Add test for #37

Author: basiliscos

t/05-protocol.cpp

@@ -464,3 +464,13 @@ TEST_CASE("serialize + dynamic_string_buffer", "[protocol]") {
     std::string copy(std::begin(buff_backend), std::begin(buff_backend) + buff.size());
     REQUIRE(copy == expected);
 }
+
+TEST_CASE("issue#37, empty command", "[protocol]") {
+    boost::asio::streambuf buff;
+    r::single_command_t cmd("HSET", "key", "value1", "", "value2", "");
+    r::Protocol::serialize(buff, cmd);
+    std::string expected("*6\r\n$4\r\nHSET\r\n$3\r\nkey\r\n$6\r\nvalue1\r\n$0\r\n\r\n$6\r\nvalue2\r\n$0\r\n\r\n");
+    char data[128] = {0};
+    asio::buffer_copy(asio::buffer(data), asio::buffer(buff.data(), buff.size()));
+    REQUIRE(data == expected);
+}