added some tests

test/test_bencoding.cpp

@@ -0,0 +1,74 @@
+#include "libtorrent/bencode.hpp"
+#include <boost/lexical_cast.hpp>
+
+#include "test.hpp"
+
+using namespace libtorrent;
+
+// test vectors from bittorrent protocol description
+// http://www.bittorrent.com/protocol.html
+
+std::string encode(entry const& e)
+{
+	std::string ret;
+	bencode(std::back_inserter(ret), e);
+	return ret;
+}
+
+entry decode(std::string const& str)
+{
+	return bdecode(str.begin(), str.end());
+}
+
+int test_main()
+{
+	using namespace libtorrent;
+
+	// ** strings **
+	{	
+		entry e("spam");
+		TEST_CHECK(encode(e) == "4:spam");
+		TEST_CHECK(decode(encode(e)) == e);
+	}
+
+	// ** integers **
+	{
+		entry e(3);
+		TEST_CHECK(encode(e) == "i3e");
+		TEST_CHECK(decode(encode(e)) == e);
+	}
+
+	{
+		entry e(-3);
+		TEST_CHECK(encode(e) == "i-3e");
+		TEST_CHECK(decode(encode(e)) == e);
+	}
+
+	{
+		entry e(int(0));
+		TEST_CHECK(encode(e) == "i0e");
+		TEST_CHECK(decode(encode(e)) == e);
+	}
+
+	// ** lists **
+	{
+		entry::list_type l;
+		l.push_back(entry("spam"));
+		l.push_back(entry("eggs"));
+		entry e(l);
+		TEST_CHECK(encode(e) == "l4:spam4:eggse");
+		TEST_CHECK(decode(encode(e)) == e);
+	}
+
+	// ** dictionaries **
+	{
+		entry e(entry::dictionary_t);
+		e["cow"] = entry("moo");
+		e["spam"] = entry("eggs");
+		TEST_CHECK(encode(e) == "d3:cow3:moo4:spam4:eggse");
+		TEST_CHECK(decode(encode(e)) == e);
+	}
+	
+	return 0;
+}
+