Added extra test: check if the stream version of the client request methods works if called first

tests/io_test.cpp

@@ -38,6 +38,7 @@ int main() {
     });
     
     this_thread::sleep_for(chrono::seconds(1));
+    {
         HttpClient client("localhost:8080");
     
         {
@@ -68,6 +69,26 @@ int main() {
             output << r->content.rdbuf();
             assert(output.str()=="123");
         }
+    }
+    {
+        HttpClient client("localhost:8080");
+        
+        // test performing the stream version of the request methods first
+        {
+            stringstream output;
+            stringstream content("A string");
+            auto r=client.request("POST", "/string", content);
+            output << r->content.rdbuf();
+            assert(output.str()=="A string");
+        }
+        
+        {
+            stringstream output;
+            auto r=client.request("POST", "/string", "A string");
+            output << r->content.rdbuf();
+            assert(output.str()=="A string");
+        }
+    }
     
     server.stop();
     server_thread.join();