qa: add failing test for laminas#5

Thanks to Michael Weimann

Signed-off-by: Maximilian Bösing <2189546+boesing@users.noreply.github.com>

test/unit/MemoryTest.php

@@ -9,6 +9,10 @@
 namespace LaminasTest\Cache\Storage\Adapter;
 
 use Laminas\Cache;
+use Laminas\Cache\Exception\OutOfSpaceException;
+use function memory_get_usage;
+use function mt_rand;
+use function sha1;
 
 /**
  * @group      Laminas_Cache
@@ -38,7 +42,24 @@ public function testThrowOutOfSpaceException()
     {
         $this->_options->setMemoryLimit(memory_get_usage(true) - 8);
 
-        $this->expectException('Laminas\Cache\Exception\OutOfSpaceException');
+        $this->expectException(OutOfSpaceException::class);
         $this->_storage->addItem('test', 'test');
     }
+
+    public function testReclaimMemory()
+    {
+        $this->_options->setMemoryLimit(memory_get_usage(true) + 200);
+
+        try {
+            for ($i = 0; $i <= 100000; $i++) {
+                $this->_storage->addItem('item' . $i, sha1((string) mt_rand()));
+            }
+
+            self::fail('filling the cache with test data to reach the memory limit failed');
+        } catch (OutOfSpaceException $ignore) {
+        }
+
+        $this->_storage->flush();
+        $this->_storage->addItem('item' . $i, sha1((string) mt_rand()));
+    }
 }