Fix

Author: NikolaiProgramist

src/Parser.php

@@ -14,11 +14,17 @@ function parse(array $resultDiff, string $format): string
 function parseToJson(string $path): array
 {
     $content = getFileContent($path);
-    $extension = substr($path, strpos($path, '.'));
+    $offset = strpos($path, '.') + 1;
+
+    if ($offset === false) {
+        throw new \Exception("Incorrect path");
+    }
+
+    $extension = substr($path, $offset);
 
     return match ($extension) {
-        '.json' => json_decode($content, true),
-        '.yaml' => Yaml::parse($content),
+        'json' => json_decode($content, true),
+        'yaml' => Yaml::parse($content),
         default => throw new \Exception("There is no such extension: {$extension}")
     };
 }
@@ -33,5 +39,9 @@ function getFileContent(string $path): string
         $fullPath = "{$dirPath}/../../{$path}";
     }
 
+    if (!file_exists($fullPath)) {
+        throw new \Exception("Incorrect path");
+    }
+
     return file_get_contents($fullPath);
 }