Add "test/dependencies" dir and "godep restore" test

[chriscool]

This is to avoid problems like those in PR #591 (Fix bad commit sha1 for go-multiaddr-net dependency).

License: MIT
Signed-off-by: Christian Couder [email protected]

[jbenet]

@chriscool this will be helpful, but the one issue is that running godep restore may break the user's workspace and other packages, as it forces the installation of our versions. Ideally we could make godep restore things to a different directory, maybe the way to do it would be to set $GOPATH to a tmp directory removed at the end of the test run.

[chriscool]

Ok, I will see what I can do.

[chriscool]

@jbenet here is a new version using a temporary GOPATH as you suggest.
When running the new test here, it fails with:

# cd /home/christian/gocode/src/github.com/jbenet/goprocess; git checkout c37725a4a97d6ad772818b071ceef82789562142
fatal: reference is not a tree: c37725a4a97d6ad772818b071ceef82789562142
godep: restore: exit status 128

But I think it proves it correctly detect problems, and the problem should be fixed ;-)

[jbenet]

@chriscool indeed! this should fix it :)