how to write a JUnit test for Spring COntroller which deals with Authentication

[ravi tej]

Hi,

Below is the sample code of My Controller. I need to write a JUnit test method for the below method "getNextVersionBySessionKey."

@Scope("prototype")
@Controller
@RequestMapping("Publications")
public class PublicationController extends AbstractController {

@RequestMapping(value = "Publication/Get/NextVersion/BySessionKey/")
public @ResponseBody

ReturnStatus<String> getNextVersionBySessionKey()
throws ContentStandardSecurityException, ContentStandardException,
DaoException {
String sessionKey = (new UserInformation()).getSessionKey();
ReturnStatus<String> status = new ReturnStatus<String>(
"success");
status.setPayload(publicationDelegate
.getNextVersion(sessionKey));
return status;

}
}
}

The above method calls the "UserInformation" method to retrieve the session key. Below is the code of the class "UserInformation"

public class UserInformation {

private Authentication mAuthenticationInformation = null;

public UserInformation() {
mAuthenticationInformation = getAuthentication();
}

public String getSessionKey() throws ContentStandardSecurityException{
CoreStamdardsLoginModule.UsernamePrincipal authenticatedPrincipal = null;
try {
for (GrantedAuthority authority : mAuthenticationInformation
.getAuthorities()) {
// we are only using the first principal.
JaasGrantedAuthority jaasAuthority = (JaasGrantedAuthority) authority;
authenticatedPrincipal = (CoreStamdardsLoginModule.UsernamePrincipal) jaasAuthority
.getPrincipal();
break;
}
} catch (Exception exp) {
throw new ContentStandardSecurityException(exp.getMessage());
}
return authenticatedPrincipal.getSessionKey();
}

private Authentication getAuthentication() {

StringBuilder builder = new StringBuilder("");
Subject subject = Subject.getSubject(AccessController.getContext());
if (subject != null) {
builder.append(Subject.getSubject(AccessController.getContext())
+ " is....: " + subject);
}

Authentication auth = SecurityContextHolder.getContext()
.getAuthentication();
if (auth != null) {

builder.append("Authentication object is of type: <em>"
+ auth.getClass().getName() + "</em>");
builder.append("Authentication object as a String: <br/><br/>"
+ auth.toString());

builder.append("Authentication object holds the following granted authorities:<br /><br />");
for (GrantedAuthority authority : auth.getAuthorities()) {
builder.append(authority + "(<em>" + authority.getAuthority()
+ "</em>:" + authority.getAuthority() + "<br />");
}

builder.append("<p><b>Success! Your web filters appear to be properly configured!</b></p>");
} else {
builder.append("Authentication object is null.<br />");
builder.append("This is an error and your Spring Security application will not operate properly until corrected.<br /><br />");
}

return auth;
}
}

Could any one please guide in writing the JUnit for this controller.

Thanks in Advance.

Regards,
Ravi Teja