content: /*
   * Copyright 1999-2020 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.core.remote.grpc.negotiator;
  
  import com.alibaba.nacos.common.utils.Pair;
  import com.alibaba.nacos.sys.env.EnvUtil;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.springframework.core.env.ConfigurableEnvironment;
  import org.springframework.mock.env.MockEnvironment;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  /**
   * Test SdkProtocolNegotiatorBuilderSingleton.
   *
   * @author stone-98
   * @date 2024/2/21
   */
  class SdkProtocolNegotiatorBuilderSingletonTest {
      
      @BeforeEach
      void setUp() throws Exception {
          ConfigurableEnvironment environment = new MockEnvironment();
          EnvUtil.setEnvironment(environment);
      }
      
      @AfterEach
      void tearDown() throws Exception {
      }
      
      @Test
      void testSingletonInstance() {
          AbstractProtocolNegotiatorBuilderSingleton singleton1 = SdkProtocolNegotiatorBuilderSingleton.getSingleton();
          AbstractProtocolNegotiatorBuilderSingleton singleton2 = SdkProtocolNegotiatorBuilderSingleton.getSingleton();
          assertSame(singleton1, singleton2);
      }
      
      @Test
      void testDefaultBuilderPair() {
          Pair<String, ProtocolNegotiatorBuilder> defaultPair = SdkProtocolNegotiatorBuilderSingleton.getSingleton().defaultBuilderPair();
          assertNotNull(defaultPair);
          assertEquals(SdkProtocolNegotiatorBuilderSingleton.TYPE_PROPERTY_KEY, defaultPair.getFirst());
          assertNotNull(defaultPair.getSecond());
      }
      
      @Test
      void testType() {
          String type = SdkProtocolNegotiatorBuilderSingleton.getSingleton().type();
          assertNotNull(type);
          assertEquals(SdkProtocolNegotiatorBuilderSingleton.TYPE_PROPERTY_KEY, type);
      }
  }
  