models-interactions/model-simulators/src/test/java/org/onap/policy/simulators/CdsSimulatorTest.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP
   4  * ================================================================================
   5  * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
   6  * Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
   7  * ================================================================================
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  * ============LICENSE_END=========================================================
  20  */
  21
  22 package org.onap.policy.simulators;
  23
  24 import static org.junit.Assert.assertEquals;
  25 import static org.junit.Assert.assertTrue;
  26
  27 import com.google.protobuf.util.JsonFormat;
  28 import io.grpc.ManagedChannel;
  29 import io.grpc.internal.DnsNameResolverProvider;
  30 import io.grpc.internal.PickFirstLoadBalancerProvider;
  31 import io.grpc.netty.NettyChannelBuilder;
  32 import io.grpc.stub.StreamObserver;
  33 import java.io.IOException;
  34 import java.nio.charset.StandardCharsets;
  35 import java.util.concurrent.CompletableFuture;
  36 import java.util.concurrent.CountDownLatch;
  37 import java.util.concurrent.TimeUnit;
  38 import org.apache.commons.io.IOUtils;
  39 import org.json.simple.parser.ParseException;
  40 import org.junit.After;
  41 import org.junit.Before;
  42 import org.junit.Test;
  43 import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc;
  44 import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceStub;
  45 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput;
  46 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput.Builder;
  47 import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput;
  48 import org.onap.policy.common.utils.coder.CoderException;
  49 import org.onap.policy.common.utils.coder.StandardCoder;
  50 import org.onap.policy.common.utils.network.NetworkUtil;
  51 import org.onap.policy.common.utils.resources.ResourceUtils;
  52
  53 public class CdsSimulatorTest {
  54     private static final StandardCoder coder = new StandardCoder();
  55
  56     private CdsSimulator sim;
  57
  58     /**
  59      * Starts the simulator, allocating a unique port for each test so we don't have to
  60      * wait for the prior server to shut down.
  61      */
  62     @Before
  63     public void setUp() throws Exception {
  64         int port = NetworkUtil.allocPort();
  65         sim = new CdsSimulator(Util.LOCALHOST, port);
  66         sim.start();
  67     }
  68
  69     @After
  70     public void tearDown() {
  71         sim.stop();
  72     }
  73
  74     @Test
  75     public void test() throws Exception {
  76         String reqstr = IOUtils.toString(getClass().getResource("cds/cds.request.json"), StandardCharsets.UTF_8);
  77         Builder builder = ExecutionServiceInput.newBuilder();
  78         JsonFormat.parser().ignoringUnknownFields().merge(reqstr, builder);
  79         ExecutionServiceInput request = builder.build();
  80         ManagedChannel channel = NettyChannelBuilder.forAddress(Util.LOCALHOST, sim.getPort())
  81             .nameResolverFactory(new DnsNameResolverProvider())
  82             .loadBalancerFactory(new PickFirstLoadBalancerProvider()).usePlaintext().build();
  83
  84         try {
  85             final CompletableFuture<ExecutionServiceOutput> future = new CompletableFuture<>();
  86             final CountDownLatch completed = new CountDownLatch(1);
  87
  88             BluePrintProcessingServiceStub asyncStub = BluePrintProcessingServiceGrpc.newStub(channel);
  89
  90             StreamObserver<ExecutionServiceOutput> responseObserver = new StreamObserver<ExecutionServiceOutput>() {
  91                 @Override
  92                 public void onNext(ExecutionServiceOutput output) {
  93                     future.complete(output);
  94                 }
  95
  96                 @Override
  97                 public void onError(Throwable throwable) {
  98                     future.completeExceptionally(throwable);
  99                 }
 100
 101                 @Override
 102                 public void onCompleted() {
 103                     completed.countDown();
 104                 }
 105             };
 106
 107             StreamObserver<ExecutionServiceInput> requestObserver = asyncStub.process(responseObserver);
 108             try {
 109                 // publish the message
 110                 requestObserver.onNext(request);
 111
 112                 // indicate that the request is done
 113                 requestObserver.onCompleted();
 114
 115             } catch (RuntimeException e) {
 116                 requestObserver.onError(e);
 117             }
 118
 119             // wait for it to complete
 120             assertTrue(completed.await(5, TimeUnit.SECONDS));
 121
 122             ExecutionServiceOutput result = future.get();
 123             assertEquals(200, result.getStatus().getCode());
 124
 125         } finally {
 126             channel.shutdown();
 127         }
 128     }
 129
 130     @Test
 131     public void testGetResponseString() throws IOException, CoderException, ParseException {
 132         CdsSimulator cdsSimulator = new CdsSimulator(Util.LOCALHOST, sim.getPort());
 133         String reqstr = ResourceUtils.getResourceAsString(
 134             "org/onap/policy/simulators/cds/cds.request.json");
 135         String responseqstr = ResourceUtils.getResourceAsString(
 136             "org/onap/policy/simulators/cds/pm_control-create-subscription.json");
 137         ExecutionServiceInput request = coder.decode(reqstr, ExecutionServiceInput.class);
 138         assertEquals(responseqstr, cdsSimulator.getResponseString(request, 0));
 139     }
 140 }