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