message: Fix testing deprecation version.
diff: @@ -182,13 +182,16 @@ void TestDeprecationVersionSetCorrectly(
  for (const auto& name_and_api_def : api_defs_map) {
  const auto& name = name_and_api_def.first;
  const auto& api_def = name_and_api_def.second;
  - ASSERT_TRUE(api_def.deprecation_version() == 0 ||
  - api_def.deprecation_message().empty())
  + if (api_def.deprecation_version() != 0) {
  + ASSERT_TRUE(api_def.deprecation_version() > 0)
  + << "Found ApiDef with negative deprecation_version";
  + ASSERT_FALSE(api_def.deprecation_message().empty())
  << "ApiDef that includes deprecation_version > 0 must also specify "
  << "a deprecation_message. Op " << name
  << " has deprecation_version > 0 but deprecation_message is not set.";
  }
  }
  +}
  } // namespace
  class BaseApiTest : public ::testing::Test {
  