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 // <experimental/filesystem>
13
14 // space_info space(const path& p);
15 // space_info space(const path& p, error_code& ec) noexcept;
16
17 #include <experimental/filesystem>
18 #include <sys/statvfs.h>
19
20 #include "test_macros.h"
21 #include "rapid-cxx-test.hpp"
22 #include "filesystem_test_helper.hpp"
23
24 using namespace std::experimental::filesystem;
25
EqualDelta(std::uintmax_t x,std::uintmax_t y,std::uintmax_t delta)26 bool EqualDelta(std::uintmax_t x, std::uintmax_t y, std::uintmax_t delta) {
27 if (x >= y) {
28 return (x - y) <= delta;
29 } else {
30 return (y - x) <= delta;
31 }
32 }
33
34 TEST_SUITE(filesystem_space_test_suite)
35
TEST_CASE(signature_test)36 TEST_CASE(signature_test)
37 {
38 const path p; ((void)p);
39 std::error_code ec; ((void)ec);
40 ASSERT_SAME_TYPE(decltype(space(p)), space_info);
41 ASSERT_SAME_TYPE(decltype(space(p, ec)), space_info);
42 ASSERT_NOT_NOEXCEPT(space(p));
43 ASSERT_NOEXCEPT(space(p, ec));
44 }
45
TEST_CASE(test_error_reporting)46 TEST_CASE(test_error_reporting)
47 {
48 auto checkThrow = [](path const& f, const std::error_code& ec)
49 {
50 #ifndef TEST_HAS_NO_EXCEPTIONS
51 try {
52 space(f);
53 return false;
54 } catch (filesystem_error const& err) {
55 return err.path1() == f
56 && err.path2() == ""
57 && err.code() == ec;
58 }
59 #else
60 ((void)f); ((void)ec);
61 return true;
62 #endif
63 };
64 const path cases[] = {
65 "",
66 StaticEnv::DNE,
67 StaticEnv::BadSymlink
68 };
69 for (auto& p : cases) {
70 const auto expect = static_cast<std::uintmax_t>(-1);
71 std::error_code ec;
72 space_info info = space(p, ec);
73 TEST_CHECK(ec);
74 TEST_CHECK(info.capacity == expect);
75 TEST_CHECK(info.free == expect);
76 TEST_CHECK(info.available == expect);
77 TEST_CHECK(checkThrow(p, ec));
78 }
79 }
80
TEST_CASE(basic_space_test)81 TEST_CASE(basic_space_test)
82 {
83 // All the test cases should reside on the same filesystem and therefore
84 // should have the same expected result. Compute this expected result
85 // one and check that it looks semi-sane.
86 struct statvfs expect;
87 TEST_REQUIRE(::statvfs(StaticEnv::Dir.c_str(), &expect) != -1);
88 TEST_CHECK(expect.f_bavail > 0);
89 TEST_CHECK(expect.f_bfree > 0);
90 TEST_CHECK(expect.f_bsize > 0);
91 TEST_CHECK(expect.f_blocks > 0);
92 TEST_REQUIRE(expect.f_frsize > 0);
93 auto do_mult = [&](std::uintmax_t val) {
94 std::uintmax_t fsize = expect.f_frsize;
95 std::uintmax_t new_val = val * fsize;
96 TEST_CHECK(new_val / fsize == val); // Test for overflow
97 return new_val;
98 };
99 const std::uintmax_t bad_value = static_cast<std::uintmax_t>(-1);
100 const std::uintmax_t expect_capacity = do_mult(expect.f_blocks);
101 const std::uintmax_t expect_free = do_mult(expect.f_bfree);
102 const std::uintmax_t expect_avail = do_mult(expect.f_bavail);
103
104 // Other processes running on the operating system may have changed
105 // the amount of space available. Check that these are within tolerances.
106 // Currently 5% of capacity
107 const std::uintmax_t delta = expect_capacity / 20;
108 const path cases[] = {
109 StaticEnv::File,
110 StaticEnv::Dir,
111 StaticEnv::Dir2,
112 StaticEnv::SymlinkToFile,
113 StaticEnv::SymlinkToDir
114 };
115 for (auto& p : cases) {
116 std::error_code ec = GetTestEC();
117 space_info info = space(p, ec);
118 TEST_CHECK(!ec);
119 TEST_CHECK(info.capacity != bad_value);
120 TEST_CHECK(expect_capacity == info.capacity);
121 TEST_CHECK(info.free != bad_value);
122 TEST_CHECK(EqualDelta(expect_free, info.free, delta));
123 TEST_CHECK(info.available != bad_value);
124 TEST_CHECK(EqualDelta(expect_avail, info.available, delta));
125 }
126 }
127
128 TEST_SUITE_END()
129