1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// REQUIRES: can-create-symlinks
10// UNSUPPORTED: c++03, c++11, c++14
11// UNSUPPORTED: no-filesystem
12// UNSUPPORTED: availability-filesystem-missing
13
14// <filesystem>
15
16// bool is_symlink(file_status s) noexcept
17// bool is_symlink(path const& p);
18// bool is_symlink(path const& p, std::error_code& ec) noexcept;
19
20#include <filesystem>
21#include <type_traits>
22#include <cassert>
23
24#include "assert_macros.h"
25#include "test_macros.h"
26#include "filesystem_test_helper.h"
27namespace fs = std::filesystem;
28using namespace fs;
29
30static void signature_test()
31{
32 file_status s; ((void)s);
33 const path p; ((void)p);
34 std::error_code ec; ((void)ec);
35 ASSERT_NOEXCEPT(is_symlink(s: s));
36 ASSERT_NOEXCEPT(is_symlink(p: p, ec&: ec));
37 ASSERT_NOT_NOEXCEPT(is_symlink(p: p));
38}
39
40static void is_symlink_status_test()
41{
42 struct TestCase {
43 file_type type;
44 bool expect;
45 };
46 const TestCase testCases[] = {
47 {.type: file_type::none, .expect: false},
48 {.type: file_type::not_found, .expect: false},
49 {.type: file_type::regular, .expect: false},
50 {.type: file_type::directory, .expect: false},
51 {.type: file_type::symlink, .expect: true},
52 {.type: file_type::block, .expect: false},
53 {.type: file_type::character, .expect: false},
54 {.type: file_type::fifo, .expect: false},
55 {.type: file_type::socket, .expect: false},
56 {.type: file_type::unknown, .expect: false}
57 };
58 for (auto& TC : testCases) {
59 file_status s(TC.type);
60 assert(is_symlink(s) == TC.expect);
61 }
62}
63
64static void static_env_test()
65{
66 static_test_env static_env;
67 struct TestCase {
68 path p;
69 bool expect;
70 };
71 const TestCase testCases[] = {
72 {static_env.File, false},
73 {static_env.Dir, false},
74 {static_env.SymlinkToFile, true},
75 {static_env.SymlinkToDir, true},
76 {static_env.BadSymlink, true}
77 };
78 for (auto& TC : testCases) {
79 assert(is_symlink(TC.p) == TC.expect);
80 }
81}
82
83static void test_exist_not_found()
84{
85 static_test_env static_env;
86 const path p = static_env.DNE;
87 assert(is_symlink(p) == false);
88 std::error_code ec;
89 assert(is_symlink(p, ec) == false);
90 assert(ec);
91}
92
93static void test_is_symlink_fails()
94{
95 scoped_test_env env;
96#ifdef _WIN32
97 // Windows doesn't support setting perms::none to trigger failures
98 // reading directories; test using a special inaccessible directory
99 // instead.
100 const path p = GetWindowsInaccessibleDir();
101 if (p.empty())
102 return;
103#else
104 const path dir = env.create_dir("dir");
105 const path p = env.create_file("dir/file", 42);
106 permissions(p: dir, prms: perms::none);
107#endif
108
109 std::error_code ec;
110 assert(is_symlink(p, ec) == false);
111 assert(ec);
112
113 TEST_THROWS_TYPE(filesystem_error, is_symlink(p));
114}
115
116int main(int, char**) {
117 signature_test();
118 is_symlink_status_test();
119 static_env_test();
120 test_exist_not_found();
121 test_is_symlink_fails();
122
123 return 0;
124}
125

source code of libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.is_symlink/is_symlink.pass.cpp