schema: adds extensions and get_extension for Enum class

This patch allows to get extensions on Enum type

Signed-off-by: Stefan Gula <steweg@gmail.com>

Author: steweg

libyang/schema.py

@@ -491,6 +491,23 @@ def name(self) -> str:
     def description(self) -> str:
         return c2str(self.cdata.dsc)
 
+    def extensions(self) -> Iterator[ExtensionCompiled]:
+        for ext in ly_array_iter(self.cdata.exts):
+            yield ExtensionCompiled(self.context, ext)
+
+    def get_extension(
+        self, name: str, prefix: Optional[str] = None, arg_value: Optional[str] = None
+    ) -> Optional[ExtensionCompiled]:
+        for ext in self.extensions():
+            if ext.name() != name:
+                continue
+            if prefix is not None and ext.module().name() != prefix:
+                continue
+            if arg_value is not None and ext.argument() != arg_value:
+                continue
+            return ext
+        return None
+
     def deprecated(self) -> bool:
         return bool(self.cdata.flags & lib.LYS_STATUS_DEPRC)
 

tests/test_schema.py

@@ -633,6 +633,9 @@ def test_leaf_type_enum(self):
         self.assertEqual(t.base(), Type.ENUM)
         enums = [e.name() for e in t.enums()]
         self.assertEqual(enums, ["http", "https", "ftp", "sftp"])
+        enum = next(t.enums())
+        self.assertIsNone(next(enum.extensions(), None))
+        self.assertIsNone(enum.get_extension("test", prefix="test"))
 
     def test_leaf_type_bits(self):
         leaf = next(self.ctx.find_path("/yolo-system:chmod/yolo-system:perms"))