class ClassCoversExistsRule

class ClassCoversExistsRule implements Rule {
    
    /**
     * Covers helper.
     *
     * @var CoversHelper
     */
    private $coversHelper;
    
    /**
     * Reflection provider.
     *
     * @var ReflectionProvider
     */
    private $reflectionProvider;
    public function __construct(CoversHelper $coversHelper, ReflectionProvider $reflectionProvider) {
        $this->reflectionProvider = $reflectionProvider;
        $this->coversHelper = $coversHelper;
    }
    public function getNodeType() : string {
        return InClassNode::class;
    }
    public function processNode(Node $node, Scope $scope) : array {
        $classReflection = $node->getClassReflection();
        if (!$classReflection->isSubclassOf(TestCase::class)) {
            return [];
        }
        $classPhpDoc = $classReflection->getResolvedPhpDoc();
        [
            $classCovers,
            $classCoversDefaultClasses,
        ] = $this->coversHelper
            ->getCoverAnnotations($classPhpDoc);
        if (count($classCoversDefaultClasses) >= 2) {
            return [
                RuleErrorBuilder::message(sprintf('@coversDefaultClass is defined multiple times.'))->identifier('phpunit.coversDuplicate')
                    ->build(),
            ];
        }
        $errors = [];
        $coversDefaultClass = array_shift($classCoversDefaultClasses);
        if ($coversDefaultClass !== null) {
            $className = (string) $coversDefaultClass->value;
            if (!$this->reflectionProvider
                ->hasClass($className)) {
                $errors[] = RuleErrorBuilder::message(sprintf('@coversDefaultClass references an invalid class %s.', $className))->identifier('phpunit.coversClass')
                    ->build();
            }
        }
        foreach ($classCovers as $covers) {
            $errors = array_merge($errors, $this->coversHelper
                ->processCovers($node, $covers, null));
        }
        return $errors;
    }

}