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
TEST_CASE(test_signatures)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
TEST_CASE(test_error_reporting)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
TEST_CASE(basic_resize_file_test)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()
110