(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:test_description)
          op: assign_op.Equal
          rhs: {(SQ (Token id:Id.Lit_Chars val:'test read-tree into a fresh index file' span_id:6))}
          spids: [4]
        )
      ]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(test_expect_success)} {(setup)} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:20) 
          (Token id:Id.Lit_Chars val:'\techo one >a &&\n' span_id:21) (Token id:Id.Lit_Chars val:'\tgit add a &&\n' span_id:22) 
          (Token id:Id.Lit_Chars val:'\tgit commit -m initial\n' span_id:23)
        )
      }
    )
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:'non-existent index file' span_id:30))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:34) 
          (Token id:Id.Lit_Chars val:'\trm -f new-index &&\n' span_id:35) (Token id:Id.Lit_Chars val:'\tGIT_INDEX_FILE=new-index git read-tree master\n' span_id:36)
        )
      }
    )
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:'empty index file' span_id:43))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:47) 
          (Token id:Id.Lit_Chars val:'\trm -f new-index &&\n' span_id:48) (Token id:Id.Lit_Chars val:'\t> new-index &&\n' span_id:49) 
          (Token
            id: Id.Lit_Chars
            val: '\tGIT_INDEX_FILE=new-index git read-tree master\n'
            span_id: 50
          )
        )
      }
    )
    (C {(test_done)})
  ]
)