tests: ensure samples pass if no samples exist (via synth) (#94)

Source-Author: Daniel Sanche <d.sanche14@gmail.com>
Source-Date: Wed Oct 14 08:00:06 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 477764cc4ee6db346d3febef2bb1ea0abf27de52
Source-Link: https://github.com/googleapis/synthtool/commit/477764cc4ee6db346d3febef2bb1ea0abf27de52
2 files changed