1 files changed, 94 insertions, 0 deletions
diff --git a/tests/unit/mock/procenv.py b/tests/unit/mock/procenv.py
new file mode 100644
index 00000000..1587949e
--- /dev/null
+++ b/tests/unit/mock/procenv.py
@@ -0,0 +1,94 @@
+# (c) 2016, Matt Davis <mdavis@ansible.com>
+# (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import absolute_import, division, print_function
+
+__metaclass__ = type
+
+import sys
+import json
+
+from contextlib import contextmanager
+from io import BytesIO, StringIO
+from ansible_collections.vyos.vyos.tests.unit.compat import unittest
+from ansible.module_utils.six import PY3
+from ansible.module_utils._text import to_bytes
+
+
+@contextmanager
+def swap_stdin_and_argv(stdin_data="", argv_data=tuple()):
+    """
+    context manager that temporarily masks the test runner's values for stdin and argv
+    """
+    real_stdin = sys.stdin
+    real_argv = sys.argv
+
+    if PY3:
+        fake_stream = StringIO(stdin_data)
+        fake_stream.buffer = BytesIO(to_bytes(stdin_data))
+    else:
+        fake_stream = BytesIO(to_bytes(stdin_data))
+
+    try:
+        sys.stdin = fake_stream
+        sys.argv = argv_data
+
+        yield
+    finally:
+        sys.stdin = real_stdin
+        sys.argv = real_argv
+
+
+@contextmanager
+def swap_stdout():
+    """
+    context manager that temporarily replaces stdout for tests that need to verify output
+    """
+    old_stdout = sys.stdout
+
+    if PY3:
+        fake_stream = StringIO()
+    else:
+        fake_stream = BytesIO()
+
+    try:
+        sys.stdout = fake_stream
+
+        yield fake_stream
+    finally:
+        sys.stdout = old_stdout
+
+
+class ModuleTestCase(unittest.TestCase):
+    def setUp(self, module_args=None):
+        if module_args is None:
+            module_args = {
+                "_ansible_remote_tmp": "/tmp",
+                "_ansible_keep_remote_files": False,
+            }
+
+        args = json.dumps(dict(ANSIBLE_MODULE_ARGS=module_args))
+
+        # unittest doesn't have a clean place to use a context manager, so we have to enter/exit manually
+        self.stdin_swap = swap_stdin_and_argv(stdin_data=args)
+        self.stdin_swap.__enter__()
+
+    def tearDown(self):
+        # unittest doesn't have a clean place to use a context manager, so we have to enter/exit manually
+        self.stdin_swap.__exit__(None, None, None)