/*
* Copyright 2002-2017 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.test.web.reactive.server;
import java.time.Duration;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
/**
* {@code ExchangeResult} variant with the response body decoded as
* {@code Flux<T>} but not yet consumed.
*
* @param <T> the type of elements in the response body
*
* @author Rossen Stoyanchev
* @since 5.0
* @see EntityExchangeResult
*/
public class FluxExchangeResult<T> extends ExchangeResult {
private static final IllegalStateException TIMEOUT_ERROR =
new IllegalStateException("Response timeout: for infinite streams " +
"use getResponseBody() first with explicit cancellation, e.g. via take(n).");
private final Flux<T> body;
private final Duration timeout;
FluxExchangeResult(ExchangeResult result, Flux<T> body, Duration timeout) {
super(result);
this.body = body;
this.timeout = timeout;
}
/**
* Return the response body as a {@code Flux<T>} of decoded elements.
*
* <p>The response body stream can then be consumed further with the
* "reactor-test" {@code StepVerifier} and cancelled when enough elements have been
* consumed from the (possibly infinite) stream:
*
* <pre>
* FluxExchangeResult<Person> result = this.client.get()
* .uri("/persons")
* .accept(TEXT_EVENT_STREAM)
* .exchange()
* .expectStatus().isOk()
* .expectHeader().contentType(TEXT_EVENT_STREAM)
* .expectBody(Person.class)
* .returnResult();
*
* StepVerifier.create(result.getResponseBody())
* .expectNext(new Person("Jane"), new Person("Jason"))
* .expectNextCount(4)
* .expectNext(new Person("Jay"))
* .thenCancel()
* .verify();
* </pre>
*/
public Flux<T> getResponseBody() {
return this.body;
}
/**
* {@inheritDoc}
* <p><strong>Note:</strong> this method should typically be called after
* the response has been consumed in full via {@link #getResponseBody()}.
* Calling it first will cause the response {@code Flux<T>} to be consumed
* via {@code getResponseBody.ignoreElements()}.
*/
@Override
public byte[] getResponseBodyContent() {
return this.body.ignoreElements()
.timeout(this.timeout, Mono.error(TIMEOUT_ERROR))
.then(Mono.defer(() -> Mono.just(super.getResponseBodyContent())))
.block();
}
}