My first guess is that there are more than one injector around:
- you create a second injector in your servlet config?
- you have somewhere a static reference to the injector which is
not reset when a second test is run
hope this helps
On 05/22/2013 07:51 PM, Grinder wrote:
Hi,
I'm writing a unit test that tries to extract and test data
accumulated in a singleton DAO service after calling a servlet. I
don't use Guice Web and so I inject the servlet manually. And in
order to get the handle of the singleton DAO, I also inject it to
the unit test itself. Here's how the setup looks like
interface DAO { ... }
@Singleton
class RealDAO
implements DAO { ... }
@Singleton
class DummyDAO
implements DAO { ... }
class
MyRealModule extends AbstractModule {
configure()
{
bind(DAO.class).to(RealDAO.class);
}
}
class
MyServlet {
@Inject
private DAO theDAO;
public
void init(ServletConfig config) throws ServletException {
super.init(config);
Injector injector = (Injector)
config.getServletContext().getAttribute(Injector.class.getName());
injector.injectMembers(this);
}
...
}
class
TestServlet { // TestNG
Injector
injector;
@Inject DAO
tesDAO; // I don't have to make the servlet's dao public.
MyServlet
servlet;
@BeforeMethod
void setup()
{
injector = Guice.createInjector(Modules.override(new
TestSettingModule()).with(new AbstractModule() {
configure() {
bind(DAO.class).to(DummyDAO.class).in(Singleton.class);
}
}));
// set
up a ServletConfig with the injector as servlet context
attribute
servlet
= new MyServlet();
servlet.init(config); // with the injector
injector.injectMember(this); // inject to the test class
itself
}
void
testServlet() {
servlet.doPOST();
assertEqual(testDAO.getSomeValue(), expectedValue); // failed
here!!!
}
}
The testServlet failed because injector creates two different
instances of DummyDAO and so the servlet is talking to one and the
test is examing its own.
Why would injector create two instances for object annotated with
Singleton scope? What's wrong in my setup.
Thanks!
--
You received this message because you are subscribed to the Google
Groups "google-guice" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to google-guice+unsubscr...@googlegroups.com.
To post to this group, send email to
google-guice@googlegroups.com.
Visit this group at http://groups.google.com/group/google-guice?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
You received this message because you are subscribed to the Google Groups "google-guice" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-guice+unsubscr...@googlegroups.com.
To post to this group, send email to google-guice@googlegroups.com.
Visit this group at http://groups.google.com/group/google-guice?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
|
