/
HystrixCommandsTests.java
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/
HystrixCommandsTests.java
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/*
* Copyright 2013-2017 the original author or 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 org.springframework.cloud.netflix.hystrix;
import java.time.Duration;
import org.junit.Test;
import com.netflix.hystrix.exception.HystrixRuntimeException;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;
public class HystrixCommandsTests {
@Test
public void monoWorks() {
StepVerifier.create(HystrixCommands.from(Flux.just("works"))
.commandName("testworks")
.toMono())
.expectNext("works")
.verifyComplete();
}
@Test
public void eagerMonoWorks() {
StepVerifier.create(HystrixCommands.from(Mono.just("works"))
.eager()
.commandName("testworks")
.toMono())
.expectNext("works")
.verifyComplete();
}
@Test
public void monoTimesOut() {
StepVerifier.create(HystrixCommands.from(Mono.fromCallable(() -> {
Thread.sleep(1500);
return "timeout";
})).commandName("failcmd").toMono())
.verifyError(HystrixRuntimeException.class);
}
@Test
public void monoFallbackWorks() {
StepVerifier.create(HystrixCommands.from(Mono.<String>error(new Exception()))
.commandName("failcmd")
.fallback(Mono.just("fallback"))
.toMono())
.expectNext("fallback")
.verifyComplete();
}
@Test
public void monoFallbackWithExceptionWorks() {
StepVerifier.create(HystrixCommands.from(Mono.<String>error(new IllegalStateException()))
.commandName("failcmd")
.fallback(throwable -> {
if (throwable instanceof IllegalStateException) {
return Mono.just("specificfallback");
}
return Mono.just("genericfallback");
})
.toMono())
.expectNext("specificfallback")
.verifyComplete();
}
@Test
public void fluxWorks() {
StepVerifier.create(HystrixCommands.from( Flux.just("1", "2"))
.commandName("multiflux")
.toFlux())
.expectNext("1")
.expectNext("2")
.verifyComplete();
}
@Test
public void fluxWorksDeferredRequest() {
StepVerifier.create(HystrixCommands.from(Flux.just("1", "2"))
.commandName("multiflux")
.build(), 1)
.expectNext("1")
.thenAwait(Duration.ofSeconds(1))
.thenRequest(1)
.expectNext("2")
.verifyComplete();
}
@Test
public void toObservableFunctionWorks() {
StepVerifier.create(HystrixCommands.from(Flux.just("1", "2"))
.commandName("multiflux")
.toObservable(cmd -> cmd.toObservable())
.build(), 1)
.expectNext("1")
.thenAwait(Duration.ofSeconds(1))
.thenRequest(1)
.verifyError();
}
@Test
public void eagerFluxWorks() {
StepVerifier.create(HystrixCommands.from( Flux.just("1", "2"))
.commandName("multiflux")
.eager()
.toFlux())
.expectNext("1")
.expectNext("2")
.verifyComplete();
}
@Test
public void fluxTimesOut() {
StepVerifier.create(HystrixCommands.from( Flux.from(s -> {
try {
Thread.sleep(1500);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
})).commandName("failcmd").toFlux())
.verifyError(HystrixRuntimeException.class);
}
@Test
public void fluxFallbackWorks() {
StepVerifier.create(HystrixCommands.from(Flux.<String>error(new Exception()))
.commandName("multiflux")
.fallback(Flux.just("a", "b"))
.toFlux())
.expectNext("a")
.expectNext("b")
.verifyComplete();
}
@Test
public void extendTimeout() {
StepVerifier.create(HystrixCommands.from(Mono.fromCallable(() -> {
Thread.sleep(1500);
return "works";
})).commandName("extendTimeout")
.commandProperties(
setter -> setter.withExecutionTimeoutInMilliseconds(2000))
.toMono())
.expectNext("works")
.verifyComplete();
}
}