1 files changed, 34 insertions, 0 deletions

diff --git a/libcxx/test/strings/basic.string/string.access/back.pass.cpp b/libcxx/test/strings/basic.string/string.access/back.pass.cpp
new file mode 100644
index 00000000000..a4ce3ac26f4
--- /dev/null
+++ b/libcxx/test/strings/basic.string/string.access/back.pass.cpp
@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+// ΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// const charT& back() const;
+//       charT& back();
+
+#include <string>
+#include <cassert>
+
+template <class S>
+void
+test(S s)
+{
+    const S& cs = s;
+    assert(&cs.back() == &cs[cs.size()-1]);
+    assert(&s.back() == &s[cs.size()-1]);
+    s.back() = typename S::value_type('z');
+    assert(s.back() == typename S::value_type('z'));
+}
+
+int main()
+{
+    typedef std::string S;
+    test(S("1"));
+    test(S("1234567890123456789012345678901234567890"));
+}