Solución:
Puede hacer esto usando Mockito para que el simulacro devuelva los parámetros correctos, verifique que realmente fueron llamados (opcionalmente especifique el número de veces), escriba el ‘resultado’ y verifique que sea correcto.
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.io.*;
import javax.servlet.http.*;
import org.apache.commons.io.FileUtils;
import org.junit.Test;
public class TestMyServlet extends Mockito{
@Test
public void testServlet() throws Exception {
HttpServletRequest request = mock(HttpServletRequest.class);
HttpServletResponse response = mock(HttpServletResponse.class);
when(request.getParameter("username")).thenReturn("me");
when(request.getParameter("password")).thenReturn("secret");
StringWriter stringWriter = new StringWriter();
PrintWriter writer = new PrintWriter(stringWriter);
when(response.getWriter()).thenReturn(writer);
new MyServlet().doPost(request, response);
verify(request, atLeast(1)).getParameter("username"); // only if you want to verify username was called...
writer.flush(); // it may not have been flushed yet...
assertTrue(stringWriter.toString().contains("My expected string"));
}
}
En primer lugar, en una aplicación real, nunca obtendría información de conexión de base de datos en un servlet; lo configuraría en su servidor de aplicaciones.
Sin embargo, hay formas de probar Servlets sin tener un contenedor en ejecución. Uno es usar objetos simulados. Spring proporciona un conjunto de simulaciones muy útiles para cosas como HttpServletRequest, HttpServletResponse, HttpServletSession, etc.
http://static.springsource.org/spring/docs/3.0.x/api/org/springframework/mock/web/package-summary.html
Con estos simulacros, puedes probar cosas como
¿Qué sucede si el nombre de usuario no está en la solicitud?
¿Qué sucede si el nombre de usuario está en la solicitud?
etc
Luego podrías hacer cosas como:
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.junit.Before;
import org.junit.Test;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
public class MyServletTest {
private MyServlet servlet;
private MockHttpServletRequest request;
private MockHttpServletResponse response;
@Before
public void setUp() {
servlet = new MyServlet();
request = new MockHttpServletRequest();
response = new MockHttpServletResponse();
}
@Test
public void correctUsernameInRequest() throws ServletException, IOException {
request.addParameter("username", "scott");
request.addParameter("password", "tiger");
servlet.doPost(request, response);
assertEquals("text/html", response.getContentType());
// ... etc
}
}
Encuentro que las pruebas de selenio son más útiles con pruebas de integración o funcionales (de un extremo a otro). Estoy trabajando tratando de usar org.springframework.mock.web, pero no estoy muy lejos. Adjunto un controlador de muestra con un jMock Banco de pruebas.
Primero, el controlador:
package com.company.admin.web;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.bind.support.SessionStatus;
import com.company.admin.domain.PaymentDetail;
import com.company.admin.service.PaymentSearchService;
import com.company.admin.service.UserRequestAuditTrail;
import com.company.admin.web.form.SearchCriteria;
/**
* Controls the interactions regarding to the refunds.
*
* @author slgelma
*
*/
@Controller
@SessionAttributes({"user", "authorization"})
public class SearchTransactionController {
public static final String SEARCH_TRANSACTION_PAGE = "searchtransaction";
private PaymentSearchService searchService;
//private Validator searchCriteriaValidator;
private UserRequestAuditTrail notifications;
@Autowired
public void setSearchService(PaymentSearchService searchService) {
this.searchService = searchService;
}
@Autowired
public void setNotifications(UserRequestAuditTrail notifications) {
this.notifications = notifications;
}
@RequestMapping(value="https://foroayuda.es/" + SEARCH_TRANSACTION_PAGE)
public String setUpTransactionSearch(Model model) {
SearchCriteria searchCriteria = new SearchCriteria();
model.addAttribute("searchCriteria", searchCriteria);
notifications.transferTo(SEARCH_TRANSACTION_PAGE);
return SEARCH_TRANSACTION_PAGE;
}
@RequestMapping(value="https://foroayuda.es/" + SEARCH_TRANSACTION_PAGE, method=RequestMethod.POST, params="cancel")
public String cancelSearch() {
notifications.redirectTo(HomeController.HOME_PAGE);
return "redirect:/" + HomeController.HOME_PAGE;
}
@RequestMapping(value="https://foroayuda.es/" + SEARCH_TRANSACTION_PAGE, method=RequestMethod.POST, params="execute")
public String executeSearch(
@ModelAttribute("searchCriteria") @Valid SearchCriteria searchCriteria,
BindingResult result, Model model,
SessionStatus status) {
//searchCriteriaValidator.validate(criteria, result);
if (result.hasErrors()) {
notifications.transferTo(SEARCH_TRANSACTION_PAGE);
return SEARCH_TRANSACTION_PAGE;
} else {
PaymentDetail payment =
searchService.getAuthorizationFor(searchCriteria.geteWiseTransactionId());
if (payment == null) {
ObjectError error = new ObjectError(
"eWiseTransactionId", "Transaction not found");
result.addError(error);
model.addAttribute("searchCriteria", searchCriteria);
notifications.transferTo(SEARCH_TRANSACTION_PAGE);
return SEARCH_TRANSACTION_PAGE;
} else {
model.addAttribute("authorization", payment);
notifications.redirectTo(PaymentDetailController.PAYMENT_DETAIL_PAGE);
return "redirect:/" + PaymentDetailController.PAYMENT_DETAIL_PAGE;
}
}
}
}
A continuación, la prueba:
package test.unit.com.company.admin.web;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import org.jmock.Expectations;
import org.jmock.Mockery;
import org.jmock.integration.junit4.JMock;
import org.jmock.integration.junit4.JUnit4Mockery;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.support.SessionStatus;
import com.company.admin.domain.PaymentDetail;
import com.company.admin.service.PaymentSearchService;
import com.company.admin.service.UserRequestAuditTrail;
import com.company.admin.web.HomeController;
import com.company.admin.web.PaymentDetailController;
import com.company.admin.web.SearchTransactionController;
import com.company.admin.web.form.SearchCriteria;
/**
* Tests the behavior of the SearchTransactionController.
* @author slgelma
*
*/
@RunWith(JMock.class)
public class SearchTransactionControllerTest {
private final Mockery context = new JUnit4Mockery();
private final SearchTransactionController controller = new SearchTransactionController();
private final PaymentSearchService searchService = context.mock(PaymentSearchService.class);
private final UserRequestAuditTrail notifications = context.mock(UserRequestAuditTrail.class);
private final Model model = context.mock(Model.class);
/**
* @throws java.lang.Exception
*/
@Before
public void setUp() throws Exception {
controller.setSearchService(searchService);
controller.setNotifications(notifications);
}
@Test
public void setUpTheSearchForm() {
final String target = SearchTransactionController.SEARCH_TRANSACTION_PAGE;
context.checking(new Expectations() {{
oneOf(model).addAttribute(
with(any(String.class)), with(any(Object.class)));
oneOf(notifications).transferTo(with(any(String.class)));
}});
String nextPage = controller.setUpTransactionSearch(model);
assertThat("Controller is not requesting the correct form",
target, equalTo(nextPage));
}
@Test
public void cancelSearchTest() {
final String target = HomeController.HOME_PAGE;
context.checking(new Expectations(){{
never(model).addAttribute(with(any(String.class)), with(any(Object.class)));
oneOf(notifications).redirectTo(with(any(String.class)));
}});
String nextPage = controller.cancelSearch();
assertThat("Controller is not requesting the correct form",
nextPage, containsString(target));
}
@Test
public void executeSearchWithNullTransaction() {
final String target = SearchTransactionController.SEARCH_TRANSACTION_PAGE;
final SearchCriteria searchCriteria = new SearchCriteria();
searchCriteria.seteWiseTransactionId(null);
final BindingResult result = context.mock(BindingResult.class);
final SessionStatus status = context.mock(SessionStatus.class);
context.checking(new Expectations() {{
allowing(result).hasErrors(); will(returnValue(true));
never(model).addAttribute(with(any(String.class)), with(any(Object.class)));
never(searchService).getAuthorizationFor(searchCriteria.geteWiseTransactionId());
oneOf(notifications).transferTo(with(any(String.class)));
}});
String nextPage = controller.executeSearch(searchCriteria, result, model, status);
assertThat("Controller is not requesting the correct form",
target, equalTo(nextPage));
}
@Test
public void executeSearchWithEmptyTransaction() {
final String target = SearchTransactionController.SEARCH_TRANSACTION_PAGE;
final SearchCriteria searchCriteria = new SearchCriteria();
searchCriteria.seteWiseTransactionId("");
final BindingResult result = context.mock(BindingResult.class);
final SessionStatus status = context.mock(SessionStatus.class);
context.checking(new Expectations() {{
allowing(result).hasErrors(); will(returnValue(true));
never(model).addAttribute(with(any(String.class)), with(any(Object.class)));
never(searchService).getAuthorizationFor(searchCriteria.geteWiseTransactionId());
oneOf(notifications).transferTo(with(any(String.class)));
}});
String nextPage = controller.executeSearch(searchCriteria, result, model, status);
assertThat("Controller is not requesting the correct form",
target, equalTo(nextPage));
}
@Test
public void executeSearchWithTransactionNotFound() {
final String target = SearchTransactionController.SEARCH_TRANSACTION_PAGE;
final String badTransactionId = "badboy";
final PaymentDetail transactionNotFound = null;
final SearchCriteria searchCriteria = new SearchCriteria();
searchCriteria.seteWiseTransactionId(badTransactionId);
final BindingResult result = context.mock(BindingResult.class);
final SessionStatus status = context.mock(SessionStatus.class);
context.checking(new Expectations() {{
allowing(result).hasErrors(); will(returnValue(false));
atLeast(1).of(model).addAttribute(with(any(String.class)), with(any(Object.class)));
oneOf(searchService).getAuthorizationFor(with(any(String.class)));
will(returnValue(transactionNotFound));
oneOf(result).addError(with(any(ObjectError.class)));
oneOf(notifications).transferTo(with(any(String.class)));
}});
String nextPage = controller.executeSearch(searchCriteria, result, model, status);
assertThat("Controller is not requesting the correct form",
target, equalTo(nextPage));
}
@Test
public void executeSearchWithTransactionFound() {
final String target = PaymentDetailController.PAYMENT_DETAIL_PAGE;
final String goodTransactionId = "100000010";
final PaymentDetail transactionFound = context.mock(PaymentDetail.class);
final SearchCriteria searchCriteria = new SearchCriteria();
searchCriteria.seteWiseTransactionId(goodTransactionId);
final BindingResult result = context.mock(BindingResult.class);
final SessionStatus status = context.mock(SessionStatus.class);
context.checking(new Expectations() {{
allowing(result).hasErrors(); will(returnValue(false));
atLeast(1).of(model).addAttribute(with(any(String.class)), with(any(Object.class)));
oneOf(searchService).getAuthorizationFor(with(any(String.class)));
will(returnValue(transactionFound));
oneOf(notifications).redirectTo(with(any(String.class)));
}});
String nextPage = controller.executeSearch(searchCriteria, result, model, status);
assertThat("Controller is not requesting the correct form",
nextPage, containsString(target));
}
}
Espero que esto ayude.
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