1 files changed, 95 insertions, 1 deletions
diff --git a/libstdc++-v3/testsuite/27_io/ostream_inserter_other.cc b/libstdc++-v3/testsuite/27_io/ostream_inserter_other.cc
index 4ce5b68d207..9d8cc0f9ecc 100644
--- a/libstdc++-v3/testsuite/27_io/ostream_inserter_other.cc
+++ b/libstdc++-v3/testsuite/27_io/ostream_inserter_other.cc
@@ -149,6 +149,99 @@ void test04()
   VERIFY( test );
 }
 
+
+class test_buffer_1 : public std::streambuf 
+{
+public:
+  test_buffer_1(const std::string& s) : str(s), it(str.begin()) { }
+  
+protected:
+  virtual int underflow() { return (it != str.end() ? *it : EOF); }
+  virtual int uflow() { return (it != str.end() ? *it++ : EOF); }
+
+private:
+  const std::string str;
+  std::string::const_iterator it;
+};
+
+
+class test_buffer_2 : public std::streambuf 
+{
+public:
+  test_buffer_2(const std::string& s) : str(s), it(str.begin()) { }
+  
+protected:
+  virtual int underflow() { return (it != str.end() ? *it : EOF); }
+  virtual int uflow() { return (it != str.end() ? *it++ : EOF); }
+  virtual std::streamsize showmanyc() { return std::distance(it, str.end()); }
+private:
+  const std::string str;
+  std::string::const_iterator it;
+};
+
+
+class test_buffer_3 : public std::streambuf 
+{
+public:
+  test_buffer_3(const std::string& s) : str(s), it(str.begin()) { }
+
+protected:
+  virtual int underflow() { return (it != str.end() ? *it : EOF); }
+  virtual int uflow() { return (it != str.end() ? *it++ : EOF); }
+  virtual std::streamsize showmanyc() 
+  {
+    std::streamsize ret = std::distance(it, str.end());
+    return ret > 0 ? ret : -1;
+  }
+private:
+  const std::string str;
+  std::string::const_iterator it;
+};
+
+
+void test(const std::string& str, std::streambuf& buf)
+{
+  bool test = true;
+
+  std::ostringstream out;
+  std::istream in(&buf);
+
+  out << in.rdbuf();
+
+  if (out.str() != str) 
+    VERIFY( false );
+}
+
+// libstdc++/6745
+// libstdc++/8071
+// libstdc++/8127
+// Jonathan Lennox  <lennox@cs.columbia.edu>
+void test05()
+{
+  std::ostringstream out_1, out_2, out_3, out_4;
+
+  std::string string_a("Hello, world!");
+  std::string string_b("");
+
+  test_buffer_1 buf1a(string_a);
+  test_buffer_1 buf1b(string_b);
+
+  test_buffer_2 buf2a(string_a);
+  test_buffer_2 buf2b(string_b);
+
+  test_buffer_3 buf3a(string_a);
+  test_buffer_3 buf3b(string_b);
+
+  test(string_a, buf1a);
+  test(string_b, buf1b);
+
+  test(string_a, buf2a);
+  test(string_b, buf2b);
+
+  test(string_a, buf3a);
+  test(string_b, buf3b);
+}
+
 int 
 main()
 {
@@ -156,6 +249,7 @@ main()
   test02();
   test03();
   test04();
-
+  
+  test05();
   return 0;
 }