(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:test_description)
          op: assign_op.Equal
          rhs: {(SQ <'git update-index --assume-unchanged test.\n'>)}
          spids: [4]
        )
      ]
    )
    (C {<.>} {<'./test-lib.sh'>})
    (C {<test_expect_success>} {(SQ <setup>)} 
      {
        (SQ <': >file &&\n'> <'\t git add file &&\n'> <'\t git commit -m initial &&\n'> 
          <'\t git branch other &&\n'> <'\t echo upstream >file &&\n'> <'\t git add file &&\n'> <'\t git commit -m upstream'>
        )
      }
    )
    (C {<test_expect_success>} {(SQ <'do not switch branches with dirty file'>)} 
      {
        (SQ <'git reset --hard &&\n'> <'\t git checkout other &&\n'> <'\t echo dirt >file &&\n'> 
          <'\t git update-index --assume-unchanged file &&\n'> <'\t test_must_fail git checkout master'>
        )
      }
    )
    (C {<test_done>})
  ]
)