id;
	}
}

class B {
	public function __construct(private int $id, private ?A $a = null){}

	public function getId(): int {
		return $this->id;
	}

	public function getA(): ?A {
		return $this->a;
	}
}

class HelloWorld
{
	public function testFails(): void
	{
		$a = new A(1);
		$b = new B(1, $a);

		$hasA = $b->getA() !== null;

		if($hasA) {
			assertType('Bug9455\A', $b->getA());
		}
	}

	public function testSucceeds(): void
	{
		$a = new A(1);
		$b = new B(1, $a);

		if($b->getA() !== null) {
			assertType('Bug9455\A', $b->getA());
		}
	}
}

class C {
	/**
	 * @phpstan-impure
	 */
	public function getA(): ?A {
		return rand(0, 1) ? new A(1) : null;
	}
}

class ImpureTest
{
	public function testImpureMethodNotNarrowed(): void
	{
		$c = new C();

		$hasA = $c->getA() !== null;

		if($hasA) {
			assertType('Bug9455\A|null', $c->getA());
		}
	}

	public function testImpureMethodInline(): void
	{
		$c = new C();

		if($c->getA() !== null) {
			assertType('Bug9455\A|null', $c->getA());
		}
	}
}