cs

Author: TomasVotruba

src/Mapper/OutdatedPackageMapper.php

@@ -5,6 +5,7 @@
 namespace Rector\Jack\Mapper;
 
 use Rector\Jack\ValueObject\OutdatedPackage;
+use Webmozart\Assert\Assert;
 
 final class OutdatedPackageMapper
 {
@@ -61,9 +62,11 @@ private function parseComposerJsonToJson(string $composerJsonFilePath): array
 
         // use native functions to ease re-use by 3rd party packages
         $composerJsonContents = file_get_contents($composerJsonFilePath);
+        Assert::string($composerJsonContents);
 
         $composerJson = (array) json_decode($composerJsonContents, true);
 
+
         $this->cachedComposerJson[$composerJsonFilePath] = $composerJson;
 
         return $composerJson;