message: Panic in tests if binary not found
diff: @@ -82,7 +82,11 @@ impl CaptureReader {
  }
  pub fn cargo_bin<S: AsRef<str>>(name: S) -> PathBuf {
  - cargo_bin_str(name.as_ref())
  + let path = cargo_bin_str(name.as_ref());
  + if !path.exists() {
  + panic!("Required binary {} does not exist", path.display());
  + }
  + path
  }
  fn target_dir() -> PathBuf {
  