public function testCompose()
{
$snippet = $this->snippetFromMethod(Bucket::class, 'compose');
$snippet->addLocal('bucket', $this->bucket);
$this->connection->composeObject(Argument::any())->shouldBeCalled()->willReturn(['name' => 'combined-logs.txt', 'generation' => 'foo']);
$this->bucket->setConnection($this->connection->reveal());
$res = $snippet->invoke('singleObject');
$this->assertInstanceOf(StorageObject::class, $res->returnVal());
$this->assertEquals('combined-logs.txt', $res->returnVal()->name());
}