(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:'various @{whatever} syntax tests' span_id:6))}
          spids: [4]
        )
      ]
    )
    (C {(.)} {(./test-lib.sh)})
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:setup span_id:17))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:21) 
          (Token id:Id.Lit_Chars val:'\ttest_commit one &&\n' span_id:22) (Token id:Id.Lit_Chars val:'\ttest_commit two\n' span_id:23)
        )
      }
    )
    (command.ShFunction
      name: check_at
      body: 
        (command.BraceGroup
          children: [
            (command.AndOr
              ops: [Id.Op_DAmp Id.Op_DAmp]
              children: [
                (command.Simple
                  words: [{(echo)} {(DQ ($ Id.VSub_Number '$2'))}]
                  redirects: [
                    (redir.Redir
                      op: (Token id:Id.Redir_Great val:'>' span_id:40)
                      fd: -1
                      arg_word: {(expect)}
                    )
                  ]
                )
                (command.Simple
                  words: [
                    {(git)}
                    {(log)}
                    {(-1)}
                    {(--format) (Id.Lit_Equals '=') (Id.Lit_Other '%') (s)}
                    {(DQ ($ Id.VSub_Number '$1'))}
                  ]
                  redirects: [
                    (redir.Redir
                      op: (Token id:Id.Redir_Great val:'>' span_id:61)
                      fd: -1
                      arg_word: {(actual)}
                    )
                  ]
                )
                (C {(test_cmp)} {(expect)} {(actual)})
              ]
            )
          ]
        )
    )
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:'@{0} shows current' span_id:79))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:83) 
          (Token id:Id.Lit_Chars val:'\tcheck_at @{0} two\n' span_id:84)
        )
      }
    )
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:'@{1} shows old' span_id:91))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:95) 
          (Token id:Id.Lit_Chars val:'\tcheck_at @{1} one\n' span_id:96)
        )
      }
    )
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:'@{now} shows current' span_id:103))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:107) 
          (Token id:Id.Lit_Chars val:'\tcheck_at @{now} two\n' span_id:108)
        )
      }
    )
    (C {(test_expect_success)} 
      {
        (SQ 
          (Token
            id: Id.Lit_Chars
            val: '@{2001-09-17} (before the first commit) shows old'
            span_id: 115
          )
        )
      } 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:119) 
          (Token id:Id.Lit_Chars val:'\tcheck_at @{2001-09-17} one\n' span_id:120)
        )
      }
    )
    (C {(test_expect_success)} {(SQ (Token id:Id.Lit_Chars val:'silly approxidates work' span_id:127))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:131) 
          (Token
            id: Id.Lit_Chars
            val: '\tcheck_at @{3.hot.dogs.on.2001-09-17} one\n'
            span_id: 132
          )
        )
      }
    )
    (C {(test_expect_success)} 
      {(SQ (Token id:Id.Lit_Chars val:'notice misspelled upstream' span_id:139))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:143) 
          (Token
            id: Id.Lit_Chars
            val: '\ttest_must_fail git log -1 --format=%s @{usptream}\n'
            span_id: 144
          )
        )
      }
    )
    (C {(test_expect_success)} 
      {(SQ (Token id:Id.Lit_Chars val:'complain about total nonsense' span_id:151))} 
      {
        (SQ (Token id:Id.Lit_Chars val:'\n' span_id:155) 
          (Token
            id: Id.Lit_Chars
            val: '\ttest_must_fail git log -1 --format=%s @{utter.bogosity}\n'
            span_id: 156
          )
        )
      }
    )
    (C {(test_done)})
  ]
)