public function testApiCreateProcess_RejectsPromise()
{
$manager = $this->createProcessManager();
$alias = 'alias';
$flags = 'flags';
$callable = $this->createCallableMock();
$callable->expects($this->once())->method('__invoke')->with($this->isInstanceOf(RejectionException::class));
$manager->createProcess($alias, $flags)->then(null, $callable);
}