Stream::getMetadata() does not handle detached resource

[weierophinney]

What must return Stream::getMetadata() if resource is detached?

P.S.:
What should be the level of expectation of the error?
if i use:

$stream->write(function () {});

Do I have to expects an RutimeException?

---

Originally posted by @easy-system at zendframework/zend-diactoros#168

[Xerkus]

On detached resource getMetadata() should return null as there is no metadata to be had.

[boesing]

@Xerkus as per PSR-7, getMetadata without a specific argument has to return an associative array. I'd say, in case of detached resources, that should be just an empty array, no?

[Xerkus]

@boesing you are right. It should be empty array. I misread the docblock. Null is only expected when specific key is not found.