### Question:
OvsdbManagersRemovedCommand extends AbstractTransactionCommand { @Override public void execute(ReadWriteTransaction transaction) { for (OpenVSwitch openVSwitch : updatedOpenVSwitchRows.values()) { InstanceIdentifier<Node> ovsdbNodeIid = SouthboundMapper.createInstanceIdentifier(getOvsdbConnectionInstance().getNodeId()); deleteManagers(transaction, managerEntriesToRemove(ovsdbNodeIid,openVSwitch)); } } OvsdbManagersRemovedCommand(OvsdbConnectionInstance key,
            TableUpdates updates, DatabaseSchema dbSchema); @Override void execute(ReadWriteTransaction transaction);  }### Answer:
@SuppressWarnings("unchecked") @Test public void testExecute() throws Exception { updatedOpenVSwitchRows = new HashMap<>(); UUID uuid = mock(UUID.class); OpenVSwitch openVSwitch = mock(OpenVSwitch.class); updatedOpenVSwitchRows.put(uuid, openVSwitch); MemberModifier.field(OvsdbManagersRemovedCommand.class, "updatedOpenVSwitchRows") .set(ovsdbManagersRemovedCommand, updatedOpenVSwitchRows); PowerMockito.mockStatic(SouthboundMapper.class); OvsdbConnectionInstance ovsdbConnectionInstance = mock(OvsdbConnectionInstance.class); when(ovsdbManagersRemovedCommand.getOvsdbConnectionInstance()).thenReturn(ovsdbConnectionInstance); when(ovsdbConnectionInstance.getNodeId()).thenReturn(mock(NodeId.class)); when(SouthboundMapper.createInstanceIdentifier(any(NodeId.class))).thenReturn(mock(InstanceIdentifier.class)); doNothing().when(ovsdbManagersRemovedCommand).deleteManagers(any(ReadWriteTransaction.class), any(List.class)); doReturn(mock(List.class)).when(ovsdbManagersRemovedCommand).managerEntriesToRemove( any(InstanceIdentifier.class), any(OpenVSwitch.class)); ReadWriteTransaction transaction = mock(ReadWriteTransaction.class); ovsdbManagersRemovedCommand.execute(transaction); verify(ovsdbManagersRemovedCommand).deleteManagers(any(ReadWriteTransaction.class), any(List.class)); verify(ovsdbManagersRemovedCommand).managerEntriesToRemove(any(InstanceIdentifier.class), any(OpenVSwitch.class)); }