@Test
public void copyHeadersNullMap() {
MessageHeaderAccessor headers = new MessageHeaderAccessor();
headers.copyHeaders(null);
headers.copyHeadersIfAbsent(null);
assertEquals(0, headers.toMap().size());
}
@Test
public void wrapMessage() {
Map<String, Object> original = new HashMap<>();
original.put("foo", "bar");
original.put("bar", "baz");
GenericMessage<String> message = new GenericMessage<>("p", original);
MessageHeaderAccessor headers = new MessageHeaderAccessor(message);
Map<String, Object> actual = headers.toMap();
assertEquals(4, actual.size());
assertNotNull(actual.get(MessageHeaders.ID));
assertNotNull(actual.get(MessageHeaders.TIMESTAMP));
assertEquals("bar", actual.get("foo"));
assertEquals("baz", actual.get("bar"));
}
@Test
public void empty() {
MessageHeaderAccessor headers = new MessageHeaderAccessor();
assertEquals(Collections.emptyMap(), headers.toMap());
}