### Question:
FHIRBuilders { public static Practitioner buildPractitionerFromNPI(String npi) { final Practitioner practitioner = new Practitioner(); practitioner.addIdentifier().setValue(npi).setSystem(DPCIdentifierSystem.NPPES.getSystem()); return practitioner; } private  FHIRBuilders(); static Practitioner buildPractitionerFromNPI(String npi); static Patient buildPatientFromMBI(String mbi); static void addOrganizationTag(Resource resource, UUID organizationID);  }### Answer:
@Test void testProviderBuilder() { final Practitioner practitioner = FHIRBuilders.buildPractitionerFromNPI("12345"); assertAll(() -> assertEquals("12345", practitioner.getIdentifierFirstRep().getValue(), "Should have the correct value"), () -> assertEquals(DPCIdentifierSystem.NPPES.getSystem(), practitioner.getIdentifierFirstRep().getSystem(), "Should have correct system")); }