Add Filesystem TS -- Complete

Add the completed std::experimental::filesystem implementation and tests.
The implementation supports C++11 or newer.

The TS is built as part of 'libc++experimental.a'. Users of the TS need to
manually link this library. Building and testing the TS can be disabled using
the CMake option '-DLIBCXX_ENABLE_FILESYSTEM=OFF'.

Currently 'libc++experimental.a' is not installed by default. To turn on the
installation of the library use '-DLIBCXX_INSTALL_EXPERIMENTAL_LIBRARY=ON'.

llvm-svn: 273034

1 files changed, 88 insertions, 0 deletions

diff --git a/libcxx/test/std/experimental/filesystem/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp b/libcxx/test/std/experimental/filesystem/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp
new file mode 100644
index 00000000000..621ff8305fc
--- /dev/null
+++ b/libcxx/test/std/experimental/filesystem/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp
@@ -0,0 +1,88 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+
+// <experimental/filesystem>
+
+// bool equivalent(path const& lhs, path const& rhs);
+// bool equivalent(path const& lhs, path const& rhs, std::error_code& ec) noexcept;
+
+#include <experimental/filesystem>
+#include <type_traits>
+#include <cassert>
+
+#include "test_macros.h"
+#include "rapid-cxx-test.hpp"
+#include "filesystem_test_helper.hpp"
+
+using namespace std::experimental::filesystem;
+
+TEST_SUITE(equivalent_test_suite)
+
+TEST_CASE(signature_test)
+{
+    const path p; ((void)p);
+    std::error_code ec; ((void)ec);
+    ASSERT_NOEXCEPT(equivalent(p, p, ec));
+    ASSERT_NOT_NOEXCEPT(equivalent(p, p));
+}
+
+TEST_CASE(equivalent_test)
+{
+    struct TestCase {
+        path lhs;
+        path rhs;
+        bool expect;
+    };
+    const TestCase testCases[] = {
+        {StaticEnv::Dir, StaticEnv::Dir, true},
+        {StaticEnv::File, StaticEnv::Dir, false},
+        {StaticEnv::Dir, StaticEnv::SymlinkToDir, true},
+        {StaticEnv::Dir, StaticEnv::SymlinkToFile, false},
+        {StaticEnv::File, StaticEnv::File, true},
+        {StaticEnv::File, StaticEnv::SymlinkToFile, true},
+    };
+    for (auto& TC : testCases) {
+        std::error_code ec;
+        TEST_CHECK(equivalent(TC.lhs, TC.rhs, ec) == TC.expect);
+        TEST_CHECK(!ec);
+    }
+}
+
+TEST_CASE(equivalent_reports_double_dne)
+{
+    const path E = StaticEnv::File;
+    const path DNE = StaticEnv::DNE;
+    { // Test that no exception is thrown if one of the paths exists
+        TEST_CHECK(equivalent(E, DNE) == false);
+        TEST_CHECK(equivalent(DNE, E) == false);
+    }
+    { // Test that an exception is thrown if both paths do not exist.
+        TEST_CHECK_THROW(filesystem_error, equivalent(DNE, DNE));
+    }
+    {
+        std::error_code ec;
+        TEST_CHECK(equivalent(DNE, DNE, ec) == false);
+        TEST_CHECK(ec);
+    }
+}
+
+TEST_CASE(equivalent_is_other_succeeds)
+{
+    scoped_test_env env;
+    path const file = env.create_file("file", 42);
+    const path hl1 = env.create_hardlink(file, "hl1");
+    const path hl2 = env.create_hardlink(file, "hl2");
+    TEST_CHECK(equivalent(file, hl1));
+    TEST_CHECK(equivalent(file, hl2));
+    TEST_CHECK(equivalent(hl1, hl2));
+}
+
+TEST_SUITE_END()