1 files changed, 71 insertions, 0 deletions
diff --git a/libcxx/test/std/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp b/libcxx/test/std/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp
new file mode 100644
index 00000000000..fcc86a13ffa
--- /dev/null
+++ b/libcxx/test/std/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp
@@ -0,0 +1,71 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <fstream>
+
+// template <class charT, class traits = char_traits<charT> >
+// class basic_fstream
+
+// void swap(basic_fstream& rhs);
+
+#include <fstream>
+#include <cassert>
+#include "platform_support.h"
+
+int main()
+{
+    std::string temp1 = get_temp_file_name();
+    std::string temp2 = get_temp_file_name();
+    {
+        std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
+                                                  | std::ios_base::trunc);
+        std::fstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
+                                                  | std::ios_base::trunc);
+        fs1 << 1 << ' ' << 2;
+        fs2 << 2 << ' ' << 1;
+        fs1.seekg(0);
+        fs1.swap(fs2);
+        fs1.seekg(0);
+        int i;
+        fs1 >> i;
+        assert(i == 2);
+        fs1 >> i;
+        assert(i == 1);
+        i = 0;
+        fs2 >> i;
+        assert(i == 1);
+        fs2 >> i;
+        assert(i == 2);
+    }
+    std::remove(temp1.c_str());
+    std::remove(temp2.c_str());
+    {
+        std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
+                                                   | std::ios_base::trunc);
+        std::wfstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
+                                                   | std::ios_base::trunc);
+        fs1 << 1 << ' ' << 2;
+        fs2 << 2 << ' ' << 1;
+        fs1.seekg(0);
+        fs1.swap(fs2);
+        fs1.seekg(0);
+        int i;
+        fs1 >> i;
+        assert(i == 2);
+        fs1 >> i;
+        assert(i == 1);
+        i = 0;
+        fs2 >> i;
+        assert(i == 1);
+        fs2 >> i;
+        assert(i == 2);
+    }
+    std::remove(temp1.c_str());
+    std::remove(temp2.c_str());
+}