### Question:
OvsdbManagersUpdateCommand extends AbstractTransactionCommand { @Override public void execute(ReadWriteTransaction transaction) { if (updatedManagerRows != null && !updatedManagerRows.isEmpty()) { Map<Uri, Manager> updatedManagerRowsWithUri = getUriManagerMap(updatedManagerRows); if (updatedOpenVSwitchRows != null && !updatedOpenVSwitchRows.isEmpty()) { updateManagers(transaction, updatedManagerRows, updatedOpenVSwitchRows); } else { updateManagers(transaction, updatedManagerRowsWithUri); } } } OvsdbManagersUpdateCommand(OvsdbConnectionInstance key,
            TableUpdates updates, DatabaseSchema dbSchema); @Override void execute(ReadWriteTransaction transaction);  }### Answer:
@Test public void testExecute() throws Exception { Map<UUID, Manager> updatedManagerRows = new HashMap<>(); updatedManagerRows.put(mock(UUID.class), mock(Manager.class)); MemberModifier.field(OvsdbManagersUpdateCommand.class, "updatedManagerRows").set(ovsdbManagersUpdateCommand, updatedManagerRows); Map<Uri, Manager> updatedManagerRowsWithUri = new HashMap<>(); PowerMockito.doReturn(updatedManagerRowsWithUri).when(ovsdbManagersUpdateCommand, "getUriManagerMap", any(Map.class)); Map<UUID, OpenVSwitch> updatedOpenVSwitchRows = new HashMap<>(); updatedOpenVSwitchRows.put(mock(UUID.class), mock(OpenVSwitch.class)); MemberModifier.field(OvsdbManagersUpdateCommand.class, "updatedOpenVSwitchRows").set(ovsdbManagersUpdateCommand, updatedOpenVSwitchRows); PowerMockito.doNothing().when(ovsdbManagersUpdateCommand, "updateManagers", any(ReadWriteTransaction.class), any(Map.class), any(Map.class)); ReadWriteTransaction transaction = mock(ReadWriteTransaction.class); ovsdbManagersUpdateCommand.execute(transaction); PowerMockito.verifyPrivate(ovsdbManagersUpdateCommand).invoke("getUriManagerMap", any(Map.class)); PowerMockito.verifyPrivate(ovsdbManagersUpdateCommand).invoke("updateManagers", any(ReadWriteTransaction.class), any(Map.class), any(Map.class)); }