using exception

composer.json

@@ -11,8 +11,7 @@
         }
     ],
     "provide": {
-        "psr/cache-implementation": "1.0",
-        "psr/simple-cache-implementation": "1.0"
+        "psr/cache-implementation": "1.0"
     },
     "require": {
         "php": ">=7.4",

readme.md

@@ -2,13 +2,16 @@
 
 Example
 
-	use Stash\{
+	use Codin\Stash\{
 		Item,
-		RedisPool
+		Adapter\RedisPool
+        Adapter\Redis\ConnectionResolver
 	};
 
-	$redis = new Redis;
-	$pool = new RedisPool($redis);
+    $resolver = new ConnectionResolver(static function () {
+        return new Redis();
+    });
+	$pool = new RedisPool($resolver);
 
 	$item = new Item('my-key', 'some data');
 	$item->expiresAfter(3600); // 1 hour
@@ -18,3 +21,10 @@ Example
 	$item = $pool->getItem('my-key');
 	echo $item->get(); // some data
 	echo $item->isHit(); // true
+
+## Testing
+
+```
+php bin/phpstan
+php bin/phpspec run
+```

spec/Codin/Stash/Adapter/FileSystem/PhpSerialiserSpec.php

@@ -4,6 +4,7 @@
 
 namespace spec\Codin\Stash\Adapter\FileSystem;
 
+use Codin\Stash\Exceptions\SerialisationError;
 use Codin\Stash\Item;
 use PhpSpec\ObjectBehavior;
 
@@ -33,6 +34,6 @@ public function it_should_catch_decoded_unknowns()
 
         $encoded = serialize($item);
 
-        $this->shouldThrow(\RuntimeException::class)->duringDecode($encoded);
+        $this->shouldThrow(SerialisationError::class)->duringDecode($encoded);
     }
 }

src/Adapter/FileSystem/PhpSerialiser.php

@@ -4,6 +4,7 @@
 
 namespace Codin\Stash\Adapter\FileSystem;
 
+use Codin\Stash\Exceptions;
 use Psr\Cache\CacheItemInterface;
 
 class PhpSerialiser implements Serialiser
@@ -18,7 +19,7 @@ public function decode(string $data): CacheItemInterface
         $object = unserialize($data);
 
         if (!$object instanceof CacheItemInterface) {
-            throw new \RuntimeException('Failed to decode data for unknown object');
+            throw new Exceptions\SerialisationError('Failed to decode data for unknown object');
         }
 
         return $object;

src/Exceptions/SerialisationError.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Codin\Stash\Exceptions;
+
+use Exception;
+use Psr\Cache\CacheException;
+
+class SerialisationError extends Exception implements CacheException
+{
+}