    # File test/bin/test_grep.rb, line 176
            def test_matching_0101
                    pos_arr = nil
                    @obj.instance_variable_set(:@regexp, Regexp.new(/abc/))
                    @obj.instance_eval { pos_arr = matching("") }
                    assert_equal(0, @obj.instance_eval { @match_string_count } )
                    assert_not_nil(pos_arr)
                    assert_equal(0, pos_arr.size)
            end