OutputHelper: added rollback()

Author: dg

src/Caching/OutputHelper.php

@@ -48,4 +48,14 @@ public function end(array $dependencies = []): void
 		$this->cache->save($this->key, ob_get_flush(), $dependencies + $this->dependencies);
 		$this->cache = null;
 	}
+
+
+	/**
+	 * Stops and throws away the output.
+	 */
+	public function rollback(): void
+	{
+		ob_end_flush();
+		$this->cache = null;
+	}
 }

tests/Storages/FileStorage.start.phpt

@@ -31,3 +31,14 @@ Assert::same('Hello', $cache->load('key'));
 ob_start();
 Assert::null($cache->start('key'));
 Assert::same('Hello', ob_get_clean());
+
+
+
+ob_start();
+$block = $cache->start('key2');
+Assert::type(Nette\Caching\OutputHelper::class, $block);
+echo 'Hello';
+$block->rollback();
+Assert::same('Hello', ob_get_clean());
+
+Assert::same(null, $cache->load('key2'));