Spring3 and REST Integration(II)

Spring3 and REST Integration(II)

5. How to test that service
I use RestTemplate to communicate with REST services, just now, I configured that in
controller-easyrestproxy-context.xml file:
<!-- Client -->
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
<property name="messageConverters">
<list>
<ref bean="jsonConverter" />
</list>
</property>
</bean>

RestTemplate supports other methods, including:
exchange: executes certain HTTP methods with request body and gets the response.
getForObject: executes the HTTP GET method and gets the response as an object.
postForObject: executes the HTTP POST method with a certain request body.
put: executes the HTTP PUT method with a certain request body.
delete: executes the HTTP DELETE method for a certain URI.

6. My junit test case will be like this PersonControllerTest.java:
package com.sillycat.easyrestproxy.controller;

import java.util.Date;
import java.util.List;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

import com.sillycat.core.BaseTestCase;
import com.sillycat.easyjpa.model.Person;
import com.sillycat.easyrestproxy.model.PersonList;

public class PersonControllerTest extends BaseTestCase
{

private RestTemplate restTemplate;

private static final String SERVER_URL = "http://localhost:8080/easyrestproxy";

private Person item;

private HttpEntity<String> entity_get;

public void setUp() throws Exception
{
super.setUp();
restTemplate = (RestTemplate) ctx.getBean("restTemplate");
item = getItem();
entity_get = prepareGet(MediaType.APPLICATION_JSON);
}

public void tearDown() throws Exception
{
super.tearDown();
if (item != null && item.getId() != null)
{
restTemplate.delete(SERVER_URL + "/service/person/{id}", item.getId());
}
}

public void testDumy()
{
assertNotNull(true);
}

public void testGet()
{
ResponseEntity<Person> response = restTemplate.exchange(SERVER_URL + "/service/person/1", HttpMethod.GET, entity_get, Person.class);
assertNotNull(response);
Person p = response.getBody();
assertNotNull(p);
assertNotNull(p.getId());
assertNotNull(p.getName());
}

public void testGetAll()
{
ResponseEntity<PersonList> response = restTemplate.exchange(SERVER_URL + "/service/persons", HttpMethod.GET, entity_get, PersonList.class);

assertNotNull(response);
PersonList persons = response.getBody();
assertNotNull(persons);
assertTrue(persons.getAmount() > 0);
List<Person> list = persons.getPersons();
for (int i = 0; i < list.size(); i++)
{
Person p = list.get(i);
assertNotNull(p);
assertNotNull(p.getId());
assertNotNull(p.getName());
}
}

public void testAdd()
{
HttpEntity<Person> entity = new HttpEntity<Person>(item);
ResponseEntity<Person> response = restTemplate.postForEntity(SERVER_URL + "/service/person", entity, Person.class);
assertNotNull(response);
Person p = response.getBody();
assertNotNull(p);
assertNotNull(p.getId());
item.setId(p.getId());
}

public void testUpdate()
{
// add
HttpEntity<Person> entity = new HttpEntity<Person>(item);
ResponseEntity<Person> response = restTemplate.postForEntity(SERVER_URL + "/service/person", entity, Person.class);
assertNotNull(response);
Person p = response.getBody();
assertNotNull(p);
assertNotNull(p.getId());
item.setId(p.getId());

// update
item.setName("fire in the hole");
entity = new HttpEntity<Person>(item);
restTemplate.put(SERVER_URL + "/service/person/{id}", entity, item.getId());

// get
response = restTemplate.exchange(SERVER_URL + "/service/person/" + item.getId(), HttpMethod.GET, entity_get, Person.class);
assertNotNull(response);
Person t = response.getBody();
assertNotNull(t);
assertNotNull(t.getId());
assertNotNull(t.getName());
assertEquals(t.getName(), "fire in the hole");
}

private Person getItem()
{
Person p = new Person();
p.setAge((short) 1);
p.setBirthday(new Date());
p.setName("json");
return p;
}

private HttpEntity<String> prepareGet(MediaType type)
{
HttpHeaders headers = new HttpHeaders();
headers.setContentType(type);
HttpEntity<String> entity = new HttpEntity<String>(headers);
return entity;
}

}

That will work fine. My sample project named easyrestproxy.

references:
http://www.ibm.com/developerworks/web/library/wa-spring3webserv/index.html
http://www.ibm.com/developerworks/web/library/wa-restful/