1 files changed, 41 insertions, 0 deletions
diff --git a/test/std/input.output/stream.buffers/streambuf/streambuf.members/streambuf.pub.get/sgetn.pass.cpp b/test/std/input.output/stream.buffers/streambuf/streambuf.members/streambuf.pub.get/sgetn.pass.cpp
new file mode 100644
index 0000000000000..730cedeea76c0
--- /dev/null
+++ b/test/std/input.output/stream.buffers/streambuf/streambuf.members/streambuf.pub.get/sgetn.pass.cpp
@@ -0,0 +1,41 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <streambuf>
+
+// template <class charT, class traits = char_traits<charT> >
+// class basic_streambuf;
+
+// streamsize sgetn(char_type* s, streamsize n);
+
+#include <streambuf>
+#include <cassert>
+
+int xsgetn_called = 0;
+
+struct test
+    : public std::basic_streambuf<char>
+{
+    test() {}
+
+protected:
+    std::streamsize xsgetn(char_type* s, std::streamsize n)
+    {
+        ++xsgetn_called;
+        return 10;
+    }
+};
+
+int main()
+{
+    test t;
+    assert(xsgetn_called == 0);
+    assert(t.sgetn(0, 0) == 10);
+    assert(xsgetn_called == 1);
+}