Method PickRandomKey

tensorflow/core/lib/io/table_test.cc:398–424

  }

  string PickRandomKey(random::SimplePhilox* rnd,
                       const std::vector<string>& keys) {
    if (keys.empty()) {
      return "foo";
    } else {
      const int index = rnd->Uniform(keys.size());
      string result = keys[index];
      switch (rnd->Uniform(3)) {
        case 0:
          // Return an existing key
          break;
        case 1: {
          // Attempt to return something smaller than an existing key
          if (!result.empty() && result[result.size() - 1] > '\0') {
            result[result.size() - 1]--;
          }
          break;
        }
        case 2: {
          // Return something larger than an existing key
          Increment(&result);
          break;
        }
      }
      return result;
    }
  }

 private:
  Options options_;