configdiff: T5089: add union of configtrees for unit test

1 files changed, 21 insertions, 0 deletions

diff --git a/python/vyos/configtree.py b/python/vyos/configtree.py
index c0b3ebd78..078a8ad0a 100644
--- a/python/vyos/configtree.py
+++ b/python/vyos/configtree.py
@@ -352,6 +352,27 @@ def show_diff(left, right, path=[], commands=False, libpath=LIBPATH):
 
     return res
 
+def union(left, right, libpath=LIBPATH):
+    if left is None:
+        left = ConfigTree(config_string='\n')
+    if right is None:
+        right = ConfigTree(config_string='\n')
+    if not (isinstance(left, ConfigTree) and isinstance(right, ConfigTree)):
+        raise TypeError("Arguments must be instances of ConfigTree")
+
+    __lib = cdll.LoadLibrary(libpath)
+    __tree_union = __lib.tree_union
+    __tree_union.argtypes = [c_void_p, c_void_p]
+    __tree_union.restype = c_void_p
+    __get_error = __lib.get_error
+    __get_error.argtypes = []
+    __get_error.restype = c_char_p
+
+    res = __tree_union( left._get_config(), right._get_config())
+    tree = ConfigTree(address=res)
+
+    return tree
+
 class DiffTree:
     def __init__(self, left, right, path=[], libpath=LIBPATH):
         if left is None: