Since we declared RESTful endpoints as Java methods with annotations, normal unit testing techniques can be employed. The de facto unit testing library for Java is JUnit. (http://www.junit.org). JUnit is a simple framework used for writing repeatable tests. The following code snippet illustrates how one can test a RESTful endpoint:
public class AvailabilityResourceTest {
@Test
public void testGetAvailability() throws Exception {
AvailabilityService service = ...
AvailabilityResource resource = new AvailabilityResource(service);
WebRequest request = ...
// invalid from date
ApiResponse response = resource.getAvailability(null, "2017-01-02", "1", request);
assertEquals(Status.ERROR, response.getStatus());
assertEquals(17, response.getError().getErrorCode());
// from is after until
response = resource.getAvailability("2017-01-03", "2017-01-02", "1", request);
assertEquals(Status.ERROR, response.getStatus());
assertEquals...