Add support for isolated virtualenv in tests.

test/runner/injector/virtualenv-isolated.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Create and activate a fresh virtual environment with `source virtualenv-isolated.sh`.
+
+rm -rf "${OUTPUT_DIR}/venv"
+"${ANSIBLE_TEST_PYTHON_INTERPRETER}" -m virtualenv --python "${ANSIBLE_TEST_PYTHON_INTERPRETER}" "${OUTPUT_DIR}/venv"
+set +ux
+source "${OUTPUT_DIR}/venv/bin/activate"
+set -ux
+
+if [[ "${ANSIBLE_TEST_COVERAGE}" ]]; then
+    pip install coverage -c ../../../runner/requirements/constraints.txt --disable-pip-version-check
+fi

test/runner/lib/executor.py

@@ -1152,6 +1152,7 @@ def integration_environment(args, target, test_dir, inventory_path, ansible_conf
         JUNIT_OUTPUT_DIR=os.path.abspath('test/results/junit'),
         ANSIBLE_CALLBACK_WHITELIST=','.join(sorted(set(callback_plugins))),
         ANSIBLE_TEST_CI=args.metadata.ci_provider,
+        ANSIBLE_TEST_COVERAGE='check' if args.coverage_check else ('yes' if args.coverage else ''),
         OUTPUT_DIR=test_dir,
         INVENTORY_PATH=os.path.abspath(inventory_path),
     )