Guidance could be provided on where to put tests in library directories

[mancini0]

Hello,

Coming from a java background (where we put source code in /src/main/my/package, and tests in src/test/my/package), it's not obvious to me how Gophers typically structure their tests. Looking at istio's source, I see a test sub directory "pkg/test", but I also see tests directly in the pkg/ level:
For example: https://github.com/istio/istio/blob/master/pkg/channels/unbounded_test.go, https://github.com/istio/istio/blob/master/pkg/channels/unbounded.go.

Perhaps a contributor to this repository can provide their opinion on where tests belong in the pkg directory's README?

[mancini0]

closing, it seems the convention is to place tests in the same directory of the source code being tested.