Add unittest for property inference postinit

Author: areveny

tests/unittest_brain_builtin.py

@@ -0,0 +1,21 @@
+# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
+# For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
+"""Unit Tests for the builtins brain module."""
+
+import unittest
+
+from astroid import extract_node, objects
+
+class BuiltinsTest(unittest.TestCase):
+    def test_infer_property(self):
+        class_with_property = extract_node(
+        """
+        class Something:
+            def getter():
+                return 5
+            asd = property(getter) #@
+        """
+        )
+        inferred_property = list(class_with_property.value.infer())[0]
+        assert isinstance(inferred_property, objects.Property)
+        assert hasattr(inferred_property, "args")