1 files changed, 68 insertions, 0 deletions
diff --git a/lib/portage/tests/emerge/test_actions.py b/lib/portage/tests/emerge/test_actions.py
new file mode 100644
index 000000000..cdc087a8e
--- /dev/null
+++ b/lib/portage/tests/emerge/test_actions.py
@@ -0,0 +1,68 @@
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+from unittest.mock import MagicMock, patch
+
+from _emerge.actions import get_libc_version, run_action
+
+from portage.const import LIBC_PACKAGE_ATOM
+from portage.dbapi.virtual import fakedbapi
+from portage.dep import Atom
+from portage.tests import TestCase
+
+
+class RunActionTestCase(TestCase):
+    """This class' purpose is to encompass UTs for ``actions.run_action``.
+    Since that function is extremely long (at least on Sep. 2022;
+    hopefully the situation gets better with the time), the tests in this
+    ``TestCase`` contain plenty of mocks/patches.
+    Hopefully, with time and effort, the ``run_action`` function (and others
+    in the module) are refactored to make testing easier and more robust.
+
+    A side effect of the mocking approach is a strong dependency on the
+    details of the implementation. That can be improved if functions
+    are smaller and do a well defined small set of tasks. Another call to
+    refactoring...
+    If the implementation changes, the mocks can be adjusted to play its
+    role.
+    """
+
+    @patch("_emerge.actions.profile_check")
+    @patch("_emerge.actions.adjust_configs")
+    @patch("_emerge.actions.apply_priorities")
+    def test_binary_trees_populate_called(self, papply, padjust, profile_ckeck):
+        """Ensure that ``binarytree.populate`` API is correctly used.
+        The point of this test is to ensure that the ``populate`` method
+        is called as expected: since it is the first time that ``populate``
+        is called, it must use ``getbinpkg_refresh=True``.
+        """
+        config = MagicMock()
+        config.action = None
+        config.opts = {"--quiet": True, "--usepkg": True, "--package-moves": "n"}
+        bt = MagicMock()
+        tree = {"bintree": bt}
+        trees = {"first": tree}
+        config.trees = trees
+
+        run_action(config)
+
+        bt.populate.assert_called_once_with(
+            getbinpkgs=False, getbinpkg_refresh=True, pretend=False
+        )
+
+    def testGetSystemLibc(self):
+        """
+        Check that get_libc_version extracts the right version string
+        from the provider LIBC_PACKAGE_ATOM for emerge --info and friends.
+        """
+        settings = MagicMock()
+
+        settings.getvirtuals.return_value = {
+            LIBC_PACKAGE_ATOM: [Atom("=sys-libs/musl-1.2.3")]
+        }
+        settings.__getitem__.return_value = {}
+
+        vardb = fakedbapi(settings)
+        vardb.cpv_inject("sys-libs/musl-1.2.3", {"SLOT": "0"})
+
+        self.assertEqual(get_libc_version(vardb), ["musl-1.2.3"])