(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:test_description)
          op: assign_op.Equal
          rhs: {(SQ <'detect unwritable repository and fail correctly'>)}
          spids: [4]
        )
      ]
    )
    (C {<.>} {<'./test-lib.sh'>})
    (C {<test_expect_success>} {<setup>} 
      {
        (SQ <'\n'> <'\n'> <'\t>file &&\n'> <'\tgit add file &&\n'> <'\ttest_tick &&\n'> 
          <'\tgit commit -m initial &&\n'> <'\techo >file &&\n'> <'\tgit add file\n'> <'\n'>
        )
      }
    )
    (C {<test_expect_success>} {<POSIXPERM> <Id.Lit_Comma ','> <SANITY>} 
      {(SQ <'write-tree should notice unwritable repository'>)} 
      {
        (SQ <'\n'> <'\ttest_when_finished "chmod 775 .git/objects .git/objects/??" &&\n'> 
          <'\tchmod a-w .git/objects .git/objects/?? &&\n'> <'\ttest_must_fail git write-tree\n'>
        )
      }
    )
    (C {<test_expect_success>} {<POSIXPERM> <Id.Lit_Comma ','> <SANITY>} 
      {(SQ <'commit should notice unwritable repository'>)} 
      {
        (SQ <'\n'> <'\ttest_when_finished "chmod 775 .git/objects .git/objects/??" &&\n'> 
          <'\tchmod a-w .git/objects .git/objects/?? &&\n'> <'\ttest_must_fail git commit -m second\n'>
        )
      }
    )
    (C {<test_expect_success>} {<POSIXPERM> <Id.Lit_Comma ','> <SANITY>} 
      {(SQ <'update-index should notice unwritable repository'>)} 
      {
        (SQ <'\n'> <'\ttest_when_finished "chmod 775 .git/objects .git/objects/??" &&\n'> 
          <'\techo 6O >file &&\n'> <'\tchmod a-w .git/objects .git/objects/?? &&\n'> <'\ttest_must_fail git update-index file\n'>
        )
      }
    )
    (C {<test_expect_success>} {<POSIXPERM> <Id.Lit_Comma ','> <SANITY>} 
      {(SQ <'add should notice unwritable repository'>)} 
      {
        (SQ <'\n'> <'\ttest_when_finished "chmod 775 .git/objects .git/objects/??" &&\n'> 
          <'\techo b >file &&\n'> <'\tchmod a-w .git/objects .git/objects/?? &&\n'> <'\ttest_must_fail git add file\n'>
        )
      }
    )
    (C {<test_done>})
  ]
)