--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "common/PrebufferedStreambuf.h"
+#include "gtest/gtest.h"
+
+TEST(PrebufferedStreambuf, Empty)
+{
+ char buf[10];
+ PrebufferedStreambuf sb(buf, sizeof(buf));
+
+ std::istream is(&sb);
+ std::string out;
+ getline(is, out);
+ ASSERT_EQ("", out);
+}
+
+TEST(PrebufferedStreambuf, Simple)
+{
+ char buf[10];
+ PrebufferedStreambuf sb(buf, sizeof(buf));
+
+ std::ostream os(&sb);
+ os << "test";
+
+ std::istream is(&sb);
+ std::string out;
+ getline(is, out);
+ ASSERT_EQ("test", out);
+}
+
+TEST(PrebufferedStreambuf, Multiline)
+{
+ char buf[10];
+ PrebufferedStreambuf sb(buf, sizeof(buf));
+
+ std::ostream os(&sb);
+ const char *s = "this is a line\nanother line\nand a third\nwhee!\n";
+ os << s;
+
+ std::istream is(&sb);
+ std::string out;
+ getline(is, out, is.widen(0));
+ ASSERT_EQ(s, out);
+}
+
+TEST(PrebufferedStreambuf, Withnull)
+{
+ char buf[10];
+ PrebufferedStreambuf sb(buf, sizeof(buf));
+
+ std::ostream os(&sb);
+ std::string s("null \0 and more", 15);
+ os << s;
+
+ std::istream is(&sb);
+ std::string out;
+ getline(is, out);
+ ASSERT_EQ(s, out);
+}
+
+TEST(PrebufferedStreambuf, SimpleOverflow)
+{
+ char buf[10];
+ PrebufferedStreambuf sb(buf, sizeof(buf));
+
+ std::ostream os(&sb);
+ const char *s = "hello, this is longer than buf[10]";
+ os << s;
+
+ ASSERT_EQ(s, sb.get_str());
+
+ std::istream is(&sb);
+ std::string out;
+ getline(is, out);
+ ASSERT_EQ(s, out);
+}
+
+TEST(PrebufferedStreambuf, ManyOverflow)
+{
+ char buf[10];
+ PrebufferedStreambuf sb(buf, sizeof(buf));
+
+ std::ostream os(&sb);
+ const char *s = "hello, this way way way way way way way way way way way way way way way way way way way way way way way way way _way_ longer than buf[10]";
+ os << s;
+
+ ASSERT_EQ(s, sb.get_str());
+
+ std::istream is(&sb);
+ std::string out;
+ getline(is, out);
+ ASSERT_EQ(s, out);
+}
+