fix: Add sending queue to ng web server (#2273)

tests/unit/web/ng/ServerTests.cpp

@@ -246,6 +246,7 @@ TEST_F(ServerHttpTest, ClientDisconnects)
         [&]() { ASSERT_FALSE(maybeError.has_value()) << maybeError->message(); }();
 
         client.disconnect();
+        server_->stop(yield);
         ctx_.stop();
     });
 
@@ -304,6 +305,7 @@ TEST_F(ServerHttpTest, OnConnectCheck)
         timer.async_wait(yield[error]);
 
         client.gracefulShutdown();
+        server_->stop(yield);
         ctx_.stop();
     });
 
@@ -362,6 +364,7 @@ TEST_F(ServerHttpTest, OnConnectCheckFailed)
         EXPECT_EQ(response->version(), 11);
 
         client.gracefulShutdown();
+        server_->stop(yield);
         ctx_.stop();
     });
 
@@ -415,6 +418,7 @@ TEST_F(ServerHttpTest, OnDisconnectHook)
         boost::system::error_code error;
         timer.async_wait(yield[error]);
 
+        server_->stop(yield);
         ctx_.stop();
     });
 
@@ -477,6 +481,7 @@ TEST_P(ServerHttpTest, RequestResponse)
         }
 
         client.gracefulShutdown();
+        server_->stop(yield);
         ctx_.stop();
     });
 
@@ -516,6 +521,7 @@ TEST_F(ServerTest, WsClientDisconnects)
         [&]() { ASSERT_FALSE(maybeError.has_value()) << maybeError->message(); }();
 
         client.close();
+        server_->stop(yield);
         ctx_.stop();
     });
 
@@ -546,6 +552,7 @@ TEST_F(ServerTest, WsRequestResponse)
         }
 
         client.gracefulClose(yield, std::chrono::milliseconds{100});
+        server_->stop(yield);
         ctx_.stop();
     });