test_equals3_mismatch (TestSexp)

    # File test/test_sexp.rb, line 143
      def test_equals3_mismatch
        assert_nil s() === s(:a)
        assert_nil s(:a) === s()
        assert_nil s(:blah1) === s(:blah2)
        assert_nil s(:a) === s(:a, :b)
        assert_nil s(:a, :b) === s(:a)
        assert_nil s(:a1, :b) === s(:a2, :b)
        assert_nil s(:a, :b1) === s(:a, :b2)
        assert_nil @basic_sexp === @basic_sexp.dup.push(42)
        assert_nil @basic_sexp.dup.push(42) === @basic_sexp
      end