# File test/test_sexp.rb, line 155
  def test_equals3_subset_match
    util_equals3 s(:a), s(s(:a), s(:b))                 # left
    util_equals3 s(:a), s(:blah, s(:a   ), s(:b))       # mid 1
    util_equals3 s(:a, 1), s(:blah, s(:a, 1), s(:b))    # mid 2
    util_equals3 @basic_sexp, s(:blah, @basic_sexp.dup, s(:b))      # mid deeper
    util_equals3 @basic_sexp, s(@basic_sexp.dup, s(:a), s(:b))      # left deeper

    util_equals3 s(:a), s(:blah, s(:blah, s(:a)))       # left deeper
  end