1 files changed, 65 insertions, 0 deletions
diff --git a/test/units/_vendor/test_vendor.py b/test/units/_vendor/test_vendor.py
new file mode 100644
index 0000000..84b850e
--- /dev/null
+++ b/test/units/_vendor/test_vendor.py
@@ -0,0 +1,65 @@
+# (c) 2020 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import pkgutil
+import pytest
+import sys
+
+from unittest.mock import MagicMock, NonCallableMagicMock, patch
+
+
+def reset_internal_vendor_package():
+    import ansible
+    ansible_vendor_path = os.path.join(os.path.dirname(ansible.__file__), '_vendor')
+
+    if ansible_vendor_path in sys.path:
+        sys.path.remove(ansible_vendor_path)
+
+    for pkg in ['ansible._vendor', 'ansible']:
+        if pkg in sys.modules:
+            del sys.modules[pkg]
+
+
+def test_package_path_masking():
+    from ansible import _vendor
+
+    assert hasattr(_vendor, '__path__') and _vendor.__path__ == []
+
+
+def test_no_vendored():
+    reset_internal_vendor_package()
+    with patch.object(pkgutil, 'iter_modules', return_value=[]):
+        previous_path = list(sys.path)
+        import ansible
+        ansible_vendor_path = os.path.join(os.path.dirname(ansible.__file__), '_vendor')
+
+        assert ansible_vendor_path not in sys.path
+        assert sys.path == previous_path
+
+
+def test_vendored(vendored_pkg_names=None):
+    if not vendored_pkg_names:
+        vendored_pkg_names = ['boguspkg']
+    reset_internal_vendor_package()
+    with patch.object(pkgutil, 'iter_modules', return_value=list((None, p, None) for p in vendored_pkg_names)):
+        previous_path = list(sys.path)
+        import ansible
+        ansible_vendor_path = os.path.join(os.path.dirname(ansible.__file__), '_vendor')
+        assert sys.path[0] == ansible_vendor_path
+
+        if ansible_vendor_path in previous_path:
+            previous_path.remove(ansible_vendor_path)
+
+        assert sys.path[1:] == previous_path
+
+
+def test_vendored_conflict():
+    with pytest.warns(UserWarning) as w:
+        import pkgutil
+        import sys
+        test_vendored(vendored_pkg_names=['sys', 'pkgutil'])  # pass a real package we know is already loaded
+        assert any('pkgutil, sys' in str(msg.message) for msg in w)  # ensure both conflicting modules are listed and sorted