1 files changed, 79 insertions, 0 deletions
diff --git a/test/std/input.output/iostream.format/input.streams/istream.manip/ws.pass.cpp b/test/std/input.output/iostream.format/input.streams/istream.manip/ws.pass.cpp
new file mode 100644
index 0000000000000..3c8159a6d7cb2
--- /dev/null
+++ b/test/std/input.output/iostream.format/input.streams/istream.manip/ws.pass.cpp
@@ -0,0 +1,79 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <istream>
+
+// template <class charT, class traits>
+//   basic_istream<charT,traits>&
+//   ws(basic_istream<charT,traits>& is);
+
+#include <istream>
+#include <cassert>
+
+template <class CharT>
+struct testbuf
+    : public std::basic_streambuf<CharT>
+{
+    typedef std::basic_string<CharT> string_type;
+    typedef std::basic_streambuf<CharT> base;
+private:
+    string_type str_;
+public:
+
+    testbuf() {}
+    testbuf(const string_type& str)
+        : str_(str)
+    {
+        base::setg(const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()) + str_.size());
+    }
+
+    CharT* eback() const {return base::eback();}
+    CharT* gptr() const {return base::gptr();}
+    CharT* egptr() const {return base::egptr();}
+};
+
+int main()
+{
+    {
+        testbuf<char> sb("   123");
+        std::istream is(&sb);
+        ws(is);
+        assert(is.good());
+        assert(is.peek() == '1');
+    }
+    {
+        testbuf<wchar_t> sb(L"   123");
+        std::wistream is(&sb);
+        ws(is);
+        assert(is.good());
+        assert(is.peek() == L'1');
+    }
+    {
+        testbuf<char> sb("  ");
+        std::istream is(&sb);
+        ws(is);
+        assert(!is.fail());
+        assert(is.eof());
+        ws(is);
+        assert(is.eof());
+        assert(is.fail());
+    }
+    {
+        testbuf<wchar_t> sb(L"  ");
+        std::wistream is(&sb);
+        ws(is);
+        assert(!is.fail());
+        assert(is.eof());
+        ws(is);
+        assert(is.eof());
+        assert(is.fail());
+    }
+}