/*
* 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.web.server.handler;
import java.util.Arrays;
import org.junit.Test;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;
import org.springframework.http.HttpStatus;
import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebExceptionHandler;
import org.springframework.web.server.WebHandler;
import org.springframework.web.server.adapter.HttpWebHandlerAdapter;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
/**
* Unit tests for {@link ExceptionHandlingWebHandler}.
* @author Rossen Stoyanchev
*/
public class ExceptionHandlingWebHandlerTests {
private final ServerWebExchange exchange = MockServerHttpRequest.get("http://localhost:8080").toExchange();
private final WebHandler targetHandler = new StubWebHandler(new IllegalStateException("boo"));
@Test
public void handleErrorSignal() throws Exception {
createWebHandler(new BadRequestExceptionHandler()).handle(this.exchange).block();
assertEquals(HttpStatus.BAD_REQUEST, this.exchange.getResponse().getStatusCode());
}
@Test
public void handleErrorSignalWithMultipleHttpErrorHandlers() throws Exception {
createWebHandler(
new UnresolvedExceptionHandler(),
new UnresolvedExceptionHandler(),
new BadRequestExceptionHandler(),
new UnresolvedExceptionHandler()).handle(this.exchange).block();
assertEquals(HttpStatus.BAD_REQUEST, this.exchange.getResponse().getStatusCode());
}
@Test
public void unresolvedException() throws Exception {
Mono<Void> mono = createWebHandler(new UnresolvedExceptionHandler()).handle(this.exchange);
StepVerifier.create(mono).expectErrorMessage("boo").verify();
assertNull(this.exchange.getResponse().getStatusCode());
}
@Test
public void unresolvedExceptionWithWebHttpHandlerAdapter() throws Exception {
// HttpWebHandlerAdapter handles unresolved errors
new HttpWebHandlerAdapter(createWebHandler(new UnresolvedExceptionHandler()))
.handle(this.exchange.getRequest(), this.exchange.getResponse()).block();
assertEquals(HttpStatus.INTERNAL_SERVER_ERROR, this.exchange.getResponse().getStatusCode());
}
@Test
public void thrownExceptionBecomesErrorSignal() throws Exception {
createWebHandler(new BadRequestExceptionHandler()).handle(this.exchange).block();
assertEquals(HttpStatus.BAD_REQUEST, this.exchange.getResponse().getStatusCode());
}
private WebHandler createWebHandler(WebExceptionHandler... handlers) {
return new ExceptionHandlingWebHandler(this.targetHandler, Arrays.asList(handlers));
}
private static class StubWebHandler implements WebHandler {
private final RuntimeException exception;
private final boolean raise;
StubWebHandler(RuntimeException exception) {
this(exception, false);
}
StubWebHandler(RuntimeException exception, boolean raise) {
this.exception = exception;
this.raise = raise;
}
@Override
public Mono<Void> handle(ServerWebExchange exchange) {
if (this.raise) {
throw this.exception;
}
return Mono.error(this.exception);
}
}
private static class BadRequestExceptionHandler implements WebExceptionHandler {
@Override
public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
exchange.getResponse().setStatusCode(HttpStatus.BAD_REQUEST);
return Mono.empty();
}
}
/** Leave the exception unresolved. */
private static class UnresolvedExceptionHandler implements WebExceptionHandler {
@Override
public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
return Mono.error(ex);
}
}
}