content: /*
   * Copyright 1999-2018 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.csp.sentinel.adapter.dubbo3.fallback;
  
  import com.alibaba.csp.sentinel.DubboTestUtil;
  import com.alibaba.csp.sentinel.adapter.dubbo3.config.DubboAdapterGlobalConfig;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowException;
  
  import org.apache.dubbo.rpc.AsyncRpcResult;
  import org.apache.dubbo.rpc.Result;
  import org.apache.dubbo.rpc.RpcInvocation;
  
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  import static org.mockito.Mockito.mock;
  
  /**
   * @author Eric Zhao
   */
  public class DubboFallbackRegistryTest {
  
      @Before
      public void setUp() {
          DubboAdapterGlobalConfig.setConsumerFallback(new DefaultDubboFallback());
      }
  
      @After
      public void tearDown() {
          DubboAdapterGlobalConfig.setConsumerFallback(new DefaultDubboFallback());
      }
  
      @Test
      public void testDefaultFallback() {
          // Test for default fallback.
          BlockException ex = new FlowException("xxx");
          Result result = new DefaultDubboFallback().handle(null, mock(RpcInvocation.class), ex);
          Assert.assertTrue("The result should carry exception", result.hasException());
          Assert.assertTrue(BlockException.isBlockException(result.getException()));
          Assert.assertTrue(result.getException().getMessage().contains(ex.getClass().getSimpleName()));
      }
  
      @Test
      public void testCustomFallback() {
          BlockException ex = new FlowException("xxx");
          DubboAdapterGlobalConfig.setConsumerFallback(
              (invoker, invocation, e) -> AsyncRpcResult
                  .newDefaultAsyncResult("Error: " + e.getClass().getName(), invocation));
          Result result = DubboAdapterGlobalConfig.getConsumerFallback()
              .handle(null, mock(RpcInvocation.class), ex);
          Assert.assertFalse("The invocation should not fail", result.hasException());
          Assert.assertEquals("Error: " + ex.getClass().getName(), result.getValue());
      }
  }
  