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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Bell Canada.
* Modifications Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.cds.client;
import static org.assertj.core.api.Assertions.assertThatCode;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import io.grpc.ManagedChannel;
import io.grpc.inprocess.InProcessChannelBuilder;
import io.grpc.inprocess.InProcessServerBuilder;
import io.grpc.stub.StreamObserver;
import io.grpc.testing.GrpcCleanupRule;
import io.grpc.util.MutableHandlerRegistry;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.onap.ccsdk.cds.controllerblueprints.common.api.ActionIdentifiers;
import org.onap.ccsdk.cds.controllerblueprints.processing.api.BluePrintProcessingServiceGrpc.BluePrintProcessingServiceImplBase;
import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceInput;
import org.onap.ccsdk.cds.controllerblueprints.processing.api.ExecutionServiceOutput;
import org.onap.policy.cds.api.CdsProcessorListener;
import org.onap.policy.cds.api.TestCdsProcessorListenerImpl;
import org.onap.policy.cds.properties.CdsServerProperties;
public class CdsProcessorGrpcClientTest {
// Generate a unique in-process server name.
private static final String SERVER_NAME = InProcessServerBuilder.generateName();
// Manages automatic graceful shutdown for the registered server and client channels at the end of test.
@Rule
public final GrpcCleanupRule grpcCleanup = new GrpcCleanupRule();
private final CdsProcessorListener listener = spy(new TestCdsProcessorListenerImpl());
private final CdsServerProperties props = new CdsServerProperties();
private final MutableHandlerRegistry serviceRegistry = new MutableHandlerRegistry();
private final AtomicReference<StreamObserver<ExecutionServiceOutput>> responseObserverRef = new AtomicReference<>();
private final List<String> messagesDelivered = new ArrayList<>();
private final CountDownLatch allRequestsDelivered = new CountDownLatch(1);
private CdsProcessorGrpcClient client;
/**
* Setup the test.
*
* @throws IOException on failure to register the test grpc server for graceful shutdown
*/
@Before
public void setUp() throws IOException {
// Setup the CDS properties
props.setHost(SERVER_NAME);
props.setPort(2000);
props.setUsername("testUser");
props.setPassword("testPassword");
props.setTimeout(60);
// Create a server, add service, start, and register for automatic graceful shutdown.
grpcCleanup.register(InProcessServerBuilder.forName(SERVER_NAME)
.fallbackHandlerRegistry(serviceRegistry).directExecutor().build().start());
// Create a client channel and register for automatic graceful shutdown
ManagedChannel channel = grpcCleanup
.register(InProcessChannelBuilder.forName(SERVER_NAME).directExecutor().build());
// Create an instance of the gRPC client
client = new CdsProcessorGrpcClient(channel, new CdsProcessorHandler(listener, "gRPC://localhost:1234/"));
// Implement the test gRPC server
BluePrintProcessingServiceImplBase testCdsBlueprintServerImpl = new BluePrintProcessingServiceImplBase() {
@Override
public StreamObserver<ExecutionServiceInput> process(
final StreamObserver<ExecutionServiceOutput> responseObserver) {
responseObserverRef.set(responseObserver);
return new StreamObserver<ExecutionServiceInput>() {
@Override
public void onNext(final ExecutionServiceInput executionServiceInput) {
messagesDelivered.add(executionServiceInput.getActionIdentifiers().getActionName());
}
@Override
public void onError(final Throwable throwable) {
// Test method
}
@Override
public void onCompleted() {
allRequestsDelivered.countDown();
}
};
}
};
serviceRegistry.addService(testCdsBlueprintServerImpl);
}
@After
public void tearDown() {
client.close();
}
@Test
public void testCdsProcessorGrpcClientConstructor() {
assertThatCode(() -> new CdsProcessorGrpcClient(listener, props).close()).doesNotThrowAnyException();
}
@Test(expected = IllegalStateException.class)
public void testCdsProcessorGrpcClientConstructorFailure() {
props.setHost(null);
new CdsProcessorGrpcClient(listener, props).close();
}
@Test
public void testSendRequestFail() throws InterruptedException {
// Setup
ExecutionServiceInput testReq = ExecutionServiceInput.newBuilder()
.setActionIdentifiers(ActionIdentifiers.newBuilder().setActionName("policy-to-cds").build())
.build();
// Act
CountDownLatch finishLatch = client.sendRequest(testReq);
responseObserverRef.get().onError(new Throwable("failed to send testReq."));
verify(listener).onError(any(Throwable.class));
assertTrue(finishLatch.await(0, TimeUnit.SECONDS));
}
@Test
public void testSendRequestSuccess() throws InterruptedException {
// Setup request
ExecutionServiceInput testReq1 = ExecutionServiceInput.newBuilder()
.setActionIdentifiers(ActionIdentifiers.newBuilder().setActionName("policy-to-cds-req1").build()).build();
// Act
final CountDownLatch finishLatch = client.sendRequest(testReq1);
// Assert that request message was sent and delivered once to the server
assertTrue(allRequestsDelivered.await(1, TimeUnit.SECONDS));
assertEquals(Collections.singletonList("policy-to-cds-req1"), messagesDelivered);
// Setup the server to send out two simple response messages and verify that the client receives them.
ExecutionServiceOutput testResp1 = ExecutionServiceOutput.newBuilder()
.setActionIdentifiers(ActionIdentifiers.newBuilder().setActionName("policy-to-cds-resp1").build()).build();
ExecutionServiceOutput testResp2 = ExecutionServiceOutput.newBuilder()
.setActionIdentifiers(ActionIdentifiers.newBuilder().setActionName("policy-to-cds-resp2").build()).build();
responseObserverRef.get().onNext(testResp1);
verify(listener).onMessage(testResp1);
responseObserverRef.get().onNext(testResp2);
verify(listener).onMessage(testResp2);
// let server complete.
responseObserverRef.get().onCompleted();
assertTrue(finishLatch.await(0, TimeUnit.SECONDS));
}
}
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