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.dubbo.fallback;
  
  import com.alibaba.csp.sentinel.adapter.dubbo.DubboAdapterGlobalConfig;
  import com.alibaba.csp.sentinel.slots.block.BlockException;
  import com.alibaba.csp.sentinel.slots.block.SentinelRpcException;
  import com.alibaba.csp.sentinel.slots.block.flow.FlowException;
  import com.alibaba.dubbo.rpc.Invocation;
  import com.alibaba.dubbo.rpc.Invoker;
  import com.alibaba.dubbo.rpc.Result;
  import com.alibaba.dubbo.rpc.RpcResult;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * @author Eric Zhao
   */
  public class DubboFallbackRegistryTest {
  
      @Test
      public void testDefaultFallback() {
          // Test for default fallback.
          BlockException ex = new FlowException("xxx");
          Result result = new DefaultDubboFallback().handle(null, null, ex);
          Assert.assertTrue(result.hasException());
          Assert.assertEquals(SentinelRpcException.class, result.getException().getClass());
      }
  
      @Test
      public void testCustomFallback() {
          BlockException ex = new FlowException("xxx");
          DubboAdapterGlobalConfig.setConsumerFallback(new DubboFallback() {
              @Override
              public Result handle(Invoker<?> invoker, Invocation invocation, BlockException e) {
                  return new RpcResult("Error: " + e.getClass().getName());
              }
          });
          Result result = DubboAdapterGlobalConfig.getConsumerFallback()
              .handle(null, null, ex);
          Assert.assertFalse("The invocation should not fail", result.hasException());
          Assert.assertEquals("Error: " + ex.getClass().getName(), result.getValue());
      }
  }
  