add system_test.

Author: kafka1991

examples/line_sender_c_example_http.c

@@ -29,9 +29,8 @@ static bool example(const char* host, const char* port)
 
     buffer = line_sender_buffer_new();
     line_sender_buffer_reserve(buffer, 64 * 1024);  // 64KB buffer initial size.
-    line_sender_buffer_set_line_protocol_version(
-        buffer, line_sender_default_line_protocol_version(sender), &err);
-    if (!sender)
+    if (!line_sender_buffer_set_line_protocol_version(
+        buffer, line_sender_default_line_protocol_version(sender), &err))
         goto on_error;
 
     line_sender_table_name table_name = QDB_TABLE_NAME_LITERAL("c_trades_http");

include/questdb/ingress/line_sender.h

@@ -320,7 +320,7 @@ line_sender_buffer* line_sender_buffer_with_max_name_len(size_t max_name_len);
  * be changed after the buffer contains data.
  */
 LINESENDER_API
-line_sender_buffer* line_sender_buffer_set_line_protocol_version(
+bool line_sender_buffer_set_line_protocol_version(
     line_sender_buffer* buffer,
     line_protocol_version version,
     line_sender_error** err_out);

questdb-rs-ffi/src/lib.rs

@@ -233,11 +233,11 @@ impl From<line_sender_protocol> for Protocol {
 pub enum LineProtocolVersion {
     /// Version 1 of Line Protocol.
     /// Uses text format serialization for f64.
-    V1,
+    V1 = 1,
 
     /// Version 2 of InfluxDB Line Protocol.
     /// Uses binary format serialization for f64, and support array data type.
-    V2,
+    V2 = 2,
 }
 
 impl From<LineProtocolVersion> for ingress::LineProtocolVersion {