This creates a unique bucket name for each test, so that the tests in
parallel don't collide, and buckets left over from interrupted tests
don't cause future failures.
Also make sure that buckets are removed, regardless of content.
Since bucket names must be *globally* unique. By including the project
ID in the bucket name we ensure that people don't step on each other's
feet when testing.
This calls backend.TestBackend() and remote.TestRemoteLocks() for
standardized acceptance tests. It removes custom listing tests since
those are performed by backend.TestBackend(), too.
Since each tests uses its own bucket, all tests can be run in parallel.
The code is loosely based on state/remote/gcs_test.go. If the
GOOGLE_PROJECT environment variable is set, this test will
1) create a new bucket; error out if the bucket already exists.
2) create a new state
3) list states and ensure that the newly created state is listed
4) ensure that an object with the expected name exists
5) rum "state/remote".TestClient()
6) delete the state
The bucket is deleted when the test exits, though this may fail if the
bucket it not empty.