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;
  
  import com.alibaba.nacos.api.exception.runtime.NacosRuntimeException;
  import com.alibaba.nacos.api.naming.remote.request.NotifySubscriberRequest;
  import com.alibaba.nacos.api.naming.remote.response.NotifySubscriberResponse;
  import com.alibaba.nacos.api.remote.DefaultRequestFuture;
  import com.alibaba.nacos.common.remote.exception.ConnectionAlreadyClosedException;
  import com.alibaba.nacos.common.remote.exception.ConnectionBusyException;
  import com.alibaba.nacos.core.remote.ConnectionMeta;
  import com.alibaba.nacos.core.remote.RpcAckCallbackSynchronizer;
  import com.alibaba.nacos.plugin.control.ControlManagerCenter;
  import com.alibaba.nacos.plugin.control.tps.TpsControlManager;
  import com.alibaba.nacos.plugin.control.tps.response.TpsCheckResponse;
  import io.grpc.Status;
  import io.grpc.StatusRuntimeException;
  import io.grpc.netty.shaded.io.netty.channel.Channel;
  import io.grpc.netty.shaded.io.netty.channel.DefaultEventLoop;
  import io.grpc.stub.ServerCallStreamObserver;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.MockedStatic;
  import org.mockito.Mockito;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  @ExtendWith(MockitoExtension.class)
  // todo remove this
  @MockitoSettings(strictness = Strictness.LENIENT)
  class GrpcConnectionTest {
      
      @Mock
      ServerCallStreamObserver streamObserver;
      
      @Mock
      ControlManagerCenter controlManagerCenter;
      
      @Mock
      TpsControlManager tpsControlManager;
      
      GrpcConnection connection;
      
      MockedStatic<ControlManagerCenter> controlManagerCenterMockedStatic;
      
      @Mock
      private Channel channel;
      
      @AfterEach
      void setDown() throws IOException {
          if (controlManagerCenterMockedStatic != null) {
              controlManagerCenterMockedStatic.close();
          }
      }
      
      @BeforeEach
      void setUp() throws IOException {
          String ip = "1.1.1.1";
          ConnectionMeta connectionMeta = new ConnectionMeta("connectId" + System.currentTimeMillis(), ip, ip, 8888, 9848, "GRPC", "", "",
                  new HashMap<>());
          Mockito.when(channel.isOpen()).thenReturn(true);
          Mockito.when(channel.isActive()).thenReturn(true);
          connection = new GrpcConnection(connectionMeta, streamObserver, channel);
          connection.setTraced(true);
          
      }
      
      @Test
      void testStatusRuntimeException() {
          Mockito.doReturn(new DefaultEventLoop()).when(channel).eventLoop();
          Mockito.doThrow(new StatusRuntimeException(Status.CANCELLED)).when(streamObserver).onNext(Mockito.any());
          Mockito.doReturn(true).when(streamObserver).isReady();
          
          try {
              connection.request(new NotifySubscriberRequest(), 3000L);
              assertTrue(false);
          } catch (Exception e) {
              assertTrue(e instanceof ConnectionAlreadyClosedException);
              assertTrue(e.getCause() instanceof StatusRuntimeException);
              
          }
      }
      
      @Test
      void testIllegalStateException() {
          Mockito.doReturn(new DefaultEventLoop()).when(channel).eventLoop();
          Mockito.doThrow(new IllegalStateException()).when(streamObserver).onNext(Mockito.any());
          Mockito.doReturn(true).when(streamObserver).isReady();
          
          try {
              connection.request(new NotifySubscriberRequest(), 1000L);
              assertTrue(false);
          } catch (Exception e) {
              assertTrue(e instanceof ConnectionAlreadyClosedException);
              assertTrue(e.getCause() instanceof IllegalStateException);
          }
      }
      
      @Test
      void testOtherException() {
          Mockito.doReturn(new DefaultEventLoop()).when(channel).eventLoop();
          Mockito.doThrow(new Error("OOM")).when(streamObserver).onNext(Mockito.any());
          Mockito.doReturn(true).when(streamObserver).isReady();
          
          try {
              connection.request(new NotifySubscriberRequest(), 3000L);
              assertTrue(false);
          } catch (Throwable e) {
              assertTrue(e instanceof NacosRuntimeException);
              assertTrue(e.getCause() instanceof Error);
          }
      }
      
      @Test
      void testNormal() {
          Mockito.doReturn(new DefaultEventLoop()).when(channel).eventLoop();
          Mockito.doReturn(true).when(streamObserver).isReady();
          assertTrue(connection.isConnected());
          try {
              new Thread(new Runnable() {
                  @Override
                  public void run() {
                      long start = System.currentTimeMillis();
                      while ((System.currentTimeMillis() - start < 3000L)) {
                          Map<String, DefaultRequestFuture> stringDefaultRequestFutureMap = RpcAckCallbackSynchronizer.initContextIfNecessary(
                                  connection.getMetaInfo().getConnectionId());
                          if (!stringDefaultRequestFutureMap.entrySet().iterator().hasNext()) {
                              try {
                                  Thread.sleep(100L);
                                  continue;
                              } catch (InterruptedException e) {
                                  throw new RuntimeException(e);
                              }
                          }
                          Map.Entry<String, DefaultRequestFuture> next = stringDefaultRequestFutureMap.entrySet().iterator().next();
                          NotifySubscriberResponse notifySubscriberResponse = new NotifySubscriberResponse();
                          notifySubscriberResponse.setRequestId(next.getValue().getRequestId());
                          try {
                              RpcAckCallbackSynchronizer.ackNotify(connection.getMetaInfo().getConnectionId(), notifySubscriberResponse);
                          } catch (Exception e) {
                              //ignore
                          }
                      }
                  }
              }).start();
              connection.request(new NotifySubscriberRequest(), 3000L);
              assertTrue(true);
          } catch (Throwable e) {
              e.printStackTrace();
              assertFalse(true);
          }
      }
      
      @Test
      void testBusy() {
          controlManagerCenterMockedStatic = Mockito.mockStatic(ControlManagerCenter.class);
          Mockito.when(ControlManagerCenter.getInstance()).thenReturn(controlManagerCenter);
          Mockito.when(ControlManagerCenter.getInstance().getTpsControlManager()).thenReturn(tpsControlManager);
          Mockito.when(tpsControlManager.check(Mockito.any())).thenReturn(new TpsCheckResponse(true, 200, ""));
          Mockito.doReturn(false).when(streamObserver).isReady();
          
          try {
              connection.request(new NotifySubscriberRequest(), 3000L);
              assertTrue(false);
          } catch (Exception e) {
              assertTrue(e instanceof ConnectionBusyException);
          }
          
          try {
              Thread.sleep(3001);
          } catch (InterruptedException e) {
              throw new RuntimeException(e);
          }
          try {
              connection.request(new NotifySubscriberRequest(), 3000L);
              assertTrue(false);
          } catch (Exception e) {
              assertTrue(e instanceof ConnectionBusyException);
          }
          
          assertTrue(connection.getMetaInfo().pushQueueBlockTimesLastOver(3000));
          
      }
      
      @Test
      void testClose() {
          
          Mockito.doThrow(new IllegalStateException()).when(streamObserver).onCompleted();
          connection.close();
          Mockito.verify(channel, Mockito.times(1)).close();
          
      }
  }
  