Basic PHPStan extension for beberlei/assertion library

AssertionClassExtension.php

<?php declare(strict_types = 1);

namespace PHPStan;

use Assert\Assertion;
use PHPStan\Reflection\ClassReflection;
use PHPStan\Reflection\MethodReflection;
use PHPStan\Reflection\MethodsClassReflectionExtension;

class AssertionClassExtension implements MethodsClassReflectionExtension
{
    public function hasMethod(ClassReflection $classReflection, string $methodName): bool
    {
        return $this->isAssertionClass($classReflection) && $this->isMagicAssertionMethod($methodName);
    }

    public function getMethod(ClassReflection $classReflection, string $methodName): MethodReflection
    {
        return new AssertionMethodExtension($methodName, $classReflection);
    }

    /**
     * @param ClassReflection $classReflection
     * @return bool
     */
    private function isAssertionClass(ClassReflection $classReflection)
    {
        return $classReflection->getName() === Assertion::class || $classReflection->isSubclassOf(Assertion::class);
    }

    /**
     * @param string $methodName
     * @return bool
     */
    private function isMagicAssertionMethod(string $methodName)
    {
        return strpos($methodName, 'nullOr') === 0 || strpos($methodName, 'all') === 0;
    }
}

AssertionMethodExtension.php

<?php declare(strict_types = 1);

namespace PHPStan;

use PHPStan\Reflection\ClassReflection;
use PHPStan\Reflection\MethodReflection;
use PHPStan\Type\BooleanType;
use PHPStan\Type\Type;

class AssertionMethodExtension implements MethodReflection
{
    /** @var string */
    private $methodName;
    /** @var ClassReflection */
    private $declaringClass;

    /**
     * @param string $methodName
     * @param ClassReflection $declaringClass
     */
    public function __construct(string $methodName, ClassReflection $declaringClass)
    {
        $this->methodName = $methodName;
        $this->declaringClass = $declaringClass;
    }

    public function getDeclaringClass(): ClassReflection
    {
        return $this->declaringClass;
    }

    public function isStatic(): bool
    {
        return true;
    }

    public function isPrivate(): bool
    {
        return false;
    }

    public function isPublic(): bool
    {
        return true;
    }

    public function getName(): string
    {
        return $this->methodName;
    }

    public function getParameters(): array
    {
        return [];
    }

    public function isVariadic(): bool
    {
        return true;
    }

    public function getReturnType(): Type
    {
        return new BooleanType(false);
    }
}

phpstan.neon

services:
    -
        class: PHPStan\AssertionClassExtension
        tags:
            - phpstan.broker.methodsClassReflectionExtension