public function testHeaders()
{
$container = new Container('foo');
$container->setHeaders(['foo' => 'bar']);
$container->getMetadata()->set('bar', 'baz');
$this->assertEquals('bar', $container->getHeader('foo'));
$this->assertEquals(['foo' => ['bar'], 'X-Container-Meta-Bar' => 'baz'], $container->getHeaders());
}
