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 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 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 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 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
