CanReplay reports whether an integration test can be run in replay mode.

JWTConfig reads the JSON private key file whose name is in the default environment variable, and returns the jwt.Config it contains.

NewRand creates a new *rand.Rand seeded with t.

ProjectID returns the project ID to use in integration tests, or the empty string if none is configured.

TokenSource returns the OAuth2 token source to use in integration tests, or nil if none is configured.

TokenSourceEnv returns the OAuth2 token source to use in integration tests.