/*
* Copyright 2002-2016 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.reactive.result;
import java.net.URI;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.junit.Before;
import org.junit.Test;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.MockServerHttpRequest;
import org.springframework.http.server.reactive.MockServerHttpResponse;
import org.springframework.web.reactive.accept.FixedContentTypeResolver;
import org.springframework.web.reactive.accept.HeaderContentTypeResolver;
import org.springframework.web.reactive.accept.RequestedContentTypeResolver;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.adapter.DefaultServerWebExchange;
import org.springframework.web.server.session.MockWebSessionManager;
import static org.junit.Assert.assertEquals;
import static org.springframework.http.MediaType.ALL;
import static org.springframework.http.MediaType.APPLICATION_JSON_UTF8;
import static org.springframework.http.MediaType.APPLICATION_OCTET_STREAM;
import static org.springframework.http.MediaType.IMAGE_GIF;
import static org.springframework.http.MediaType.IMAGE_JPEG;
import static org.springframework.http.MediaType.IMAGE_PNG;
import static org.springframework.http.MediaType.TEXT_PLAIN;
import static org.springframework.web.reactive.HandlerMapping.PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE;
/**
* Unit tests for {@link ContentNegotiatingResultHandlerSupport}.
* @author Rossen Stoyanchev
*/
public class ContentNegotiatingResultHandlerSupportTests {
private TestResultHandler resultHandler;
private MockServerHttpRequest request;
private ServerWebExchange exchange;
@Before
public void setUp() throws Exception {
this.resultHandler = new TestResultHandler();
this.request = new MockServerHttpRequest(HttpMethod.GET, new URI("/path"));
this.exchange = new DefaultServerWebExchange(
this.request, new MockServerHttpResponse(), new MockWebSessionManager());
}
@Test
public void usesContentTypeResolver() throws Exception {
TestResultHandler resultHandler = new TestResultHandler(new FixedContentTypeResolver(IMAGE_GIF));
List<MediaType> mediaTypes = Arrays.asList(IMAGE_JPEG, IMAGE_GIF, IMAGE_PNG);
MediaType actual = resultHandler.selectMediaType(this.exchange, mediaTypes);
assertEquals(IMAGE_GIF, actual);
}
@Test
public void producibleMediaTypesRequestAttribute() throws Exception {
Set<MediaType> producible = Collections.singleton(IMAGE_GIF);
this.exchange.getAttributes().put(PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE, producible);
List<MediaType> mediaTypes = Arrays.asList(IMAGE_JPEG, IMAGE_GIF, IMAGE_PNG);
MediaType actual = resultHandler.selectMediaType(this.exchange, mediaTypes);
assertEquals(IMAGE_GIF, actual);
}
@Test // SPR-9160
public void sortsByQuality() throws Exception {
this.request.getHeaders().add("Accept", "text/plain; q=0.5, application/json");
List<MediaType> mediaTypes = Arrays.asList(TEXT_PLAIN, APPLICATION_JSON_UTF8);
MediaType actual = this.resultHandler.selectMediaType(this.exchange, mediaTypes);
assertEquals(APPLICATION_JSON_UTF8, actual);
}
@Test
public void charsetFromAcceptHeader() throws Exception {
MediaType text8859 = MediaType.parseMediaType("text/plain;charset=ISO-8859-1");
MediaType textUtf8 = MediaType.parseMediaType("text/plain;charset=UTF-8");
this.request.getHeaders().setAccept(Collections.singletonList(text8859));
MediaType actual = this.resultHandler.selectMediaType(this.exchange, Collections.singletonList(textUtf8));
assertEquals(text8859, actual);
}
@Test // SPR-12894
public void noConcreteMediaType() throws Exception {
List<MediaType> producible = Collections.singletonList(ALL);
MediaType actual = this.resultHandler.selectMediaType(this.exchange, producible);
assertEquals(APPLICATION_OCTET_STREAM, actual);
}
@SuppressWarnings("WeakerAccess")
private static class TestResultHandler extends ContentNegotiatingResultHandlerSupport {
protected TestResultHandler() {
this(new HeaderContentTypeResolver());
}
public TestResultHandler(RequestedContentTypeResolver contentTypeResolver) {
super(new GenericConversionService(), contentTypeResolver);
}
}
}