feat: add one client upload twice example

tests/test_cinatra.cpp

@@ -950,7 +950,7 @@ TEST_CASE("test server body limit upload request body") {
   //  server.enable_timeout(false);
 
   auto control_func = [](request &req, response &res) -> bool {
-    int max_body_size = 2048;  // 1k
+    int max_body_size = 2048;  // 2k
     if (max_body_size < req.body_len()) {
       return false;
     }
@@ -989,17 +989,30 @@ TEST_CASE("test server body limit upload request body") {
   coro_http_client client{};
   std::string uri = "http://127.0.0.1:8090/multipart";
 
-  client.set_max_single_part_size(2048);
+  client.set_max_single_part_size(1024);
+
   std::string test_file_name = "test1.txt";
   std::ofstream test_file;
   test_file.open(test_file_name,
                  std::ios::binary | std::ios::out | std::ios::trunc);
-  std::vector<char> test_file_data(10 * 1024 * 1024, '0');
+  std::vector<char> test_file_data(1 * 1024, '0');
   test_file.write(test_file_data.data(), test_file_data.size());
   test_file.close();
   auto result = async_simple::coro::syncAwait(
       client.async_upload_multipart(uri, "test", test_file_name));
 
+  CHECK(result.status == 200);
+  client.set_max_single_part_size(2048);
+  std::string test_big_file_name = "test_2mb.txt";
+  std::ofstream test_big_file;
+  test_big_file.open(test_big_file_name,
+                     std::ios::binary | std::ios::out | std::ios::trunc);
+  std::vector<char> test_big_file_data(3 * 1024 * 1024, '0');
+  test_big_file.write(test_big_file_data.data(), test_big_file_data.size());
+  test_big_file.close();
+  result = async_simple::coro::syncAwait(
+      client.async_upload_multipart(uri, "test_big", test_big_file_name));
+
   CHECK(result.status == 404);
 
   coro_http_client sec_client{};
@@ -1012,7 +1025,7 @@ TEST_CASE("test server body limit upload request body") {
   small_file.write(small_file_data.data(), small_file_data.size());
   small_file.close();
   result = async_simple::coro::syncAwait(
-      sec_client.async_upload_multipart(uri, "test", small_file_name));
+      sec_client.async_upload_multipart(uri, "test_small", small_file_name));
   CHECK(result.status == 200);
   CHECK(result.resp_body == "multipart finished");