我想使用 mockito/powermock 对该方法进行单元测试:
@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();
for (GeocodingResult geocodingResult : geocodingResults) {
AddressType addressType = geocodingResult.types[0];
if (addressTypes.contains(addressType)) {
return geocodingResult.formattedAddress;
}
}
return StringUtils.EMPTY;
}
}
这是我试过的:
@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);
}
}
我收到 NullPointerException。这是堆栈跟踪:
java.lang.NullPointerException
at com.google.maps.PendingResultBase.await(PendingResultBase.java:56)
at com.beermap.server.unit.service.GoogleApiServiceUnitTest.testGetLocalityFromLatLng(GoogleApiServiceUnitTest.java:57)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
在 await() 调用行中
编辑:这是现在的样子，它仍然无法正常工作
顺便说一句，@RunWith(PowerMockRunner.class) 在 AbstractUnitTest 中
@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);
}
和堆栈:
java.lang.NullPointerException
at com.google.maps.PendingResultBase.makeRequest(PendingResultBase.java:79)
at com.google.maps.PendingResultBase.await(PendingResultBase.java:55)
at com.beermap.server.unit.service.GoogleApiServiceUnitTest.testGetLocalityFromLatLng(GoogleApiServiceUnitTest.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
提前致谢
最佳答案
这里有几个错误，说明你对mocking有误解。让我们分析一下:
首先，我希望这是复制过去的错误，你没有@RunWith(PowerMockRunner.class)，否则你会得到另一个异常。
第二点，这条注释掉的行是对的 when(GeocodingApi.newRequest(geoApiContext)).thenReturn(geocodingApiRequest);。当 GeocodingApi 的静态方法时，您想要返回 geocodingApiRequest。
最后，也是最重要的一点，这一行是不正确的:when(GeocodingApi.newRequest(geoApiContext).latlng(latLng).await()).thenReturn(geocodingResults);
这里只会模拟一个静态调用:GeocodingApi.newRequest(geoApiContext)。
真正对象的实例将被返回，因为你创建了一个新实例
GeocodingApiRequest geocodingApiRequest = new GeocodingApiRequest(geoApiContext);。
latlng(latLng) 方法是从真正的对象调用的。而且是真叫，不是 mock 。但在我看来你也想 mock 它。
然后让我们模拟一下:GeocodingApiRequest geocodingApiRequest = mock(GeocodingApiRequest.class);
之后。模拟所有需要模拟的调用:
when(geocodingApiRequest.latlng(latLng)).thenReturn(geocodingApiRequest);
when(geocodingApiRequest.await()).thenReturn(geocodingResults);
另一个错误，但与之前一样重要且更明显:未为 geocodingResult 设置所需的文件。
GeocodingResult geocodingResult = new GeocodingResult();
geocodingResult.types = new AddressType[]{ AddressType.LOCALITY};
geocodingResult.formattedAddress = "Some address";
完整的工作测试:
@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 you really need it
verifyNoMoreInteractions(geoApiContext);
}
}
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