EXPECT_TRUE(cache.Lookup("b", &value));
  EXPECT_EQ(value, 2);
  EXPECT_TRUE(cache.Lookup("c", &value));
  EXPECT_EQ(value, 3);
  EXPECT_TRUE(cache.Lookup("d", &value));
  EXPECT_EQ(value, 4);
  cache.Clear();
  EXPECT_FALSE(cache.Lookup("a", &value));
  EXPECT_FALSE(cache.Lookup("b", &value));
  EXPECT_FALSE(cache.Lookup("c", &value));
  EXPECT_FALSE(cache.Lookup("d", &value));
}

}

Status ImmediateExecutionTensorHandle::SummarizeValue(
    std::string& summary) const {
  Status status;
  AbstractTensorPtr resolved(
      // TODO(allenl): Resolve should be const, and the caches that get updated
      // marked mutable.
      const_cast<ImmediateExecutionTensorHandle*>(this)->Resolve(&status));
  if (!status.ok()) {
    return status;
  }
  summary = resolved->SummarizeValue();