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/**
* Copyright 2012-2020 The Feign 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 feign.reactive;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.BDDMockito.given;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyZeroInteractions;
import feign.InvocationHandlerFactory.MethodHandler;
import feign.RequestLine;
import feign.Target;
import io.reactivex.Flowable;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Collections;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Schedulers;
import reactor.test.StepVerifier;
@RunWith(MockitoJUnitRunner.class)
public class ReactiveInvocationHandlerTest {
@Mock
private Target target;
@Mock
private MethodHandler methodHandler;
private Method method;
@Before
public void setUp() throws NoSuchMethodException {
method = TestReactorService.class.getMethod("version");
}
@SuppressWarnings("unchecked")
@Test
public void invokeOnSubscribeReactor() throws Throwable {
given(this.methodHandler.invoke(any())).willReturn("Result");
ReactorInvocationHandler handler = new ReactorInvocationHandler(this.target,
Collections.singletonMap(method, this.methodHandler), Schedulers.elastic());
Object result = handler.invoke(method, this.methodHandler, new Object[] {});
assertThat(result).isInstanceOf(Mono.class);
verifyZeroInteractions(this.methodHandler);
/* subscribe and execute the method */
StepVerifier.create((Mono) result)
.expectNext("Result")
.expectComplete()
.verify();
verify(this.methodHandler, times(1)).invoke(any());
}
@Test
public void invokeOnSubscribeEmptyReactor() throws Throwable {
given(this.methodHandler.invoke(any())).willReturn(null);
ReactorInvocationHandler handler = new ReactorInvocationHandler(this.target,
Collections.singletonMap(method, this.methodHandler), Schedulers.elastic());
Object result = handler.invoke(method, this.methodHandler, new Object[] {});
assertThat(result).isInstanceOf(Mono.class);
verifyZeroInteractions(this.methodHandler);
/* subscribe and execute the method */
StepVerifier.create((Mono) result)
.expectComplete()
.verify();
verify(this.methodHandler, times(1)).invoke(any());
}
@Test
public void invokeFailureReactor() throws Throwable {
given(this.methodHandler.invoke(any())).willThrow(new IOException("Could Not Decode"));
ReactorInvocationHandler handler = new ReactorInvocationHandler(this.target,
Collections.singletonMap(this.method, this.methodHandler), Schedulers.elastic());
Object result = handler.invoke(this.method, this.methodHandler, new Object[] {});
assertThat(result).isInstanceOf(Mono.class);
verifyZeroInteractions(this.methodHandler);
/* subscribe and execute the method, should result in an error */
StepVerifier.create((Mono) result)
.expectError(IOException.class)
.verify();
verify(this.methodHandler, times(1)).invoke(any());
}
@SuppressWarnings("unchecked")
@Test
public void invokeOnSubscribeRxJava() throws Throwable {
given(this.methodHandler.invoke(any())).willReturn("Result");
RxJavaInvocationHandler handler =
new RxJavaInvocationHandler(this.target,
Collections.singletonMap(this.method, this.methodHandler),
io.reactivex.schedulers.Schedulers.trampoline());
Object result = handler.invoke(this.method, this.methodHandler, new Object[] {});
assertThat(result).isInstanceOf(Flowable.class);
verifyZeroInteractions(this.methodHandler);
/* subscribe and execute the method */
StepVerifier.create((Flowable) result)
.expectNext("Result")
.expectComplete()
.verify();
verify(this.methodHandler, times(1)).invoke(any());
}
@Test
public void invokeOnSubscribeEmptyRxJava() throws Throwable {
given(this.methodHandler.invoke(any())).willReturn(null);
RxJavaInvocationHandler handler =
new RxJavaInvocationHandler(this.target,
Collections.singletonMap(this.method, this.methodHandler),
io.reactivex.schedulers.Schedulers.trampoline());
Object result = handler.invoke(this.method, this.methodHandler, new Object[] {});
assertThat(result).isInstanceOf(Flowable.class);
verifyZeroInteractions(this.methodHandler);
/* subscribe and execute the method */
StepVerifier.create((Flowable) result)
.expectComplete()
.verify();
verify(this.methodHandler, times(1)).invoke(any());
}
@Test
public void invokeFailureRxJava() throws Throwable {
given(this.methodHandler.invoke(any())).willThrow(new IOException("Could Not Decode"));
RxJavaInvocationHandler handler =
new RxJavaInvocationHandler(this.target,
Collections.singletonMap(this.method, this.methodHandler),
io.reactivex.schedulers.Schedulers.trampoline());
Object result = handler.invoke(this.method, this.methodHandler, new Object[] {});
assertThat(result).isInstanceOf(Flowable.class);
verifyZeroInteractions(this.methodHandler);
/* subscribe and execute the method */
StepVerifier.create((Flowable) result)
.expectError(IOException.class)
.verify();
verify(this.methodHandler, times(1)).invoke(any());
}
public interface TestReactorService {
@RequestLine("GET /version")
Mono<String> version();
}
}