java - How can I mock Google's Geocoding API request using mockito/powermock? -

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i want unit test method using mockito/powermock:

@service public class googleapiservice {      private static final logger logger = loggerfactory.getlogger(googleapiservice.class);      private static final string language = "es";      private list<addresstype> addresstypes = arrays.aslist(             addresstype.locality,             addresstype.administrative_area_level_2,             addresstype.administrative_area_level_1,             addresstype.country     );      @autowired     private geoapicontext geoapicontext;      public string getlocalityfromlatlng(latlng latlng) throws exception {         logger.debug("getlocalityfromlatlng");          geocodingresult[] geocodingresults = geocodingapi.newrequest(geoapicontext)             .latlng(latlng)             .await();         (geocodingresult geocodingresult : geocodingresults) {             addresstype addresstype = geocodingresult.types[0];             if (addresstypes.contains(addresstype)) {                 return geocodingresult.formattedaddress;             }         }         return stringutils.empty;     }  }

this have tried:

@preparefortest(geocodingapi.class) public class googleapiserviceunittest extends abstractunittest {      private static final double latitude = -38.010403;     private static final double longitude = -57.558408;      @mock     private geoapicontext geoapicontext;      @injectmocks     private googleapiservice googleapiservice;      @test     public void testgetlocalityfromlatlng() throws exception {          latlng latlng = new latlng(latitude, longitude);         geocodingresult geocodingresult = new geocodingresult();         geocodingresult[] geocodingresults = new geocodingresult[] { geocodingresult };          geocodingapirequest geocodingapirequest = new geocodingapirequest(geoapicontext);         geocodingapirequest.latlng(latlng);          mockstatic(geocodingapi.class);          // when(geocodingapi.newrequest(geoapicontext))            //  .thenreturn(geocodingapirequest);          // when(geocodingapi.newrequest(geoapicontext).latlng(latlng))            //  .thenreturn(geocodingapirequest);          when(geocodingapi.newrequest(geoapicontext).latlng(latlng).await())             .thenreturn(geocodingresults);          string locality = googleapiservice.getlocalityfromlatlng(latlng);          assertthat(locality, is(notnullvalue()));          verifystatic(times(1));         geocodingapi.newrequest(geoapicontext).latlng(latlng).await();          verifynomoreinteractions(geoapicontext);     }  }

i'm getting nullpointerexception. here stack trace:

java.lang.nullpointerexception @ com.google.maps.pendingresultbase.await(pendingresultbase.java:56) @ com.beermap.server.unit.service.googleapiserviceunittest.testgetlocalityfromlatlng(googleapiserviceunittest.java:57) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ org.junit.internal.runners.testmethod.invoke(testmethod.java:68) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$powermockjunit44methodrunner.runtestmethod(powermockjunit44runnerdelegateimpl.java:310) @ org.junit.internal.runners.methodroadie$2.run(methodroadie.java:89) @ org.junit.internal.runners.methodroadie.runbeforesthentestthenafters(methodroadie.java:97) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$powermockjunit44methodrunner.executetest(powermockjunit44runnerdelegateimpl.java:294) @ org.powermock.modules.junit4.internal.impl.powermockjunit47runnerdelegateimpl$powermockjunit47methodrunner.executetestinsuper(powermockjunit47runnerdelegateimpl.java:127) @ org.powermock.modules.junit4.internal.impl.powermockjunit47runnerdelegateimpl$powermockjunit47methodrunner.executetest(powermockjunit47runnerdelegateimpl.java:82) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$powermockjunit44methodrunner.runbeforesthentestthenafters(powermockjunit44runnerdelegateimpl.java:282) @ org.junit.internal.runners.methodroadie.runtest(methodroadie.java:87) @ org.junit.internal.runners.methodroadie.run(methodroadie.java:50) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl.invoketestmethod(powermockjunit44runnerdelegateimpl.java:207) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl.runmethods(powermockjunit44runnerdelegateimpl.java:146) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$1.run(powermockjunit44runnerdelegateimpl.java:120) @ org.junit.internal.runners.classroadie.rununprotected(classroadie.java:34) @ org.junit.internal.runners.classroadie.runprotected(classroadie.java:44) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl.run(powermockjunit44runnerdelegateimpl.java:122) @ org.powermock.modules.junit4.common.internal.impl.junit4testsuitechunkerimpl.run(junit4testsuitechunkerimpl.java:106) @ org.powermock.modules.junit4.common.internal.impl.abstractcommonpowermockrunner.run(abstractcommonpowermockrunner.java:53) @ org.powermock.modules.junit4.powermockrunner.run(powermockrunner.java:59) @ org.junit.runner.junitcore.run(junitcore.java:137) @ com.intellij.junit4.junit4ideatestrunner.startrunnerwithargs(junit4ideatestrunner.java:78) @ com.intellij.rt.execution.junit.junitstarter.preparestreamsandstart(junitstarter.java:212) @ com.intellij.rt.execution.junit.junitstarter.main(junitstarter.java:68) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ com.intellij.rt.execution.application.appmain.main(appmain.java:140)

is in await() call line

edit: how looks now, still not working

btw, @runwith(powermockrunner.class) in abstractunittest

@test public void testgetlocalityfromlatlng() throws exception {      latlng latlng = new latlng(latitude, longitude);     geocodingresult geocodingresult = new geocodingresult();     geocodingresult.types = new addresstype[] { addresstype.locality };     geocodingresult.formattedaddress = formatted_address;     geocodingresult[] geocodingresults = new geocodingresult[] { geocodingresult };      geocodingapirequest geocodingapirequest = mock(geocodingapirequest.class);      mockstatic(geocodingapi.class);      when(geocodingapirequest.latlng(latlng)).thenreturn(geocodingapirequest);     when(geocodingapirequest.await()).thenreturn(geocodingresults); // npe here     when(geocodingapi.newrequest(geoapicontext)).thenreturn(geocodingapirequest);      string locality = googleapiservice.getlocalityfromlatlng(latlng);      assertthat(locality, is(notnullvalue()));      // verifystatic(times(1));     // geocodingapi.newrequest(geoapicontext).latlng(latlng).await();      // verifynomoreinteractions(geoapicontext);  }

and stack: 

java.lang.nullpointerexception @ com.google.maps.pendingresultbase.makerequest(pendingresultbase.java:79) @ com.google.maps.pendingresultbase.await(pendingresultbase.java:55) @ com.beermap.server.unit.service.googleapiserviceunittest.testgetlocalityfromlatlng(googleapiserviceunittest.java:56) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ org.junit.internal.runners.testmethod.invoke(testmethod.java:68) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$powermockjunit44methodrunner.runtestmethod(powermockjunit44runnerdelegateimpl.java:310) @ org.junit.internal.runners.methodroadie$2.run(methodroadie.java:89) @ org.junit.internal.runners.methodroadie.runbeforesthentestthenafters(methodroadie.java:97) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$powermockjunit44methodrunner.executetest(powermockjunit44runnerdelegateimpl.java:294) @ org.powermock.modules.junit4.internal.impl.powermockjunit47runnerdelegateimpl$powermockjunit47methodrunner.executetestinsuper(powermockjunit47runnerdelegateimpl.java:127) @ org.powermock.modules.junit4.internal.impl.powermockjunit47runnerdelegateimpl$powermockjunit47methodrunner.executetest(powermockjunit47runnerdelegateimpl.java:82) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$powermockjunit44methodrunner.runbeforesthentestthenafters(powermockjunit44runnerdelegateimpl.java:282) @ org.junit.internal.runners.methodroadie.runtest(methodroadie.java:87) @ org.junit.internal.runners.methodroadie.run(methodroadie.java:50) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl.invoketestmethod(powermockjunit44runnerdelegateimpl.java:207) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl.runmethods(powermockjunit44runnerdelegateimpl.java:146) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl$1.run(powermockjunit44runnerdelegateimpl.java:120) @ org.junit.internal.runners.classroadie.rununprotected(classroadie.java:34) @ org.junit.internal.runners.classroadie.runprotected(classroadie.java:44) @ org.powermock.modules.junit4.internal.impl.powermockjunit44runnerdelegateimpl.run(powermockjunit44runnerdelegateimpl.java:122) @ org.powermock.modules.junit4.common.internal.impl.junit4testsuitechunkerimpl.run(junit4testsuitechunkerimpl.java:106) @ org.powermock.modules.junit4.common.internal.impl.abstractcommonpowermockrunner.run(abstractcommonpowermockrunner.java:53) @ org.powermock.modules.junit4.powermockrunner.run(powermockrunner.java:59) @ org.junit.runner.junitcore.run(junitcore.java:137) @ com.intellij.junit4.junit4ideatestrunner.startrunnerwithargs(junit4ideatestrunner.java:78) @ com.intellij.rt.execution.junit.junitstarter.preparestreamsandstart(junitstarter.java:212) @ com.intellij.rt.execution.junit.junitstarter.main(junitstarter.java:68) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ com.intellij.rt.execution.application.appmain.main(appmain.java:140)

thanks in advance

there several mistakes here , show have misunderstanding of mocking. let analyse them:

at first, hope it's copy-past mistake, don't have @runwith(powermockrunner.class), otherwise you'll exception.

second point, commented out line right when(geocodingapi.newrequest(geoapicontext)).thenreturn(geocodingapirequest);. when static method of geocodingapithen want return geocodingapirequest.

at last, important point, line incorrect: when(geocodingapi.newrequest(geoapicontext).latlng(latlng).await()).thenreturn(geocodingresults);

only 1 static call mocked here: geocodingapi.newrequest(geoapicontext).

and instance of object return, because create new instance geocodingapirequest geocodingapirequest = new geocodingapirequest(geoapicontext);.

the latlng(latlng) method called object. , it's call, not mocked. seems me want mock it.

then let's mock it: geocodingapirequest geocodingapirequest = mock(geocodingapirequest.class);

after. mock calls need mocked: 

when(geocodingapirequest.latlng(latlng)).thenreturn(geocodingapirequest); when(geocodingapirequest.await()).thenreturn(geocodingresults);

another mistake, important previous , more obviously: required files isn't set geocodingresult. 

geocodingresult geocodingresult = new geocodingresult(); geocodingresult.types = new addresstype[]{ addresstype.locality}; geocodingresult.formattedaddress = "some address";

the full working test: 

@runwith(powermockrunner.class) @preparefortest({geocodingapi.class, geocodingapirequest.class}) public class googleapiserviceunittest  {      private static final double latitude = -38.010403;     private static final double longitude = -57.558408;      @mock     private geoapicontext geoapicontext;      @injectmocks     private googleapiservice googleapiservice;      @test     public void testgetlocalityfromlatlng() throws exception {          latlng latlng = new latlng(latitude, longitude);         geocodingresult geocodingresult = new geocodingresult();         geocodingresult.types = new addresstype[]{ addresstype.locality};         geocodingresult.formattedaddress = "some address";          geocodingresult[] geocodingresults = new geocodingresult[] { geocodingresult };          geocodingapirequest geocodingapirequest = mock(geocodingapirequest.class);         when(geocodingapirequest.latlng(latlng)).thenreturn(geocodingapirequest);         when(geocodingapirequest.await()).thenreturn(geocodingresults);          mockstatic(geocodingapi.class);          when(geocodingapi.newrequest(eq(geoapicontext)))           .thenreturn(geocodingapirequest);          string locality = googleapiservice.getlocalityfromlatlng(latlng);          assertthat(locality, is(notnullvalue()));          verifystatic(times(1));         geocodingapi.newrequest(geoapicontext);          // add verification other mock if need          verifynomoreinteractions(geoapicontext);     } }

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