content: /*
   * Copyright [2021-present] [ahoo wang <ahoowang@qq.com> (https://github.com/Ahoo-Wang)].
   * 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.
   */
  
  package me.ahoo.cosid.machine;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.*;
  
  import me.ahoo.cosid.test.MockIdGenerator;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  /**
   * DefaultMachineIdGuarderTest .
   *
   * @author ahoo wang
   */
  class DefaultMachineIdGuarderTest {
      private final ManualMachineIdDistributor distributor = new ManualMachineIdDistributor(1, MachineStateStorage.IN_MEMORY, ClockBackwardsSynchronizer.DEFAULT);
      
      @Test
      void register() {
          NamespacedInstanceId namespacedInstanceId = new NamespacedInstanceId(MockIdGenerator.INSTANCE.generateAsString(), InstanceId.NONE);
          DefaultMachineIdGuarder guarder = new DefaultMachineIdGuarder(distributor, MachineIdDistributor.FOREVER_SAFE_GUARD_DURATION);
          guarder.register(namespacedInstanceId.getNamespace(), namespacedInstanceId.getInstanceId());
          assertThat(guarder.getRegisteredInstanceIds(), hasItem(namespacedInstanceId));
          guarder.safeGuard();
      }
      
      @Test
      void registerIfNullNamespace() {
          NamespacedInstanceId namespacedInstanceId = new NamespacedInstanceId(MockIdGenerator.INSTANCE.generateAsString(), InstanceId.NONE);
          DefaultMachineIdGuarder guarder = new DefaultMachineIdGuarder(distributor, MachineIdDistributor.FOREVER_SAFE_GUARD_DURATION);
          Assertions.assertThrows(IllegalArgumentException.class, () -> guarder.register(null, namespacedInstanceId.getInstanceId()));
      }
      
      @Test
      void unregister() {
          NamespacedInstanceId namespacedInstanceId = new NamespacedInstanceId(MockIdGenerator.INSTANCE.generateAsString(), InstanceId.NONE);
          DefaultMachineIdGuarder guarder = new DefaultMachineIdGuarder(distributor, MachineIdDistributor.FOREVER_SAFE_GUARD_DURATION);
          guarder.register(namespacedInstanceId.getNamespace(), namespacedInstanceId.getInstanceId());
          assertThat(guarder.getRegisteredInstanceIds(), hasItem(namespacedInstanceId));
          guarder.unregister(namespacedInstanceId.getNamespace(), namespacedInstanceId.getInstanceId());
          assertThat(guarder.getRegisteredInstanceIds(), empty());
      }
      
      @Test
      void start() {
          DefaultMachineIdGuarder guarder = new DefaultMachineIdGuarder(distributor, MachineIdDistributor.FOREVER_SAFE_GUARD_DURATION);
          assertThat(guarder.isRunning(), equalTo(false));
          guarder.start();
          assertThat(guarder.isRunning(), equalTo(true));
      }
      
      @Test
      void stop() {
          DefaultMachineIdGuarder guarder = new DefaultMachineIdGuarder(distributor, MachineIdDistributor.FOREVER_SAFE_GUARD_DURATION);
          guarder.start();
          guarder.stop();
          assertThat(guarder.isRunning(), equalTo(false));
      }
  }
  