objectMapper.writeValueAsString giving null pointer exception - junit

Question

i am trying to write test case for below controller its working fine,But problem is when i run unit test case then its showing null pointer exception in controller class at (LOGGER.info("========>request is------>" + objectMapper.writeValueAsString(basBaaisnEvcIdRequest));
can some one help me please how can i resolve this problem
controller
#RequestMapping(value = "/api/baaisn/queryevcid", produces = MediaType.APPLICATION_JSON_VALUE, method = RequestMethod.POST)
#ResponseBody
public BaaisnEvcIdResponse getQueryEvcid(#RequestBody BaaisnEvcIdRequest basBaaisnEvcIdRequest)
throws IOException, DAOException, SQLException, HttpServletException,JsonProcessingException {
LOGGER.info("========>request is------>" + objectMapper.writeValueAsString(basBaaisnEvcIdRequest));
if (basBaaisnEvcIdRequest.getLata() != 0 && (basBaaisnEvcIdRequest.getProduct_type() != null
&& !basBaaisnEvcIdRequest.getProduct_type().equalsIgnoreCase(""))) {
BaaisnEvcIdResponse baaisnEvcIdResponse = BaaisnEvcIdMSService.getQueryEvcidService(basBaaisnEvcIdRequest);
return baaisnEvcIdResponse;
} else {
BaaisnEvcIdResponse basiBaaisnEvcIdResponse = new BaaisnEvcIdResponse();
basiBaaisnEvcIdResponse.setStatus_code(0);
if (basBaaisnEvcIdRequest.getProduct_type() == null || basBaaisnEvcIdRequest.getProduct_type().equals("")) {
basiBaaisnEvcIdResponse.setStatus_desc("Please send Product type");
} else if (basBaaisnEvcIdRequest.getLata() == 0) {
basiBaaisnEvcIdResponse.setStatus_desc("Please send Lata");
}
return basiBaaisnEvcIdResponse;
}
}
Test class
#InjectMocks
BaaisnEvcIdMSController baaisnEvcIdMSController;
#Mock
BaaisnEvcIdMSService baaisnEvcIdMSService;
#Before
public void setup() {
MockitoAnnotations.initMocks(this);
}
#Test
public void getQueryEvcid() throws
IOException, DAOException, SQLException, HttpServletException,JsonProcessingException{
//Request object
BaaisnEvcIdRequest baaisnEvcIdRequest = mock(BaaisnEvcIdRequest.class);
Mockito.when(baaisnEvcIdRequest.getLata()).thenReturn(620);
Mockito.when(baaisnEvcIdRequest.getProduct_type()).thenReturn("LEVC");
Mockito.when(baaisnEvcIdRequest.getSvc_type()).thenReturn("EMS");
//Response object
BaaisnEvcIdResponse basiBaaisnEvcIdResponse = mock(BaaisnEvcIdResponse.class);
Mockito.when(basiBaaisnEvcIdResponse.getEvc_id()).thenReturn("/TLSM/100020218/001");
Mockito.when(basiBaaisnEvcIdResponse.getStatus_code()).thenReturn(1);
Mockito.when(basiBaaisnEvcIdResponse.getStatus_desc()).thenReturn("Success");
Mockito.when(baaisnEvcIdMSService.getQueryEvcidService(Mockito.any()))
.thenReturn(basiBaaisnEvcIdResponse);
BaaisnEvcIdResponse mockResponse = baaisnEvcIdMSController.getQueryEvcid(baaisnEvcIdRequest);
assertEquals("Success", mockResponse.getStatus_desc());
assertEquals("/TLSM/100020218/001", mockResponse.getEvc_id());
}
exception
java.lang.NullPointerException
at com.verizon.uts.ms.cdm.baaisn.evcid.controller.BaaisnEvcIdMSController.getQueryEvcid(BaaisnEvcIdMSController.java:44)
at com.verizon.uts.ms.cdm.baaisn.evcid.controller.BaaisnEvcIdMSControllerTest.getQueryEvcid(BaaisnEvcIdMSControllerTest.java:59)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:40)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:80)
at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:71)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:137)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)