public function testDump() {
$dumper = new YamlDumper($container = new ContainerBuilder());
$this
->assertStringEqualsFile(self::$fixturesPath . '/yaml/services1.yml', $dumper
->dump(), '->dump() dumps an empty container as an empty YAML file');
$container = new ContainerBuilder();
$dumper = new YamlDumper($container);
}