1 files changed, 58 insertions, 0 deletions
diff --git a/libcxx/test/std/input.output/iostream.format/output.streams/ostream.manip/flush.pass.cpp b/libcxx/test/std/input.output/iostream.format/output.streams/ostream.manip/flush.pass.cpp
new file mode 100644
index 00000000000..088826c3d5a
--- /dev/null
+++ b/libcxx/test/std/input.output/iostream.format/output.streams/ostream.manip/flush.pass.cpp
@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <ostream>
+
+// template <class charT, class traits = char_traits<charT> >
+//   class basic_ostream;
+
+// template <class charT, class traits>
+//   basic_ostream<charT,traits>& flush(basic_ostream<charT,traits>& os);
+
+#include <ostream>
+#include <cassert>
+
+int sync_called = 0;
+
+template <class CharT>
+class testbuf
+    : public std::basic_streambuf<CharT>
+{
+public:
+    testbuf()
+    {
+    }
+
+protected:
+
+    virtual int
+        sync()
+        {
+            ++sync_called;
+            return 0;
+        }
+};
+
+int main()
+{
+    {
+        testbuf<char> sb;
+        std::ostream os(&sb);
+        flush(os);
+        assert(sync_called == 1);
+        assert(os.good());
+    }
+    {
+        testbuf<wchar_t> sb;
+        std::wostream os(&sb);
+        flush(os);
+        assert(sync_called == 2);
+        assert(os.good());
+    }
+}