T7499: add unittest for config tree merge function

1 files changed, 50 insertions, 0 deletions

diff --git a/src/tests/test_config_merge.py b/src/tests/test_config_merge.py
new file mode 100644
index 000000000..c9b4ad5c8
--- /dev/null
+++ b/src/tests/test_config_merge.py
@@ -0,0 +1,50 @@
+# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import vyos.configtree
+
+from unittest import TestCase
+
+class TestConfigDiff(TestCase):
+    def setUp(self):
+        with open('tests/data/config.left', 'r') as f:
+            config_string = f.read()
+            self.config_left = vyos.configtree.ConfigTree(config_string)
+
+        with open('tests/data/config.right', 'r') as f:
+            config_string = f.read()
+            self.config_right = vyos.configtree.ConfigTree(config_string)
+
+    def test_merge_destructive(self):
+        res = vyos.configtree.merge(self.config_left, self.config_right,
+                                    destructive=True)
+        right_value = self.config_right.return_value(['node1', 'tag_node', 'foo', 'single'])
+        merge_value = res.return_value(['node1', 'tag_node', 'foo', 'single'])
+
+        # Check includes new value
+        self.assertEqual(right_value, merge_value)
+
+        # Check preserves non-confliciting paths
+        self.assertTrue(res.exists(['node3']))
+
+    def test_merge_non_destructive(self):
+        res = vyos.configtree.merge(self.config_left, self.config_right)
+        left_value = self.config_left.return_value(['node1', 'tag_node', 'foo', 'single'])
+        merge_value = res.return_value(['node1', 'tag_node', 'foo', 'single'])
+
+        # Check includes original value
+        self.assertEqual(left_value, merge_value)
+
+        # Check preserves non-confliciting paths
+        self.assertTrue(res.exists(['node3']))