(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: 
            {
              (SQ <'Two way merge with read-tree -m -u $H $M\n'> <'\n'> 
                <'This is identical to t1001, but uses -u to update the work tree as well.\n'> <'\n'>
              )
            }
          spids: [13]
        )
      ]
      spids: [13]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(.)} {(DQ ($ VSub_Name '$TEST_DIRECTORY')) (/lib-read-tree.sh)})
    (FuncDef
      name: compare_change
      body: 
        (BraceGroup
          children: [
            (SimpleCommand
              words: [
                {(sed)}
                {(-e)}
                {(SQ <'1{/^diff --git /d;}'>)}
                {(-e)}
                {(SQ <'2{/^index /d;}'>)}
                {(-e)}
                {(SQ <'/^--- /d; /^+++ /d; /^@@ /d;'>)}
                {(-e)}
                {(SQ <'s/^\\(.[0-7][0-7][0-7][0-7][0-7][0-7]\\) '>) (DQ ($ VSub_Name '$_x40')) 
                  (SQ <' /\\1 X /'>)
                }
                {(DQ ($ VSub_Number '$1'))}
              ]
              redirects: [(Redir op_id:Redir_Great fd:16777215 arg_word:{(current)} spids:[43])]
            )
            (C {(test_cmp)} {(expected)} {(current)})
          ]
          spids: [38]
        )
      spids: [33 37]
    )
    (FuncDef
      name: check_cache_at
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:clean_if_empty)
                  op: Equal
                  rhs: 
                    {
                      (CommandSubPart
                        command_list: 
                          (CommandList
                            children: [(C {(git)} {(diff-files)} {(--)} {(DQ ($ VSub_Number '$1'))})]
                          )
                        left_token: <Left_CommandSub '$('>
                        spids: [107 117]
                      )
                    }
                  spids: [106]
                )
              ]
              spids: [106]
            )
            (Case
              to_match: {(DQ ($ VSub_Name '$clean_if_empty'))}
              arms: [
                (case_arm
                  pat_list: [{(SQ )}]
                  action: [(C {(echo)} {(DQ ($ VSub_Number '$1') (': clean'))})]
                  spids: [16777215 131 140 16777215]
                )
                (case_arm
                  pat_list: [{(Lit_Other '?') (Lit_Other '*')}]
                  action: [(C {(echo)} {(DQ ($ VSub_Number '$1') (': dirty'))})]
                  spids: [143 145 154 16777215]
                )
              ]
              spids: [120 126 157]
            )
            (Case
              to_match: {(DQ ($ VSub_Number '$2') (',') ($ VSub_Name '$clean_if_empty'))}
              arms: [
                (case_arm
                  pat_list: [{(clean) (Lit_Comma ',')}]
                  action: [(C {(Lit_Other ':')})]
                  spids: [171 173 177 16777215]
                )
                (case_arm
                  pat_list: [{(clean) (Lit_Comma ',') (Lit_Other '?') (Lit_Other '*')}]
                  action: [(C {(false)})]
                  spids: [180 184 188 16777215]
                )
                (case_arm
                  pat_list: [{(dirty) (Lit_Comma ',')}]
                  action: [(C {(false)})]
                  spids: [191 193 197 16777215]
                )
                (case_arm
                  pat_list: [{(dirty) (Lit_Comma ',') (Lit_Other '?') (Lit_Other '*')}]
                  action: [(C {(Lit_Other ':')})]
                  spids: [200 204 208 16777215]
                )
              ]
              spids: [160 168 211]
            )
          ]
          spids: [103]
        )
      spids: [98 102]
    )
    (C {(test_expect_success)} {(setup)} 
      {
        (SQ <'echo frotz >frotz &&\n'> <'     echo nitfol >nitfol &&\n'> 
          <'     echo bozbar >bozbar &&\n'> <'     echo rezrov >rezrov &&\n'> <'     git update-index --add nitfol bozbar rezrov &&\n'> 
          <'     treeH=$(git write-tree) &&\n'> <'     echo treeH $treeH &&\n'> <'     git ls-tree $treeH &&\n'> <'\n'> 
          <'     echo gnusto >bozbar &&\n'> <'     git update-index --add frotz bozbar --force-remove rezrov &&\n'> 
          <'     git ls-files --stage >M.out &&\n'> <'     treeM=$(git write-tree) &&\n'> <'     echo treeM $treeM &&\n'> <'     git ls-tree $treeM &&\n'> 
          <'     sum bozbar frotz nitfol >M.sum &&\n'> <'     git diff-tree $treeH $treeM'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'1, 2, 3 - no carry forward'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >1-3.out &&\n'> 
          <'     cmp M.out 1-3.out &&\n'> <'     sum bozbar frotz nitfol >actual3.sum &&\n'> <'     cmp M.sum actual3.sum &&\n'> 
          <'     check_cache_at bozbar clean &&\n'> <'     check_cache_at frotz clean &&\n'> <'     check_cache_at nitfol clean'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'4 - carry forward local addition.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo "+100644 X 0\tyomin" >expected &&\n'> <'     echo yomin >yomin &&\n'> 
          <'     git update-index --add yomin &&\n'> <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >4.out &&\n'> 
          <'     test_might_fail git diff -U0 --no-index M.out 4.out >4diff.out &&\n'> <'     compare_change 4diff.out expected &&\n'> <'     check_cache_at yomin clean &&\n'> 
          <'     sum bozbar frotz nitfol >actual4.sum &&\n'> <'     cmp M.sum actual4.sum &&\n'> <'     echo yomin >yomin1 &&\n'> <'     diff yomin yomin1 &&\n'> 
          <'     rm -f yomin1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'5 - carry forward local addition.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     read_tree_u_must_succeed -m -u $treeH &&\n'> <'     echo yomin >yomin &&\n'> 
          <'     git update-index --add yomin &&\n'> <'     echo yomin yomin >yomin &&\n'> <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> 
          <'     git ls-files --stage >5.out &&\n'> <'     test_might_fail git diff -U0 --no-index M.out 5.out >5diff.out &&\n'> 
          <'     compare_change 5diff.out expected &&\n'> <'     check_cache_at yomin dirty &&\n'> <'     sum bozbar frotz nitfol >actual5.sum &&\n'> 
          <'     cmp M.sum actual5.sum &&\n'> <'     : dirty index should have prevented -u from checking it out. &&\n'> 
          <'     echo yomin yomin >yomin1 &&\n'> <'     diff yomin yomin1 &&\n'> <'     rm -f yomin1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'6 - local addition already has the same.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo frotz >frotz &&\n'> <'     git update-index --add frotz &&\n'> 
          <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >6.out &&\n'> <'     test_cmp M.out 6.out &&\n'> 
          <'     check_cache_at frotz clean &&\n'> <'     sum bozbar frotz nitfol >actual3.sum &&\n'> <'     cmp M.sum actual3.sum &&\n'> 
          <'     echo frotz >frotz1 &&\n'> <'     diff frotz frotz1 &&\n'> <'     rm -f frotz1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'7 - local addition already has the same.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo frotz >frotz &&\n'> <'     git update-index --add frotz &&\n'> 
          <'     echo frotz frotz >frotz &&\n'> <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >7.out &&\n'> 
          <'     test_cmp M.out 7.out &&\n'> <'     check_cache_at frotz dirty &&\n'> <'     sum bozbar frotz nitfol >actual7.sum &&\n'> 
          <'     if cmp M.sum actual7.sum; then false; else :; fi &&\n'> <'     : dirty index should have prevented -u from checking it out. &&\n'> 
          <'     echo frotz frotz >frotz1 &&\n'> <'     diff frotz frotz1 &&\n'> <'     rm -f frotz1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'8 - conflicting addition.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo frotz frotz >frotz &&\n'> <'     git update-index --add frotz &&\n'> 
          <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'9 - conflicting addition.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo frotz frotz >frotz &&\n'> <'     git update-index --add frotz &&\n'> 
          <'     echo frotz >frotz &&\n'> <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'10 - path removed.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo rezrov >rezrov &&\n'> <'     git update-index --add rezrov &&\n'> 
          <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >10.out &&\n'> <'     cmp M.out 10.out &&\n'> 
          <'     sum bozbar frotz nitfol >actual10.sum &&\n'> <'     cmp M.sum actual10.sum'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'11 - dirty path removed.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo rezrov >rezrov &&\n'> <'     git update-index --add rezrov &&\n'> 
          <'     echo rezrov rezrov >rezrov &&\n'> <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'12 - unmatching local changes being removed.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo rezrov rezrov >rezrov &&\n'> <'     git update-index --add rezrov &&\n'> 
          <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'13 - unmatching local changes being removed.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo rezrov rezrov >rezrov &&\n'> <'     git update-index --add rezrov &&\n'> 
          <'     echo rezrov >rezrov &&\n'> <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (SimpleCommand
      words: [{(cat)}]
      redirects: [
        (Redir op_id:Redir_Great fd:16777215 arg_word:{(expected)} spids:[508])
        (HereDoc
          op_id: Redir_DLess
          fd: 16777215
          body: {(DQ ('-100644 X 0\tnitfol\n') ('+100644 X 0\tnitfol\n'))}
          do_expansion: True
          here_end: EOF
          was_filled: True
          spids: [511]
        )
      ]
    )
    (C {(test_expect_success)} {(SQ <'14 - unchanged in two heads.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo nitfol nitfol >nitfol &&\n'> <'     git update-index --add nitfol &&\n'> 
          <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >14.out &&\n'> 
          <'     test_must_fail git diff -U0 --no-index M.out 14.out >14diff.out &&\n'> <'     compare_change 14diff.out expected &&\n'> <'     sum bozbar frotz >actual14.sum &&\n'> 
          <'     grep -v nitfol M.sum > expected14.sum &&\n'> <'     cmp expected14.sum actual14.sum &&\n'> <'     sum bozbar frotz nitfol >actual14a.sum &&\n'> 
          <'     if cmp M.sum actual14a.sum; then false; else :; fi &&\n'> <'     check_cache_at nitfol clean &&\n'> <'     echo nitfol nitfol >nitfol1 &&\n'> 
          <'     diff nitfol nitfol1 &&\n'> <'     rm -f nitfol1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'15 - unchanged in two heads.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo nitfol nitfol >nitfol &&\n'> <'     git update-index --add nitfol &&\n'> 
          <'     echo nitfol nitfol nitfol >nitfol &&\n'> <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >15.out &&\n'> 
          <'     test_must_fail git diff -U0 --no-index M.out 15.out >15diff.out &&\n'> <'     compare_change 15diff.out expected &&\n'> <'     check_cache_at nitfol dirty &&\n'> 
          <'     sum bozbar frotz >actual15.sum &&\n'> <'     grep -v nitfol M.sum > expected15.sum &&\n'> <'     cmp expected15.sum actual15.sum &&\n'> 
          <'     sum bozbar frotz nitfol >actual15a.sum &&\n'> <'     if cmp M.sum actual15a.sum; then false; else :; fi &&\n'> 
          <'     echo nitfol nitfol nitfol >nitfol1 &&\n'> <'     diff nitfol nitfol1 &&\n'> <'     rm -f nitfol1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'16 - conflicting local change.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo bozbar bozbar >bozbar &&\n'> <'     git update-index --add bozbar &&\n'> 
          <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'17 - conflicting local change.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo bozbar bozbar >bozbar &&\n'> <'     git update-index --add bozbar &&\n'> 
          <'     echo bozbar bozbar bozbar >bozbar &&\n'> <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'18 - local change already having a good result.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo gnusto >bozbar &&\n'> <'     git update-index --add bozbar &&\n'> 
          <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >18.out &&\n'> <'     test_cmp M.out 18.out &&\n'> 
          <'     check_cache_at bozbar clean &&\n'> <'     sum bozbar frotz nitfol >actual18.sum &&\n'> <'     cmp M.sum actual18.sum'>
        )
      }
    )
    (C {(test_expect_success)} 
      {(SQ <'19 - local change already having a good result, further modified.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo gnusto >bozbar &&\n'> <'     git update-index --add bozbar &&\n'> 
          <'     echo gnusto gnusto >bozbar &&\n'> <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >19.out &&\n'> 
          <'     test_cmp M.out 19.out &&\n'> <'     check_cache_at bozbar dirty &&\n'> <'     sum frotz nitfol >actual19.sum &&\n'> 
          <'     grep -v bozbar  M.sum > expected19.sum &&\n'> <'     cmp expected19.sum actual19.sum &&\n'> <'     sum bozbar frotz nitfol >actual19a.sum &&\n'> 
          <'     if cmp M.sum actual19a.sum; then false; else :; fi &&\n'> <'     echo gnusto gnusto >bozbar1 &&\n'> <'     diff bozbar bozbar1 &&\n'> <'     rm -f bozbar1'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'20 - no local change, use new tree.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo bozbar >bozbar &&\n'> <'     git update-index --add bozbar &&\n'> 
          <'     read_tree_u_must_succeed -m -u $treeH $treeM &&\n'> <'     git ls-files --stage >20.out &&\n'> <'     test_cmp M.out 20.out &&\n'> 
          <'     check_cache_at bozbar clean &&\n'> <'     sum bozbar frotz nitfol >actual20.sum &&\n'> <'     cmp M.sum actual20.sum'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'21 - no local change, dirty cache.'>)} 
      {
        (SQ <'rm -f .git/index nitfol bozbar rezrov frotz &&\n'> 
          <'     read_tree_u_must_succeed --reset -u $treeH &&\n'> <'     echo bozbar >bozbar &&\n'> <'     git update-index --add bozbar &&\n'> 
          <'     echo gnusto gnusto >bozbar &&\n'> <'     if read_tree_u_must_succeed -m -u $treeH $treeM; then false; else :; fi'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'DF vs DF/DF case setup.'>)} 
      {
        (SQ <'rm -f .git/index &&\n'> <'     echo DF >DF &&\n'> <'     git update-index --add DF &&\n'> 
          <'     treeDF=$(git write-tree) &&\n'> <'     echo treeDF $treeDF &&\n'> <'     git ls-tree $treeDF &&\n'> <'\n'> <'     rm -f DF &&\n'> 
          <'     mkdir DF &&\n'> <'     echo DF/DF >DF/DF &&\n'> <'     git update-index --add --remove DF DF/DF &&\n'> 
          <'     treeDFDF=$(git write-tree) &&\n'> <'     echo treeDFDF $treeDFDF &&\n'> <'     git ls-tree $treeDFDF &&\n'> 
          <'     git ls-files --stage >DFDF.out'>
        )
      }
    )
    (C {(test_expect_success)} {(SQ <'DF vs DF/DF case test.'>)} 
      {
        (SQ <'rm -f .git/index &&\n'> <'     rm -fr DF &&\n'> <'     echo DF >DF &&\n'> 
          <'     git update-index --add DF &&\n'> <'     read_tree_u_must_succeed -m -u $treeDF $treeDFDF &&\n'> 
          <'     git ls-files --stage >DFDFcheck.out &&\n'> <'     test_cmp DFDF.out DFDFcheck.out &&\n'> <'     check_cache_at DF/DF clean'>
        )
      }
    )
    (C {(test_done)})
  ]
)