Relocate ansible-test code. (#60147)

* Initial move of `test/runner/` content.

`test/runner/lib/` -> `test/lib/ansible_test/_internal/`
`test/runner/`     -> `test/lib/ansible_test/_internal/data/`

* Initial move of `test/sanity/` content.

`test/sanity/` -> `test/lib/ansible_test/_internal/data/sanity/` (except `test/sanity/ignore.txt`)

* Initial move of `test/units/pytest/` content.

`test/units/pytest/` -> `test/lib/ansible_test/_internal/data/pytest/`

* Follow-up move of `test/runner/unit/` content.

`test/lib/ansible_test/_internal/data/unit/` -> `test/lib/ansible_test/tests/unit/`

* Initial move of `ansible.cfg` content.

`test/units/ansible.cfg` -> `test/lib/ansible_test/_internal/data/units/ansible.cfg`
`test/env/ansible.cfg` -> `test/lib/ansible_test/_internal/data/env/ansible.cfg`

* Follow-up move of `data` directory.

`test/lib/ansible_test/_internal/data/` -> `test/lib/ansible_test/_data/`

* Update import statements.

* Add missing __init__.py for unit tests.

* Fix path references and miscellaneous issues.

2 files changed, 93 insertions, 0 deletions

diff --git a/test/lib/ansible_test/_data/pytest/plugins/ansible_pytest_collections.py b/test/lib/ansible_test/_data/pytest/plugins/ansible_pytest_collections.py
new file mode 100644
index 0000000000..ae87187b83
--- /dev/null
+++ b/test/lib/ansible_test/_data/pytest/plugins/ansible_pytest_collections.py
@@ -0,0 +1,34 @@
+"""Enable unit testing of Ansible collections."""
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import sys
+
+# set by ansible-test to a single directory, rather than a list of directories as supported by Ansible itself
+ANSIBLE_COLLECTIONS_PATH = os.path.join(os.environ['ANSIBLE_COLLECTIONS_PATHS'], 'ansible_collections')
+
+
+def collection_pypkgpath(self):
+    """Configure the Python package path so that pytest can find our collections."""
+    for parent in self.parts(reverse=True):
+        if str(parent) == ANSIBLE_COLLECTIONS_PATH:
+            return parent
+
+    raise Exception('File "%s" not found in collection path "%s".' % (self.strpath, ANSIBLE_COLLECTIONS_PATH))
+
+
+def pytest_configure():
+    """Configure this pytest plugin."""
+    from ansible.utils.collection_loader import AnsibleCollectionLoader
+
+    # allow unit tests to import code from collections
+    sys.meta_path.insert(0, AnsibleCollectionLoader())
+
+    # noinspection PyProtectedMember
+    import py._path.local
+
+    # force collections unit tests to be loaded with the ansible_collections namespace
+    # original idea from https://stackoverflow.com/questions/50174130/how-do-i-pytest-a-project-using-pep-420-namespace-packages/50175552#50175552
+    # noinspection PyProtectedMember
+    py._path.local.LocalPath.pypkgpath = collection_pypkgpath  # pylint: disable=protected-access
diff --git a/test/lib/ansible_test/_data/pytest/plugins/ansible_pytest_coverage.py b/test/lib/ansible_test/_data/pytest/plugins/ansible_pytest_coverage.py
new file mode 100644
index 0000000000..344a091e1c
--- /dev/null
+++ b/test/lib/ansible_test/_data/pytest/plugins/ansible_pytest_coverage.py
@@ -0,0 +1,59 @@
+"""Monkey patch os._exit when running under coverage so we don't lose coverage data in forks, such as with `pytest --boxed`."""
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+
+def pytest_configure():
+    """Configure this pytest plugin."""
+    try:
+        import coverage
+    except ImportError:
+        coverage = None
+
+    try:
+        coverage.Coverage
+    except AttributeError:
+        coverage = None
+
+    if not coverage:
+        return
+
+    import gc
+    import os
+
+    coverage_instances = []
+
+    for obj in gc.get_objects():
+        if isinstance(obj, coverage.Coverage):
+            coverage_instances.append(obj)
+
+    if not coverage_instances:
+        coverage_config = os.environ.get('COVERAGE_CONF')
+
+        if not coverage_config:
+            return
+
+        coverage_output = os.environ.get('COVERAGE_FILE')
+
+        if not coverage_output:
+            return
+
+        cov = coverage.Coverage(config_file=coverage_config)
+        coverage_instances.append(cov)
+    else:
+        cov = None
+
+    # noinspection PyProtectedMember
+    os_exit = os._exit  # pylint: disable=protected-access
+
+    def coverage_exit(*args, **kwargs):
+        for instance in coverage_instances:
+            instance.stop()
+            instance.save()
+
+        os_exit(*args, **kwargs)
+
+    os._exit = coverage_exit  # pylint: disable=protected-access
+
+    if cov:
+        cov.start()