resize_file.pass.cpp (3116B)
1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: c++98, c++03 11 12 // <filesystem> 13 14 // void resize_file(const path& p, uintmax_t new_size); 15 // void resize_file(const path& p, uintmax_t new_size, error_code& ec) noexcept; 16 17 #include "filesystem_include.hpp" 18 19 #include "test_macros.h" 20 #include "rapid-cxx-test.hpp" 21 #include "filesystem_test_helper.hpp" 22 23 using namespace fs; 24 25 TEST_SUITE(filesystem_resize_file_test_suite) 26 27 TEST_CASE(test_signatures) 28 { 29 const path p; ((void)p); 30 std::uintmax_t i; ((void)i); 31 std::error_code ec; ((void)ec); 32 33 ASSERT_SAME_TYPE(decltype(fs::resize_file(p, i)), void); 34 ASSERT_SAME_TYPE(decltype(fs::resize_file(p, i, ec)), void); 35 36 ASSERT_NOT_NOEXCEPT(fs::resize_file(p, i)); 37 ASSERT_NOEXCEPT(fs::resize_file(p, i, ec)); 38 } 39 40 TEST_CASE(test_error_reporting) 41 { 42 auto checkThrow = [](path const& f, std::uintmax_t s, const std::error_code& ec) 43 { 44 #ifndef TEST_HAS_NO_EXCEPTIONS 45 try { 46 fs::resize_file(f, s); 47 return false; 48 } catch (filesystem_error const& err) { 49 return err.path1() == f 50 && err.path2() == "" 51 && err.code() == ec; 52 } 53 #else 54 ((void)f); ((void)s); ((void)ec); 55 return true; 56 #endif 57 }; 58 scoped_test_env env; 59 const path dne = env.make_env_path("dne"); 60 const path bad_sym = env.create_symlink(dne, "sym"); 61 const path dir = env.create_dir("dir1"); 62 const path cases[] = { 63 dne, bad_sym, dir 64 }; 65 for (auto& p : cases) { 66 std::error_code ec; 67 resize_file(p, 42, ec); 68 TEST_REQUIRE(ec); 69 TEST_CHECK(checkThrow(p, 42, ec)); 70 } 71 } 72 73 TEST_CASE(basic_resize_file_test) 74 { 75 scoped_test_env env; 76 const path file1 = env.create_file("file1", 42); 77 const auto set_ec = std::make_error_code(std::errc::address_in_use); 78 { // grow file 79 const std::uintmax_t new_s = 100; 80 std::error_code ec = set_ec; 81 resize_file(file1, new_s, ec); 82 TEST_CHECK(!ec); 83 TEST_CHECK(file_size(file1) == new_s); 84 } 85 { // shrink file 86 const std::uintmax_t new_s = 1; 87 std::error_code ec = set_ec; 88 resize_file(file1, new_s, ec); 89 TEST_CHECK(!ec); 90 TEST_CHECK(file_size(file1) == new_s); 91 } 92 { // shrink file to zero 93 const std::uintmax_t new_s = 0; 94 std::error_code ec = set_ec; 95 resize_file(file1, new_s, ec); 96 TEST_CHECK(!ec); 97 TEST_CHECK(file_size(file1) == new_s); 98 } 99 const path sym = env.create_symlink(file1, "sym"); 100 { // grow file via symlink 101 const std::uintmax_t new_s = 1024; 102 std::error_code ec = set_ec; 103 resize_file(sym, new_s, ec); 104 TEST_CHECK(!ec); 105 TEST_CHECK(file_size(file1) == new_s); 106 } 107 } 108 109 TEST_SUITE_END()