1 files changed, 117 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/27_io/filesystem/iterators/pop.cc b/libstdc++-v3/testsuite/27_io/filesystem/iterators/pop.cc
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index 00000000000..02dc04f2ba9
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+++ b/libstdc++-v3/testsuite/27_io/filesystem/iterators/pop.cc
@@ -0,0 +1,117 @@
+// Copyright (C) 2016-2017 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++17 -lstdc++fs" }
+// { dg-do run { target c++17 } }
+// { dg-require-filesystem-ts "" }
+
+#include <filesystem>
+#include <testsuite_hooks.h>
+#include <testsuite_fs.h>
+
+namespace fs = std::filesystem;
+
+void
+test01()
+{
+  std::error_code ec;
+  fs::recursive_directory_iterator dir;
+  dir.pop(ec);  // This is undefined, but our implementation
+  VERIFY( ec ); // checks and returns an error.
+  VERIFY( dir == end(dir) );
+
+  std::error_code ec2;
+  try
+  {
+    dir.pop();
+  }
+  catch (const fs::filesystem_error& ex)
+  {
+    ec2 = ex.code();
+  }
+  VERIFY( ec2 == ec );
+}
+
+void
+test02()
+{
+  const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
+  std::error_code ec;
+  const auto p = __gnu_test::nonexistent_path();
+  create_directories(p / "d1/d2/d3");
+  for (int i = 0; i < 3; ++i)
+  {
+    fs::recursive_directory_iterator dir(p);
+    VERIFY( dir != end(dir) );
+    std::advance(dir, i);
+    VERIFY( dir != end(dir) );
+    VERIFY( dir.depth() == i );
+    ec = bad_ec;
+    dir.pop(ec);
+    VERIFY( !ec );
+    VERIFY( dir == end(dir) );
+
+    dir = fs::recursive_directory_iterator(p);
+    std::advance(dir, i);
+    VERIFY( dir != end(dir) );
+    VERIFY( dir.depth() == i );
+    dir.pop();
+    VERIFY( dir == end(dir) );
+  }
+  remove_all(p, ec);
+}
+
+void
+test03()
+{
+  const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
+  std::error_code ec;
+  const auto p = __gnu_test::nonexistent_path();
+  create_directories(p / "d1/d2/d3");
+  create_directories(p / "d1/d2/e3");
+  create_directories(p / "d1/e2/d3");
+  for (int i = 0; i < 3; ++i)
+  {
+    fs::recursive_directory_iterator dir(p);
+    std::advance(dir, i);
+    VERIFY( dir != end(dir) );
+    int expected_depth = i;
+    VERIFY( dir.depth() == expected_depth );
+    ec = bad_ec;
+    dir.pop(ec);
+    VERIFY( !ec );
+    if (dir != end(dir))
+      VERIFY( dir.depth() == (expected_depth - 1) );
+
+    dir = fs::recursive_directory_iterator(p);
+    std::advance(dir, i);
+    VERIFY( dir != end(dir) );
+    VERIFY( dir.depth() == i );
+    dir.pop();
+    if (dir != end(dir))
+      VERIFY( dir.depth() == (i -1) );
+  }
+  remove_all(p, ec);
+}
+
+int
+main()
+{
+  test01();
+  test02();
+  test03();
+}