text: // Copyright 2019 DeepMind Technologies Limited
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #include "open_spiel/games/leduc_poker.h"
  #include "open_spiel/policy.h"
  #include "open_spiel/spiel.h"
  #include "open_spiel/tests/basic_tests.h"
  
  namespace open_spiel {
  namespace leduc_poker {
  namespace {
  
  namespace testing = open_spiel::testing;
  
  void BasicLeducTests() {
    testing::LoadGameTest("leduc_poker");
    testing::ChanceOutcomesTest(*LoadGame("leduc_poker"));
    testing::RandomSimTest(*LoadGame("leduc_poker"), 100);
    testing::RandomSimTest(*LoadGame("leduc_poker",
                           {{"action_mapping", GameParameter(true)}}), 100);
    testing::RandomSimTest(*LoadGame("leduc_poker",
                           {{"suit_isomorphism", GameParameter(true)}}), 100);
    for (Player players = 3; players <= 5; players++) {
      testing::RandomSimTest(
          *LoadGame("leduc_poker", {{"players", GameParameter(players)}}), 100);
    }
    testing::ResampleInfostateTest(*LoadGame("leduc_poker"), /*num_sims=*/100);
    auto observer = LoadGame("leduc_poker")
                        ->MakeObserver(kDefaultObsType,
                                       GameParametersFromString("single_tensor"));
    testing::RandomSimTestCustomObserver(*LoadGame("leduc_poker"), observer);
  }
  
  void PolicyTest() {
    using PolicyGenerator = std::function<TabularPolicy(const Game& game)>;
    std::vector<PolicyGenerator> policy_generators = {
        GetAlwaysFoldPolicy,
        GetAlwaysCallPolicy,
        GetAlwaysRaisePolicy
    };
  
    std::shared_ptr<const Game> game = LoadGame("leduc_poker");
    for (const auto& policy_generator : policy_generators) {
      testing::TestEveryInfostateInPolicy(policy_generator, *game);
      testing::TestPoliciesCanPlay(policy_generator, *game);
    }
  }
  
  }  // namespace
  }  // namespace leduc_poker
  }  // namespace open_spiel
  
  int main(int argc, char** argv) {
    open_spiel::leduc_poker::BasicLeducTests();
    open_spiel::leduc_poker::PolicyTest();
  }
  