/*
* Copyright 2002-2013 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.messaging.converter;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.util.MimeType;
import org.springframework.util.MimeTypeUtils;
import static org.junit.Assert.*;
/**
* Test fixture for {@link org.springframework.messaging.converter.AbstractMessageConverter}.
*
* @author Rossen Stoyanchev
*/
public class AbstractMessageConverterTests {
private TestMessageConverter converter;
@Before
public void setup() {
this.converter = new TestMessageConverter();
this.converter.setContentTypeResolver(new DefaultContentTypeResolver());
}
@Test
public void supportsTargetClass() {
Message<String> message = MessageBuilder.withPayload("ABC").build();
assertEquals("success-from", this.converter.fromMessage(message, String.class));
assertNull(this.converter.fromMessage(message, Integer.class));
}
@Test
public void supportsMimeType() {
Message<String> message = MessageBuilder.withPayload(
"ABC").setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN).build();
assertEquals("success-from", this.converter.fromMessage(message, String.class));
}
@Test
public void supportsMimeTypeNotSupported() {
Message<String> message = MessageBuilder.withPayload(
"ABC").setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.APPLICATION_JSON).build();
assertNull(this.converter.fromMessage(message, String.class));
}
@Test
public void supportsMimeTypeNotSpecified() {
Message<String> message = MessageBuilder.withPayload("ABC").build();
assertEquals("success-from", this.converter.fromMessage(message, String.class));
}
@Test
public void supportsMimeTypeNoneConfigured() {
Message<String> message = MessageBuilder.withPayload(
"ABC").setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.APPLICATION_JSON).build();
this.converter = new TestMessageConverter(Collections.<MimeType>emptyList());
this.converter.setContentTypeResolver(new DefaultContentTypeResolver());
assertEquals("success-from", this.converter.fromMessage(message, String.class));
}
@Test
public void toMessageHeadersCopied() {
Map<String, Object> map = new HashMap<String, Object>();
map.put("foo", "bar");
MessageHeaders headers = new MessageHeaders(map );
Message<?> message = this.converter.toMessage("ABC", headers);
assertEquals("bar", message.getHeaders().get("foo"));
}
@Test
public void toMessageContentTypeHeader() {
Message<?> message = this.converter.toMessage("ABC", null);
assertEquals(MimeTypeUtils.TEXT_PLAIN, message.getHeaders().get(MessageHeaders.CONTENT_TYPE));
}
private static class TestMessageConverter extends AbstractMessageConverter {
public TestMessageConverter() {
super(MimeTypeUtils.TEXT_PLAIN);
}
public TestMessageConverter(Collection<MimeType> supportedMimeTypes) {
super(supportedMimeTypes);
}
@Override
protected boolean supports(Class<?> clazz) {
return String.class.equals(clazz);
}
@Override
public Object convertFromInternal(Message<?> message, Class<?> targetClass) {
return "success-from";
}
@Override
public Object convertToInternal(Object payload, MessageHeaders headers) {
return "success-to";
}
}
}