### Question:
RedisDao { public VirtualMachine findVirtualMachineByName(final String name) { return findUnique(VirtualMachine.class, "name", name); }  PhysicalMachine getPhysicalMachine(final Integer id); VirtualMachine getVirtualMachine(final Integer id); VirtualMachine findVirtualMachineByName(final String name); PhysicalMachine findPhysicalMachineByAddress(final String address); Set<VirtualMachine> findAllVirtualMachines(); Set<PhysicalMachine> findAllPhysicalMachines(); VirtualMachine save(VirtualMachine virtualMachine); PhysicalMachine save(PhysicalMachine physicalMachine); VirtualMachinesCache save(VirtualMachinesCache cache); void delete(VirtualMachine virtualMachine); void delete(PhysicalMachine physicalMachine);  }### Answer:
@Test public void test_findVirtualMachineByInexistentName() { assertNull(dao.findVirtualMachineByName("FAKE")); }