.
----------------------------------------------------------------------
Ran 1 test in 0.001s

OK
(C {(ls)} {(foo)})
(arg_vector strs:[ls foo] spids:[0 2])
(C {(ls)} {(Lit_Other '[') ($ VSub_DollarName '$x') (Lit_Other ']')} {($ VSub_DollarName '$y')} 
  {(core/a) (Lit_Other '*') (.py)}
)(command.SimpleCommand
  words: [
    (word.CompoundWord
      parts: [(word_part.LiteralPart token:(token id:Lit_Chars val:ls span_id:0))]
    )
    (word.CompoundWord
      parts: [
        (word_part.LiteralPart token:(token id:Lit_Other val:'[' span_id:2))
        (word_part.SimpleVarSub token:(token id:VSub_DollarName val:'$x' span_id:3))
        (word_part.LiteralPart token:(token id:Lit_Other val:']' span_id:4))
      ]
    )
    (word.CompoundWord
      parts: [(word_part.SimpleVarSub token:(token id:VSub_DollarName val:'$y' span_id:6))]
    )
    (word.CompoundWord
      parts: [
        (word_part.LiteralPart token:(token id:Lit_Chars val:core/a span_id:8))
        (word_part.LiteralPart token:(token id:Lit_Other val:'*' span_id:9))
        (word_part.LiteralPart token:(token id:Lit_Chars val:.py span_id:10))
      ]
    )
  ]
)

(arg_vector
  strs: [ls '[-' -- '---]' y yy core/alloc.py core/alloc_test.py core/asdl_gen.py]
  spids: [0 2 2 2 6 6 8 8 8]
)