Testing Dropwizard Resources gives NPE - junit

Question

I am trying to unit test a resource by creating a ResourceTestRule as follows
#ClassRule
public static final ResourceTestRule RESOURCES =
ResourceTestRule.builder().addResource(new UserRequestsResource(edao, udao)).build();
#Test
public void invalidEnvironment_NameWithUnderscore_Returns400() throws Exception {
Entity<?> entity = Entity.entity(userRequest, MediaType.APPLICATION_JSON_TYPE);
Response response = RESOURCES.client().target(getDeploysPath()).request().post(entity);
assertEquals(response.getStatus(), 400);
assertEquals(response.getStatusInfo(), Status.BAD_REQUEST);
assertThat(response.readEntity(String.class), containsString(
"{\"Status\":\"'Invalid_Env' contains an underscore; 'Invalid_Env' contains an upper-case letter\"}"));
}
This gives an NPPE at Resource.client()
Following is the stack trace
java.lang.NullPointerException
at java.util.Objects.requireNonNull(Objects.java:203)
at io.dropwizard.testing.common.Resource.getJerseyTest(Resource.java:174)
at io.dropwizard.testing.common.Resource.client(Resource.java:164)
at io.dropwizard.testing.junit.ResourceTestRule.client(ResourceTestRule.java:80)
at com.mathworks.batup.deployer.resources.TestBadEnvironmentName.setup(TestBadEnvironmentName.java:43)
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:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
What am I missing?