/*
* Copyright 2002-2014 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.support;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.util.IdGenerator;
import static org.junit.Assert.*;
/**
* @author Mark Fisher
* @author Rossen Stoyanchev
*/
public class MessageBuilderTests {
@Rule
public final ExpectedException thrown = ExpectedException.none();
@Test
public void testSimpleMessageCreation() {
Message<String> message = MessageBuilder.withPayload("foo").build();
assertEquals("foo", message.getPayload());
}
@Test
public void testHeaderValues() {
Message<String> message = MessageBuilder.withPayload("test")
.setHeader("foo", "bar")
.setHeader("count", 123)
.build();
assertEquals("bar", message.getHeaders().get("foo", String.class));
assertEquals(new Integer(123), message.getHeaders().get("count", Integer.class));
}
@Test
public void testCopiedHeaderValues() {
Message<String> message1 = MessageBuilder.withPayload("test1")
.setHeader("foo", "1")
.setHeader("bar", "2")
.build();
Message<String> message2 = MessageBuilder.withPayload("test2")
.copyHeaders(message1.getHeaders())
.setHeader("foo", "42")
.setHeaderIfAbsent("bar", "99")
.build();
assertEquals("test1", message1.getPayload());
assertEquals("test2", message2.getPayload());
assertEquals("1", message1.getHeaders().get("foo"));
assertEquals("42", message2.getHeaders().get("foo"));
assertEquals("2", message1.getHeaders().get("bar"));
assertEquals("2", message2.getHeaders().get("bar"));
}
@Test(expected = IllegalArgumentException.class)
public void testIdHeaderValueReadOnly() {
UUID id = UUID.randomUUID();
MessageBuilder.withPayload("test").setHeader(MessageHeaders.ID, id);
}
@Test(expected = IllegalArgumentException.class)
public void testTimestampValueReadOnly() {
Long timestamp = 12345L;
MessageBuilder.withPayload("test").setHeader(MessageHeaders.TIMESTAMP, timestamp).build();
}
@Test
public void copyHeadersIfAbsent() {
Message<String> message1 = MessageBuilder.withPayload("test1")
.setHeader("foo", "bar").build();
Message<String> message2 = MessageBuilder.withPayload("test2")
.setHeader("foo", 123)
.copyHeadersIfAbsent(message1.getHeaders())
.build();
assertEquals("test2", message2.getPayload());
assertEquals(123, message2.getHeaders().get("foo"));
}
@Test
public void createFromMessage() {
Message<String> message1 = MessageBuilder.withPayload("test")
.setHeader("foo", "bar").build();
Message<String> message2 = MessageBuilder.fromMessage(message1).build();
assertEquals("test", message2.getPayload());
assertEquals("bar", message2.getHeaders().get("foo"));
}
@Test
public void createIdRegenerated() {
Message<String> message1 = MessageBuilder.withPayload("test")
.setHeader("foo", "bar").build();
Message<String> message2 = MessageBuilder.fromMessage(message1).setHeader("another", 1).build();
assertEquals("bar", message2.getHeaders().get("foo"));
assertNotSame(message1.getHeaders().getId(), message2.getHeaders().getId());
}
@Test
public void testRemove() {
Message<Integer> message1 = MessageBuilder.withPayload(1)
.setHeader("foo", "bar").build();
Message<Integer> message2 = MessageBuilder.fromMessage(message1)
.removeHeader("foo")
.build();
assertFalse(message2.getHeaders().containsKey("foo"));
}
@Test
public void testSettingToNullRemoves() {
Message<Integer> message1 = MessageBuilder.withPayload(1)
.setHeader("foo", "bar").build();
Message<Integer> message2 = MessageBuilder.fromMessage(message1)
.setHeader("foo", null)
.build();
assertFalse(message2.getHeaders().containsKey("foo"));
}
@Test
public void testNotModifiedSameMessage() throws Exception {
Message<?> original = MessageBuilder.withPayload("foo").build();
Message<?> result = MessageBuilder.fromMessage(original).build();
assertEquals(original, result);
}
@Test
public void testContainsHeaderNotModifiedSameMessage() throws Exception {
Message<?> original = MessageBuilder.withPayload("foo").setHeader("bar", 42).build();
Message<?> result = MessageBuilder.fromMessage(original).build();
assertEquals(original, result);
}
@Test
public void testSameHeaderValueAddedNotModifiedSameMessage() throws Exception {
Message<?> original = MessageBuilder.withPayload("foo").setHeader("bar", 42).build();
Message<?> result = MessageBuilder.fromMessage(original).setHeader("bar", 42).build();
assertEquals(original, result);
}
@Test
public void testCopySameHeaderValuesNotModifiedSameMessage() throws Exception {
Date current = new Date();
Map<String, Object> originalHeaders = new HashMap<>();
originalHeaders.put("b", "xyz");
originalHeaders.put("c", current);
Message<?> original = MessageBuilder.withPayload("foo").setHeader("a", 123).copyHeaders(originalHeaders).build();
Map<String, Object> newHeaders = new HashMap<>();
newHeaders.put("a", 123);
newHeaders.put("b", "xyz");
newHeaders.put("c", current);
Message<?> result = MessageBuilder.fromMessage(original).copyHeaders(newHeaders).build();
assertEquals(original, result);
}
@Test
public void testBuildMessageWithMutableHeaders() {
MessageHeaderAccessor accessor = new MessageHeaderAccessor();
accessor.setLeaveMutable(true);
MessageHeaders headers = accessor.getMessageHeaders();
Message<?> message = MessageBuilder.createMessage("payload", headers);
accessor.setHeader("foo", "bar");
assertEquals("bar", headers.get("foo"));
assertSame(accessor, MessageHeaderAccessor.getAccessor(message, MessageHeaderAccessor.class));
}
@Test
public void testBuildMessageWithDefaultMutability() {
MessageHeaderAccessor accessor = new MessageHeaderAccessor();
MessageHeaders headers = accessor.getMessageHeaders();
Message<?> message = MessageBuilder.createMessage("foo", headers);
this.thrown.expect(IllegalStateException.class);
this.thrown.expectMessage("Already immutable");
accessor.setHeader("foo", "bar");
assertSame(accessor, MessageHeaderAccessor.getAccessor(message, MessageHeaderAccessor.class));
}
@Test
public void testBuildMessageWithoutIdAndTimestamp() {
MessageHeaderAccessor headerAccessor = new MessageHeaderAccessor();
headerAccessor.setIdGenerator(new IdGenerator() {
@Override
public UUID generateId() {
return MessageHeaders.ID_VALUE_NONE;
}
});
Message<?> message = MessageBuilder.createMessage("foo", headerAccessor.getMessageHeaders());
assertNull(message.getHeaders().getId());
assertNull(message.getHeaders().getTimestamp());
}
@Test
public void testBuildMultipleMessages() {
MessageHeaderAccessor headerAccessor = new MessageHeaderAccessor();
MessageBuilder<?> messageBuilder = MessageBuilder.withPayload("payload").setHeaders(headerAccessor);
headerAccessor.setHeader("foo", "bar1");
Message<?> message1 = messageBuilder.build();
headerAccessor.setHeader("foo", "bar2");
Message<?> message2 = messageBuilder.build();
headerAccessor.setHeader("foo", "bar3");
Message<?> message3 = messageBuilder.build();
assertEquals("bar1", message1.getHeaders().get("foo"));
assertEquals("bar2", message2.getHeaders().get("foo"));
assertEquals("bar3", message3.getHeaders().get("foo"));
}
}