junit - Mocking HTTPSURLConnection class throws java.lang.AbstractMethodError -

i want mock following lines

static void processremotetolocal(string srcurl, string destfile) {          url fileurl = new url(srcurl);          httpsurlconnection.setdefaultsslsocketfactory(foo.getsslcontext().getsocketfactory());          httpsurlconnection.setdefaulthostnameverifier(foo.gethostnameverifier());          httpsurlconnection connection = (httpsurlconnection) fileurl.openconnection();      } 

for above code updated test class using powermockito below

@test @preparefortest({foo.class,sslsocketfactory.class}) public void shouldsettestmockservefield() throws exception {      hostnameverifier hnamemock = powermockito.mock(hostnameverifier.class);     sslsocketfactory mocksocfac = powermockito.mock(sslsocketfactory.class);     httpsurlconnection huc = powermockito.mock(httpsurlconnection.class);     foo mockcert = powermockito.mock(foo.class);     sslcontext sslmock = powermockito.mock(sslcontext.class);      final sslsocketfactory sslfac = null;      url u = powermockito.mock(url.class);     string url = "https://localhost";     powermockito.whennew(url.class).witharguments(url).thenreturn(u);      powermockito.mockstatic(foo.class);     mockito.when(foo.getsslcontext()).thenreturn(sslmock);     mockito.when(sslmock.getsocketfactory()).thenreturn(mocksocfac); 

this gives error java.lang.nullpointerexception @ last line.

can 1 suggest how fix ?

i've made test java 7, junit 4.12, mockito 1.10.19 , powermock 1.6.3

i created class code want mock:

public class httptest {      static void processremotetolocal(string srcurl, string destfile) throws exception {         url fileurl = new url(srcurl);          httpsurlconnection.setdefaultsslsocketfactory(foo.getsslcontext().getsocketfactory());          httpsurlconnection.setdefaulthostnameverifier(foo.gethostnameverifier());          httpsurlconnection connection = (httpsurlconnection) fileurl.openconnection();     } } 

i created class foo according comments above:

public class foo {     // i'm returning something, not sure how implementation (and doesn't make difference because you'll mock anyway)     public static sslcontext getsslcontext() {         try {             return sslcontext.getdefault();         } catch (nosuchalgorithmexception e) {             return null;         }     }      // i'm returning something, not sure how implementation (and doesn't make difference because you'll mock anyway)     public static hostnameverifier gethostnameverifier() {         return new hostnameverifier() {              @override             public boolean verify(string arg0, sslsession arg1) {                 return true;             }         };     } } 

as want mock code in processremotetolocal method, you'll need mock following:

• url constructor
• foo methods: getsslcontext() , gethostnameverifier()
• url.openconnection() method

so test class this:

// runwith needed powermock @runwith(powermockrunner.class) @preparefortest({ httptest.class, foo.class, sslcontext.class, url.class }) public class mytestclass {      @test     public void shouldsettestmockservefield() throws exception {         url u = powermockito.mock(url.class);         string url = "https://localhost";         // mock url constructor         powermockito.whennew(url.class).witharguments(matchers.anystring()).thenreturn(u);         // mock openconnection() method         httpsurlconnection huc = mockito.mock(httpsurlconnection.class);         mockito.when(u.openconnection()).thenreturn(huc);          // create mocks foo class         hostnameverifier hnamemock = mockito.mock(hostnameverifier.class);         sslcontext context = powermockito.mock(sslcontext.class);         sslsocketfactory mocksocfac = mockito.mock(sslsocketfactory.class);         mockito.when(context.getsocketfactory()).thenreturn(mocksocfac);          // mock foo static methods return mocks created above         powermockito.mockstatic(foo.class);         mockito.when(foo.gethostnameverifier()).thenreturn(hnamemock);         mockito.when(foo.getsslcontext()).thenreturn(context);          // call static method, code use mocked objects         // foo static methods return mocked sslcontext , hostnameverifier created above         // url.openconnecton return mocked httpsurlconnection         httptest.processremotetolocal(url, "/test.out");          // assertions need     } }