1// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
2// (C) Copyright 2004-2007 Jonathan Turkanis
3// Distributed under the Boost Software License, Version 1.0. (See accompanying
4// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
5
6// See http://www.boost.org/libs/iostreams for documentation.
7
8#include "detail/filters.hpp" // Must come before operations.hpp for VC6.
9#include <boost/iostreams/categories.hpp>
10#include <boost/iostreams/constants.hpp>
11#include <boost/iostreams/device/null.hpp>
12#include <boost/iostreams/operations.hpp>
13#include <boost/test/test_tools.hpp>
14#include <boost/test/unit_test.hpp>
15
16using namespace std;
17using namespace boost::iostreams;
18using namespace boost::iostreams::test;
19using boost::unit_test::test_suite;
20
21struct optimally_buffered_filter {
22 typedef char char_type;
23 struct category
24 : input_filter_tag,
25 optimally_buffered_tag
26 { };
27 std::streamsize optimal_buffer_size() const
28 { return default_filter_buffer_size + 1; }
29};
30
31void buffer_size_test()
32{
33 // Test device buffer sizes.
34
35 BOOST_CHECK_MESSAGE(
36 optimal_buffer_size(null_source()) == default_device_buffer_size,
37 "wrong buffer size for sourcer"
38 );
39 BOOST_CHECK_MESSAGE(
40 optimal_buffer_size(null_sink()) == default_device_buffer_size,
41 "wrong buffer size for sink"
42 );
43
44 // Test filter buffer sizes.
45
46 BOOST_CHECK_MESSAGE(
47 optimal_buffer_size(toupper_filter()) == default_filter_buffer_size,
48 "wrong buffer size for input filter"
49 );
50 BOOST_CHECK_MESSAGE(
51 optimal_buffer_size(tolower_filter()) == default_filter_buffer_size,
52 "wrong buffer size for output filter"
53 );
54 BOOST_CHECK_MESSAGE(
55 optimal_buffer_size(toupper_multichar_filter())
56 ==
57 default_filter_buffer_size,
58 "wrong buffer size for multi-character input filter"
59 );
60 BOOST_CHECK_MESSAGE(
61 optimal_buffer_size(tolower_multichar_filter())
62 ==
63 default_filter_buffer_size,
64 "wrong buffer size for multi-character output filter"
65 );
66
67 // Test custom buffer size.
68
69 BOOST_CHECK_MESSAGE(
70 optimal_buffer_size(optimally_buffered_filter())
71 ==
72 optimally_buffered_filter().optimal_buffer_size(),
73 "wrong buffer size for multi-character output filter"
74 );
75}
76
77test_suite* init_unit_test_suite(int, char* [])
78{
79 test_suite* test = BOOST_TEST_SUITE("buffer_size test");
80 test->add(BOOST_TEST_CASE(&buffer_size_test));
81 return test;
82}
83

source code of boost/libs/iostreams/test/buffer_size_test.cpp