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ConditionalClientInterceptorTest.java
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ConditionalClientInterceptorTest.java
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/*
* Copyright 2022 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.gcp.observability.interceptors;
import static com.google.common.truth.Truth.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import io.grpc.CallOptions;
import io.grpc.Channel;
import io.grpc.ClientCall;
import io.grpc.ClientInterceptor;
import io.grpc.MethodDescriptor;
import io.grpc.MethodDescriptor.MethodType;
import java.util.function.BiPredicate;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
/**
* Tests for {@link ConditionalClientInterceptor}.
*/
@RunWith(JUnit4.class)
public class ConditionalClientInterceptorTest {
private ConditionalClientInterceptor conditionalClientInterceptor;
@Mock private ClientInterceptor delegate;
@Mock private BiPredicate<MethodDescriptor<?, ?>, CallOptions> predicate;
@Mock private Channel channel;
@Mock private ClientCall<?, ?> returnedCall;
private MethodDescriptor<?, ?> method;
@Before
@SuppressWarnings("unchecked")
public void setUp() throws Exception {
MockitoAnnotations.initMocks(this);
conditionalClientInterceptor = new ConditionalClientInterceptor(
delegate, predicate);
method = MethodDescriptor.newBuilder().setType(MethodType.UNARY)
.setFullMethodName("service/method")
.setRequestMarshaller(mock(MethodDescriptor.Marshaller.class))
.setResponseMarshaller(mock(MethodDescriptor.Marshaller.class))
.build();
}
@Test
@SuppressWarnings("unchecked")
public void predicateFalse() {
when(predicate.test(any(MethodDescriptor.class), any(CallOptions.class))).thenReturn(false);
doReturn(returnedCall).when(channel).newCall(method, CallOptions.DEFAULT);
ClientCall<?, ?> clientCall = conditionalClientInterceptor.interceptCall(method,
CallOptions.DEFAULT, channel);
assertThat(clientCall).isSameInstanceAs(returnedCall);
verify(delegate, never()).interceptCall(any(MethodDescriptor.class), any(CallOptions.class),
any(Channel.class));
}
@Test
@SuppressWarnings("unchecked")
public void predicateTrue() {
when(predicate.test(any(MethodDescriptor.class), any(CallOptions.class))).thenReturn(true);
doReturn(returnedCall).when(delegate).interceptCall(method, CallOptions.DEFAULT, channel);
ClientCall<?, ?> clientCall = conditionalClientInterceptor.interceptCall(method,
CallOptions.DEFAULT, channel);
assertThat(clientCall).isSameInstanceAs(returnedCall);
verify(channel, never()).newCall(any(MethodDescriptor.class), any(CallOptions.class));
}
}