public function test_that_merge_meta_data_merges_meta_data()
{
$metaData = MetaData::create(['ip_address' => '127.0.0.1']);
$this->message = $this->message->mergeMetaData($metaData);
$this->assertSame('{"foo":"bar","ip_address":"127.0.0.1"}', (string) $this->message->metaData());
}
