getBasePath() returns incorrect value for bare stream wrapper path

[Crell]

I've run into a bug where trying to glob a stream path on just the root fails. Specifically, in my app, Glob::getBasePath('foo://'); returns foo:/, rather than foo://. That means when trying to Glob::glob('foo://*'), the base path is wrong, so it cannot find any files. Moreover, since PHP doesn't recognize foo:/ as a file stream, whatever stream wrapper is registered for foo gets ignored. (Specifically, the elseif (is_dir($basePath)) clause comes back false, because there's no stream wrapper for foo:/, only for foo://.)

I believe the attached PR fixes the issue, though I defer to the maintainers if they'd prefer to take a slightly different approach. I had to split the test cases up because presumably a path of '' is not supposed to be supported as it's not absolute.

I... do not understand why the tests are failing with a permission denied error on PHP 8.0 only. That feels spurious, but perhaps the maintainers have a better understanding of what gives.

[Crell]

OK, slight correction. This works for a root path, but it breaks a pattern like foo://bar.*. It does, however, work for foo:///bar.*. I'm not sure how to resolve that.

[Nek-]

Hello @Crell , can you add a test case for foo://bar.* ?

If it currently works for foo:///bar.*, I guess we need to ensure that it will continue to work as well...

Btw thanks for the report and the PR.