(command.CommandList
  children: [
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (lhs_expr.LhsName name:test_description spids:[12])
          op: Equal
          rhs: {(SQ <'merge can handle submodules'>)}
          spids: [12]
        )
      ]
      spids: [12]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(.)} {(DQ ($ VSub_Name '$TEST_DIRECTORY')) (/lib-submodule-update.sh)})
    (C {(test_submodule_switch)} {(DQ ('git merge'))})
    (C {(test_submodule_switch)} {(DQ ('git merge --ff'))})
    (C {(test_submodule_switch)} {(DQ ('git merge --ff-only'))})
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: 
            (lhs_expr.LhsName
              name: KNOWN_FAILURE_NOFF_MERGE_DOESNT_CREATE_EMPTY_SUBMODULE_DIR
              spids: [54]
            )
          op: Equal
          rhs: {(1)}
          spids: [54]
        )
      ]
      spids: [54]
    )
    (command.Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: 
            (lhs_expr.LhsName
              name: KNOWN_FAILURE_NOFF_MERGE_ATTEMPTS_TO_MERGE_REMOVED_SUBMODULE_FILES
              spids: [57]
            )
          op: Equal
          rhs: {(1)}
          spids: [57]
        )
      ]
      spids: [57]
    )
    (C {(test_submodule_switch)} {(DQ ('git merge --no-ff'))})
    (C {(test_done)})
  ]
)