/
NameResolverTest.java
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/
NameResolverTest.java
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/*
* Copyright 2017 The gRPC Authors
*
* 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 io.grpc;
import static com.google.common.truth.Truth.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.same;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import io.grpc.NameResolver.ConfigOrError;
import io.grpc.NameResolver.ServiceConfigParser;
import java.lang.Thread.UncaughtExceptionHandler;
import java.net.URI;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for the inner classes in {@link NameResolver}. */
@RunWith(JUnit4.class)
public class NameResolverTest {
private final int defaultPort = 293;
private final ProxyDetector proxyDetector = mock(ProxyDetector.class);
private final SynchronizationContext syncContext =
new SynchronizationContext(mock(UncaughtExceptionHandler.class));
private final ServiceConfigParser parser = mock(ServiceConfigParser.class);
private final ScheduledExecutorService scheduledExecutorService =
mock(ScheduledExecutorService.class);
private final ChannelLogger channelLogger = mock(ChannelLogger.class);
private final Executor executor = Executors.newSingleThreadExecutor();
private URI uri;
private final NameResolver nameResolver = mock(NameResolver.class);
@Before
public void setUp() throws Exception {
uri = new URI("fake://service");
}
@Test
public void args() {
NameResolver.Args args = createArgs();
assertThat(args.getDefaultPort()).isEqualTo(defaultPort);
assertThat(args.getProxyDetector()).isSameInstanceAs(proxyDetector);
assertThat(args.getSynchronizationContext()).isSameInstanceAs(syncContext);
assertThat(args.getServiceConfigParser()).isSameInstanceAs(parser);
assertThat(args.getScheduledExecutorService()).isSameInstanceAs(scheduledExecutorService);
assertThat(args.getChannelLogger()).isSameInstanceAs(channelLogger);
assertThat(args.getOffloadExecutor()).isSameInstanceAs(executor);
NameResolver.Args args2 = args.toBuilder().build();
assertThat(args2.getDefaultPort()).isEqualTo(defaultPort);
assertThat(args2.getProxyDetector()).isSameInstanceAs(proxyDetector);
assertThat(args2.getSynchronizationContext()).isSameInstanceAs(syncContext);
assertThat(args2.getServiceConfigParser()).isSameInstanceAs(parser);
assertThat(args2.getScheduledExecutorService()).isSameInstanceAs(scheduledExecutorService);
assertThat(args2.getChannelLogger()).isSameInstanceAs(channelLogger);
assertThat(args2.getOffloadExecutor()).isSameInstanceAs(executor);
assertThat(args2).isNotSameInstanceAs(args);
assertThat(args2).isNotEqualTo(args);
}
@Deprecated
@Test
public void newNameResolver_Api2DelegatesToApi1() {
final AtomicReference<Attributes> paramsCapture = new AtomicReference<>();
NameResolver.Factory factory = new NameResolver.Factory() {
@Deprecated
@Override
public NameResolver newNameResolver(URI targetUri, Attributes params) {
assertThat(targetUri).isSameInstanceAs(uri);
paramsCapture.set(params);
return nameResolver;
}
@Override
public String getDefaultScheme() {
throw new AssertionError();
}
};
assertThat(factory.newNameResolver(uri, new NameResolver.Helper() {
@Override
public int getDefaultPort() {
return defaultPort;
}
@Override
public ProxyDetector getProxyDetector() {
return proxyDetector;
}
@Override
public SynchronizationContext getSynchronizationContext() {
return syncContext;
}
})).isSameInstanceAs(nameResolver);
Attributes params = paramsCapture.get();
assertThat(params.get(NameResolver.Factory.PARAMS_DEFAULT_PORT)).isEqualTo(defaultPort);
assertThat(params.get(NameResolver.Factory.PARAMS_PROXY_DETECTOR))
.isSameInstanceAs(proxyDetector);
}
@Deprecated
@SuppressWarnings("unchecked")
@Test
public void newNameResolver_Api3DelegatesToApi2() {
final AtomicReference<NameResolver.Helper> helperCapture = new AtomicReference<>();
NameResolver.Factory factory = new NameResolver.Factory() {
@Deprecated
@Override
public NameResolver newNameResolver(URI targetUri, NameResolver.Helper helper) {
assertThat(targetUri).isSameInstanceAs(uri);
helperCapture.set(helper);
return nameResolver;
}
@Override
public String getDefaultScheme() {
return "fake";
}
};
assertThat(factory.newNameResolver(uri, createArgs())).isSameInstanceAs(nameResolver);
NameResolver.Helper helper = helperCapture.get();
assertThat(helper.getDefaultPort()).isEqualTo(defaultPort);
assertThat(helper.getProxyDetector()).isSameInstanceAs(proxyDetector);
assertThat(helper.getSynchronizationContext()).isSameInstanceAs(syncContext);
// Test service config parsing
ConfigOrError coe = ConfigOrError.fromConfig("A config");
when(parser.parseServiceConfig(any(Map.class))).thenReturn(coe);
Map<String, ?> rawConfig = Collections.singletonMap("Key", "value");
assertThat(helper.parseServiceConfig(rawConfig)).isSameInstanceAs(coe);
verify(parser).parseServiceConfig(same(rawConfig));
}
// Tests that a forwarding factory on API1 can correctly delegate to a factory already migrated
// to API3 without losing information.
@Deprecated
@SuppressWarnings("unchecked")
@Test
public void newNameResolver_forwardingFactory1DelegatesToApi3() {
final AtomicReference<NameResolver.Args> argsCapture = new AtomicReference<>();
final NameResolver.Factory delegate = new NameResolver.Factory() {
@Override
public NameResolver newNameResolver(URI targetUri, NameResolver.Args args) {
assertThat(targetUri).isSameInstanceAs(uri);
argsCapture.set(args);
return nameResolver;
}
@Override
public String getDefaultScheme() {
throw new AssertionError();
}
};
NameResolver.Factory forwarding = new NameResolver.Factory() {
@Deprecated
public NameResolver newNameResolver(URI targetUri, Attributes attrs) {
return delegate.newNameResolver(targetUri, attrs);
}
@Override
public String getDefaultScheme() {
throw new AssertionError();
}
};
// gRPC channel is calling forwarding with API3.
assertThat(forwarding.newNameResolver(uri, createArgs())).isSameInstanceAs(nameResolver);
NameResolver.Args args = argsCapture.get();
assertThat(args.getDefaultPort()).isEqualTo(defaultPort);
assertThat(args.getProxyDetector()).isSameInstanceAs(proxyDetector);
assertThat(args.getSynchronizationContext()).isSameInstanceAs(syncContext);
ServiceConfigParser passedParser = args.getServiceConfigParser();
ConfigOrError coe = ConfigOrError.fromConfig("A config");
when(parser.parseServiceConfig(any(Map.class))).thenReturn(coe);
Map<String, ?> rawConfig = Collections.singletonMap("Key", "value");
assertThat(passedParser.parseServiceConfig(rawConfig)).isSameInstanceAs(coe);
verify(parser).parseServiceConfig(same(rawConfig));
}
// Tests that a forwarding factory on API2 can correctly delegate to a factory already migrated
// to API3 without losing information.
@Deprecated
@SuppressWarnings("unchecked")
@Test
public void newNameResolver_forwardingFactory2DelegatesToApi3() {
final AtomicReference<NameResolver.Args> argsCapture = new AtomicReference<>();
final NameResolver.Factory delegate = new NameResolver.Factory() {
@Override
public NameResolver newNameResolver(URI targetUri, NameResolver.Args args) {
assertThat(targetUri).isSameInstanceAs(uri);
argsCapture.set(args);
return nameResolver;
}
@Override
public String getDefaultScheme() {
throw new AssertionError();
}
};
NameResolver.Factory forwarding = new NameResolver.Factory() {
@Deprecated
public NameResolver newNameResolver(URI targetUri, NameResolver.Helper helper) {
return delegate.newNameResolver(targetUri, helper);
}
@Override
public String getDefaultScheme() {
throw new AssertionError();
}
};
// gRPC channel is calling forwarding with API3.
assertThat(forwarding.newNameResolver(uri, createArgs())).isSameInstanceAs(nameResolver);
NameResolver.Args args = argsCapture.get();
assertThat(args.getDefaultPort()).isEqualTo(defaultPort);
assertThat(args.getProxyDetector()).isSameInstanceAs(proxyDetector);
assertThat(args.getSynchronizationContext()).isSameInstanceAs(syncContext);
ServiceConfigParser passedParser = args.getServiceConfigParser();
ConfigOrError coe = ConfigOrError.fromConfig("A config");
when(parser.parseServiceConfig(any(Map.class))).thenReturn(coe);
Map<String, ?> rawConfig = Collections.singletonMap("Key", "value");
assertThat(passedParser.parseServiceConfig(rawConfig)).isSameInstanceAs(coe);
verify(parser).parseServiceConfig(same(rawConfig));
}
private NameResolver.Args createArgs() {
return NameResolver.Args.newBuilder()
.setDefaultPort(defaultPort)
.setProxyDetector(proxyDetector)
.setSynchronizationContext(syncContext)
.setServiceConfigParser(parser)
.setScheduledExecutorService(scheduledExecutorService)
.setChannelLogger(channelLogger)
.setOffloadExecutor(executor)
.build();
}
}