add multicpu test

Author: fancaiyu

.github/workflows/CI.yml

@@ -37,6 +37,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
+          pip install .
           pip install coverage
           pip install pytest pytest-cov
           pip install -r requirements.txt
@@ -49,7 +50,7 @@ jobs:
           export MASTER_ADDR=localhost
           export MASTER_PORT=12345
           export PYTHONPATH=MCintegration
-          pytest --cov --cov-report=xml
+          pytest --cov --cov-report=xml --ignore=examples
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4