Add end-to-end test

.github/workflows/cpp.yml

@@ -14,8 +14,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
+    - uses: actions/checkout@v4
+    - name: Bootstrap
+      uses: ./.github/actions/bootstrap
 
     - name: Install Dependencies
       run: |
@@ -43,3 +44,22 @@ jobs:
       run: |
         cd build
         cppcheck --enable=all --inline-suppr --suppress=missingIncludeSystem -I../src/cc/flwr/include ../src/cc/flwr/src
+
+    - name: End-to-end test
+      run: |
+        cd examples/quickstart-cpp
+        cmake -S . -B build
+        cmake --build build
+        pip install ../..
+        timeout 2m python server.py &
+        pid=$!
+        sleep 3
+        build/flwr_client 0 127.0.0.1:8080 &
+        sleep 3
+        build/flwr_client 1 127.0.0.1:8080 &
+        wait $pid
+        res=$?
+        if [[ "$res" = "0" ]];
+          then echo "Training worked correctly";
+          else echo "Training had an issue" && exit 1;
+        fi

examples/quickstart-cpp/fedavg_cpp.py

@@ -1,11 +1,8 @@
-from ast import Bytes
-from collections import OrderedDict
-from io import BytesIO
 import struct
-from typing import Callable, Dict, List, Tuple, Union
+from ast import Bytes
+from typing import Callable, Dict, List, Optional, Tuple, Union
 
 import numpy as np
-
 from flwr.server.strategy import FedAvg
 from flwr.common import (
     EvaluateRes,
@@ -14,11 +11,8 @@
     Scalar,
     NDArrays,
 )
-from typing import Optional
-from flwr.server.client_manager import ClientManager
 from flwr.server.client_proxy import ClientProxy
 from flwr.server.strategy.aggregate import aggregate, weighted_loss_avg
-from numpy import bytes_, numarray
 
 
 class FedAvgCpp(FedAvg):