Add check for the number of tests run

.github/workflows/shared-build-and-test.yaml

@@ -38,8 +38,25 @@ jobs:
 
       - name: Build and run unit tests
         if: ${{ inputs.vulnerability_scan_only == 'false' }}
-        run: mvn -B clean compile test
         working-directory: ${{ inputs.working_dir }}
+        run: |
+          mvn -B clean compile test | tee build.log
+
+          tests_run=$(cat build.log  | grep "Tests run:" | tail -n 1 | sed 's/.*Tests run: \([0-9]*\).*/\1/')
+
+          echo "DEBUG: tests_run = $tests_run"
+
+          if [ -z "$tests_run" ]; then
+            echo "WARNING: Could not determine the number of tests run."
+            tests_run=0
+          fi
+
+          if [ "$tests_run" -eq 0 ]; then
+            echo "ERROR: No tests were run!"
+            exit 1
+          fi
+
+          echo "INFO: $tests_run tests were run!"
 
       - name: Generate code coverage
         if: ${{ inputs.vulnerability_scan_only == 'false' }}