Payload data type addded

include/jwt/test/test_jwt_payload.cc

@@ -0,0 +1,34 @@
+#include <iostream>
+#include "jwt/jwt.hpp"
+
+void basic_payload_test()
+{
+  jwt::jwt_payload jp;
+  jp.add_claim("iss", "myself");
+  jp.add_claim("exp", 1234567);
+  jp.add_claim("Exp", 1234567, true);
+
+  auto jstr = jwt::to_json_str(jp);
+  std::cout << jstr << std::endl;
+
+  auto enc = jp.base64_encode();
+  std::cout << "Base64 enc: " << enc << std::endl;
+
+  auto dec = jp.base64_decode(enc);
+  std::cout << "Base64 dec: " << dec << std::endl;
+  std::cout << "Base64 dec: " << jstr << std::endl;
+
+  assert (jstr == dec && "Encoded and decoded messages do not match");
+  assert (jp.has_claim("exp") && "Claim exp must exist");
+  assert (jp.has_claim("Exp") && "Claim Exp must exist");
+
+  assert (!jp.has_claim("aud") && "Claim aud does not exist");
+  assert (jp.has_claim_with_value("exp", 1234567) && "Claim exp with value 1234567 does not exist");
+
+  return;
+}
+
+int main() {
+  basic_payload_test();
+  return 0;
+}