Function Explain

tensorflow/compiler/jit/node_matchers_test.cc:42–47

template <typename M, typename T>
string Explain(const T& t, const M& m) {
  ::testing::StringMatchResultListener listener;
  EXPECT_THAT(t, ::testing::Not(m));  // For the error message.
  EXPECT_FALSE(m.MatchAndExplain(t, &listener));
  return listener.str();
}

TEST(NodeMatchers, CheckAgainstConstant) {
  Scope root = Scope::NewRootScope().ExitOnError();