/
HandlerResultHandlerTests.java
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/
HandlerResultHandlerTests.java
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/*
* Copyright 2002-2020 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
*
* https://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.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.junit.jupiter.api.Test;
import org.springframework.core.ReactiveAdapterRegistry;
import org.springframework.http.MediaType;
import org.springframework.mock.http.server.reactive.test.MockServerHttpRequest;
import org.springframework.mock.web.test.server.MockServerWebExchange;
import org.springframework.web.reactive.HandlerMapping;
import org.springframework.web.reactive.accept.FixedContentTypeResolver;
import org.springframework.web.reactive.accept.HeaderContentTypeResolver;
import org.springframework.web.reactive.accept.RequestedContentTypeResolver;
import static org.assertj.core.api.Assertions.assertThat;
import static org.springframework.http.MediaType.ALL;
import static org.springframework.http.MediaType.APPLICATION_JSON;
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;
/**
* Unit tests for {@link HandlerResultHandlerSupport}.
*
* @author Rossen Stoyanchev
*/
public class HandlerResultHandlerTests {
private final TestResultHandler resultHandler = new TestResultHandler();
@Test
void usesContentTypeResolver() {
TestResultHandler resultHandler = new TestResultHandler(new FixedContentTypeResolver(IMAGE_GIF));
List<MediaType> mediaTypes = Arrays.asList(IMAGE_JPEG, IMAGE_GIF, IMAGE_PNG);
MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/path"));
MediaType actual = resultHandler.selectMediaType(exchange, () -> mediaTypes);
assertThat(actual).isEqualTo(IMAGE_GIF);
}
@Test
void producibleMediaTypesRequestAttribute() {
MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/path"));
exchange.getAttributes().put(HandlerMapping.PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE, Collections.singleton(IMAGE_GIF));
List<MediaType> mediaTypes = Arrays.asList(IMAGE_JPEG, IMAGE_GIF, IMAGE_PNG);
MediaType actual = resultHandler.selectMediaType(exchange, () -> mediaTypes);
assertThat(actual).isEqualTo(IMAGE_GIF);
}
@Test // SPR-9160
void sortsByQuality() {
MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/path")
.header("Accept", "text/plain; q=0.5, application/json"));
List<MediaType> mediaTypes = Arrays.asList(TEXT_PLAIN, APPLICATION_JSON);
MediaType actual = this.resultHandler.selectMediaType(exchange, () -> mediaTypes);
assertThat(actual).isEqualTo(APPLICATION_JSON);
}
@Test
void charsetFromAcceptHeader() {
MediaType text8859 = MediaType.parseMediaType("text/plain;charset=ISO-8859-1");
MediaType textUtf8 = MediaType.parseMediaType("text/plain;charset=UTF-8");
MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/path").accept(text8859));
MediaType actual = this.resultHandler.selectMediaType(exchange, () -> Collections.singletonList(textUtf8));
assertThat(actual).isEqualTo(text8859);
}
@Test // SPR-12894
void noConcreteMediaType() {
List<MediaType> producible = Collections.singletonList(ALL);
MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/path"));
MediaType actual = this.resultHandler.selectMediaType(exchange, () -> producible);
assertThat(actual).isEqualTo(APPLICATION_OCTET_STREAM);
}
@Test
void removeQualityParameter() {
MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/path")
.header("Accept", "text/plain; q=0.5"));
List<MediaType> mediaTypes = Arrays.asList(APPLICATION_JSON, TEXT_PLAIN);
MediaType actual = this.resultHandler.selectMediaType(exchange, () -> mediaTypes);
assertThat(actual).isEqualTo(TEXT_PLAIN);
}
@SuppressWarnings("WeakerAccess")
private static class TestResultHandler extends HandlerResultHandlerSupport {
protected TestResultHandler() {
this(new HeaderContentTypeResolver());
}
public TestResultHandler(RequestedContentTypeResolver contentTypeResolver) {
super(contentTypeResolver, ReactiveAdapterRegistry.getSharedInstance());
}
}
}