forked from OSchip/llvm-project
129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03
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// <experimental/filesystem>
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// space_info space(const path& p);
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// space_info space(const path& p, error_code& ec) noexcept;
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#include <experimental/filesystem>
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#include <sys/statvfs.h>
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#include "test_macros.h"
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#include "rapid-cxx-test.hpp"
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#include "filesystem_test_helper.hpp"
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using namespace std::experimental::filesystem;
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bool EqualDelta(std::uintmax_t x, std::uintmax_t y, std::uintmax_t delta) {
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if (x >= y) {
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return (x - y) <= delta;
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} else {
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return (y - x) <= delta;
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}
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}
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TEST_SUITE(filesystem_space_test_suite)
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TEST_CASE(signature_test)
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{
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const path p; ((void)p);
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std::error_code ec; ((void)ec);
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ASSERT_SAME_TYPE(decltype(space(p)), space_info);
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ASSERT_SAME_TYPE(decltype(space(p, ec)), space_info);
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ASSERT_NOT_NOEXCEPT(space(p));
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ASSERT_NOEXCEPT(space(p, ec));
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}
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TEST_CASE(test_error_reporting)
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{
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auto checkThrow = [](path const& f, const std::error_code& ec)
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{
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try {
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space(f);
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return false;
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} catch (filesystem_error const& err) {
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return err.path1() == f
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&& err.path2() == ""
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&& err.code() == ec;
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}
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#else
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((void)f); ((void)ec);
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return true;
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#endif
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};
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const path cases[] = {
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"",
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StaticEnv::DNE,
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StaticEnv::BadSymlink
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};
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for (auto& p : cases) {
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const auto expect = static_cast<std::uintmax_t>(-1);
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std::error_code ec;
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space_info info = space(p, ec);
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TEST_CHECK(ec);
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TEST_CHECK(info.capacity == expect);
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TEST_CHECK(info.free == expect);
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TEST_CHECK(info.available == expect);
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TEST_CHECK(checkThrow(p, ec));
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}
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}
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TEST_CASE(basic_space_test)
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{
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// All the test cases should reside on the same filesystem and therefore
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// should have the same expected result. Compute this expected result
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// one and check that it looks semi-sane.
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struct statvfs expect;
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TEST_REQUIRE(::statvfs(StaticEnv::Dir.c_str(), &expect) != -1);
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TEST_CHECK(expect.f_bavail > 0);
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TEST_CHECK(expect.f_bfree > 0);
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TEST_CHECK(expect.f_bsize > 0);
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TEST_CHECK(expect.f_blocks > 0);
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TEST_REQUIRE(expect.f_frsize > 0);
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auto do_mult = [&](std::uintmax_t val) {
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std::uintmax_t fsize = expect.f_frsize;
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std::uintmax_t new_val = val * fsize;
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TEST_CHECK(new_val / fsize == val); // Test for overflow
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return new_val;
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};
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const std::uintmax_t bad_value = static_cast<std::uintmax_t>(-1);
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const std::uintmax_t expect_capacity = do_mult(expect.f_blocks);
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const std::uintmax_t expect_free = do_mult(expect.f_bfree);
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const std::uintmax_t expect_avail = do_mult(expect.f_bavail);
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// Other processes running on the operating system may have changed
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// the amount of space available. Check that these are within tolerances.
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// Currently 5% of capacity
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const std::uintmax_t delta = expect_capacity / 20;
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const path cases[] = {
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StaticEnv::File,
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StaticEnv::Dir,
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StaticEnv::Dir2,
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StaticEnv::SymlinkToFile,
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StaticEnv::SymlinkToDir
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};
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for (auto& p : cases) {
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std::error_code ec = GetTestEC();
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space_info info = space(p, ec);
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TEST_CHECK(!ec);
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TEST_CHECK(info.capacity != bad_value);
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TEST_CHECK(expect_capacity == info.capacity);
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TEST_CHECK(info.free != bad_value);
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TEST_CHECK(EqualDelta(expect_free, info.free, delta));
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TEST_CHECK(info.available != bad_value);
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TEST_CHECK(EqualDelta(expect_avail, info.available, delta));
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}
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}
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TEST_SUITE_END()
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