Validate checkedExceptionClasses config

Author: janedbal

build/phpstan.neon

@@ -39,7 +39,6 @@ parameters:
 			- 'PHPStan\ShouldNotHappenException'
 			- 'Symfony\Component\Console\Exception\InvalidArgumentException'
 			- 'PHPStan\BetterReflection\SourceLocator\Exception\InvalidFileLocation'
-			- 'PHPStan\BetterReflection\SourceLocator\Exception\InvalidArgumentException'
 			- 'Symfony\Component\Finder\Exception\DirectoryNotFoundException'
 			- 'InvalidArgumentException'
 			- 'PHPStan\DependencyInjection\ParameterNotFoundException'

src/Rules/Exceptions/DefaultExceptionTypeResolver.php

@@ -5,6 +5,7 @@
 use Nette\Utils\Strings;
 use PHPStan\Analyser\Scope;
 use PHPStan\Reflection\ReflectionProvider;
+use PHPStan\ShouldNotHappenException;
 use function count;
 
 /**
@@ -27,6 +28,16 @@ public function __construct(
 		private array $checkedExceptionClasses,
 	)
 	{
+		foreach ($this->checkedExceptionClasses as $checkedExceptionClass) {
+			if (!$this->reflectionProvider->hasClass($checkedExceptionClass)) {
+				throw new ShouldNotHappenException('Class ' . $checkedExceptionClass . ' used in \'checkedExceptionClasses\' does not exist.');
+			}
+		}
+		foreach ($this->uncheckedExceptionClasses as $uncheckedExceptionClass) {
+			if (!$this->reflectionProvider->hasClass($uncheckedExceptionClass)) {
+				throw new ShouldNotHappenException('Class ' . $uncheckedExceptionClass . ' used in \'uncheckedExceptionClasses\' does not exist.');
+			}
+		}
 	}
 
 	public function isCheckedException(string $className, Scope $scope): bool