add mock package for testing

Author: rouilj

.github/workflows/ci-test.yml

@@ -15,6 +15,10 @@ on:
         # monthly build/check
         - cron: '23 17 1 * *'
 
+# GITHUB_TOKEN only has read repo context.
+permissions:
+  contents: read
+
 jobs:
   test:
     name: CI build test
@@ -158,7 +162,7 @@ jobs:
           case "$PYTHON_VERSION" in nightly) echo skipping xapian build;; *) make && sudo make install; esac
 
       - name: Install pytest and other packages needed for running tests
-        run: pip install codecov flake8 pytest pytest-cov requests
+        run: pip install codecov flake8 mock pytest pytest-cov requests
 
       - name: Test build roundup and install locale so lang tests work.
         run: |