[libcxx] [test] Ifdef out uses of create_fifo on windows

Restructure code in directory_entry.obs/file_type_obs.pass.cpp
and directory_entry.obs/hard_link_count.pass.cpp to reduce the
amount of ifdeffery needed.

In file_type_obs.pass.cpp, we can't inline the calls to
env.create_* into the lambda calls (e.g. "test_path(env.create_*())"),
because the lambda removes the referenced file, and the hardlink
must be created while the earlier test file exists.

In hard_link_count.pass.cpp, move restoration of the original
directory permissions to the end of the lambda, so that new
directory entries can be created after the lambda has run once.

Differential Revision: https://reviews.llvm.org/D89948

libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp

@@ -83,7 +83,9 @@ TEST_CASE(not_regular_file) {
     std::errc expected_err;
   } TestCases[] = {
       {env.create_dir("dir"), std::errc::is_a_directory},
+#ifndef _WIN32
       {env.create_fifo("fifo"), std::errc::not_supported},
+#endif
       {env.create_directory_symlink("dir", "sym"), std::errc::is_a_directory}};
 
   for (auto const& TC : TestCases) {

libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp

@@ -65,9 +65,8 @@ TEST_CASE(test_without_ec) {
   scoped_test_env env;
   path f = env.create_file("foo", 42);
   path d = env.create_dir("dir");
-  path fifo = env.create_fifo("fifo");
   path hl = env.create_hardlink("foo", "hl");
-  for (auto p : {hl, f, d, fifo}) {
+  auto test_path = [=](const path &p) {
     directory_entry e(p);
     file_status st = status(p);
     file_status sym_st = symlink_status(p);
@@ -83,7 +82,14 @@ TEST_CASE(test_without_ec) {
     TEST_CHECK(e.is_regular_file() == is_regular_file(st));
     TEST_CHECK(e.is_socket() == is_socket(st));
     TEST_CHECK(e.is_symlink() == is_symlink(sym_st));
-  }
+  };
+  test_path(f);
+  test_path(d);
+  test_path(hl);
+#ifndef _WIN32
+  path fifo = env.create_fifo("fifo");
+  test_path(fifo);
+#endif
 }
 
 TEST_CASE(test_with_ec) {
@@ -95,9 +101,8 @@ TEST_CASE(test_with_ec) {
   scoped_test_env env;
   path f = env.create_file("foo", 42);
   path d = env.create_dir("dir");
-  path fifo = env.create_fifo("fifo");
   path hl = env.create_hardlink("foo", "hl");
-  for (auto p : {hl, f, d, fifo}) {
+  auto test_path = [=](const path &p) {
     directory_entry e(p);
     std::error_code status_ec = GetTestEC();
     std::error_code sym_status_ec = GetTestEC(1);
@@ -141,7 +146,14 @@ TEST_CASE(test_with_ec) {
 
     TEST_CHECK(e.is_symlink(ec) == is_symlink(sym_st));
     TEST_CHECK(CheckEC(sym_status_ec));
-  }
+  };
+  test_path(f);
+  test_path(d);
+  test_path(hl);
+#ifndef _WIN32
+  path fifo = env.create_fifo("fifo");
+  test_path(fifo);
+#endif
 }
 
 TEST_CASE(test_with_ec_dne) {

libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp

@@ -84,13 +84,10 @@ TEST_CASE(not_regular_file) {
   scoped_test_env env;
   const path dir = env.create_dir("dir");
   const path dir2 = env.create_dir("dir/dir2");
-  const path fifo = env.create_fifo("dir/fifo");
-  const path sym_to_fifo = env.create_symlink("dir/fifo", "dir/sym");
 
   const perms old_perms = status(dir).permissions();
 
-  for (auto p : {dir2, fifo, sym_to_fifo}) {
-    permissions(dir, old_perms);
+  auto test_path = [=](const path &p) {
     std::error_code dummy_ec = GetTestEC();
     directory_entry ent(p, dummy_ec);
     TEST_CHECK(!dummy_ec);
@@ -103,7 +100,15 @@ TEST_CASE(not_regular_file) {
     TEST_CHECK(ent.hard_link_count(ec) == expect);
     TEST_CHECK(!ec);
     TEST_CHECK_NO_THROW(ent.hard_link_count());
-  }
+    permissions(dir, old_perms);
+  };
+  test_path(dir2);
+#ifndef _WIN32
+  const path fifo = env.create_fifo("dir/fifo");
+  const path sym_to_fifo = env.create_symlink("dir/fifo", "dir/sym");
+  test_path(fifo);
+  test_path(sym_to_fifo);
+#endif
 }
 
 TEST_CASE(error_reporting) {

libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy/copy.pass.cpp

@@ -67,8 +67,10 @@ TEST_CASE(test_error_reporting)
     scoped_test_env env;
     const path file = env.create_file("file1", 42);
     const path dir = env.create_dir("dir");
+#ifndef _WIN32
     const path fifo = env.create_fifo("fifo");
     TEST_REQUIRE(is_other(fifo));
+#endif
 
     const auto test_ec = GetTestEC();
 
@@ -96,6 +98,7 @@ TEST_CASE(test_error_reporting)
         TEST_REQUIRE(ec != test_ec);
         TEST_CHECK(checkThrow(dir, file, ec));
     }
+#ifndef _WIN32
     { // is_other(from)
         std::error_code ec = test_ec;
         fs::copy(fifo, dir, ec);
@@ -110,6 +113,7 @@ TEST_CASE(test_error_reporting)
         TEST_REQUIRE(ec != test_ec);
         TEST_CHECK(checkThrow(file, fifo, ec));
     }
+#endif
 }
 
 TEST_CASE(from_is_symlink)

libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy_file/copy_file.pass.cpp

@@ -73,6 +73,7 @@ TEST_CASE(test_error_reporting) {
   }
 }
 
+#ifndef _WIN32
 TEST_CASE(non_regular_file_test) {
   scoped_test_env env;
   const path fifo = env.create_fifo("fifo");
@@ -94,6 +95,7 @@ TEST_CASE(non_regular_file_test) {
   }
 
 }
+#endif
 
 TEST_CASE(test_attributes_get_copied) {
   scoped_test_env env;

libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp

@@ -97,6 +97,7 @@ TEST_CASE(equivalent_hardlink_succeeds) {
   TEST_CHECK(equivalent(hl1, hl2));
 }
 
+#ifndef _WIN32
 TEST_CASE(equivalent_is_other_succeeds) {
   scoped_test_env env;
   path const file = env.create_file("file", 42);
@@ -109,5 +110,6 @@ TEST_CASE(equivalent_is_other_succeeds) {
   TEST_CHECK(!equivalent(fifo1, fifo2));
   TEST_CHECK(equivalent(fifo1, fifo1));
 }
+#endif
 
 TEST_SUITE_END()

libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.is_empty/is_empty.pass.cpp

@@ -95,6 +95,7 @@ TEST_CASE(test_directory_access_denied)
 }
 
 
+#ifndef _WIN32
 TEST_CASE(test_fifo_fails)
 {
     scoped_test_env env;
@@ -107,5 +108,6 @@ TEST_CASE(test_fifo_fails)
 
     TEST_CHECK_THROW(filesystem_error, is_empty(fifo));
 }
+#endif
 
 TEST_SUITE_END()

libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp

@@ -114,7 +114,9 @@ TEST_CASE(status_file_types_test)
 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(_WIN32) // No support for domain sockets
         {env.create_socket("socket"), file_type::socket},
 #endif
+#ifndef _WIN32
         {env.create_fifo("fifo"), file_type::fifo}
+#endif
     };
     for (const auto& TC : cases) {
         // test non-throwing case

libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp

@@ -123,7 +123,9 @@ TEST_CASE(symlink_status_file_types_test)
 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(_WIN32) // No support for domain sockets
         {env.create_socket("socket"), file_type::socket},
 #endif
+#ifndef _WIN32
         {env.create_fifo("fifo"), file_type::fifo}
+#endif
     };
     for (const auto& TC : cases) {
         // test non-throwing case