From 7e3de8c90b68985233e412ad76b878ff3a76a9f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pablo=20Osorio=20L=C3=B3pez?= <osoriopabl@gmail.com>
Date: Thu, 20 Jan 2022 14:47:48 -0500
Subject: [PATCH] TST: Add test inconsistency in group by (#44803)

---
 pandas/tests/groupby/test_groupby.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/pandas/tests/groupby/test_groupby.py b/pandas/tests/groupby/test_groupby.py
index fb2b9f0632f0d..317b8b3090667 100644
--- a/pandas/tests/groupby/test_groupby.py
+++ b/pandas/tests/groupby/test_groupby.py
@@ -32,6 +32,20 @@
 from pandas.core.groupby.base import maybe_normalize_deprecated_kernels
 
 
+def test_group_by_copy():
+    # GH#44803
+    df = DataFrame(
+        {
+            "name": ["Alice", "Bob", "Carl"],
+            "age": [20, 21, 20],
+        }
+    ).set_index("name")
+
+    grp_by_same_value = df.groupby(["age"]).apply(lambda group: group)
+    grp_by_copy = df.groupby(["age"]).apply(lambda group: group.copy())
+    assert grp_by_same_value == grp_by_copy
+
+
 def test_repr():
     # GH18203
     result = repr(Grouper(key="A", level="B"))