From 906471e23e597b7326db17cab3bc826bad598059 Mon Sep 17 00:00:00 2001
From: omar-elbaz <114315316+omar-elbaz@users.noreply.github.com>
Date: Fri, 11 Aug 2023 12:19:00 -0400
Subject: [PATCH] Unit test for groupby.rolling.corr (#54499)

---
 pandas/tests/groupby/test_groupby.py | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/pandas/tests/groupby/test_groupby.py b/pandas/tests/groupby/test_groupby.py
index 9b260d5757767..24a550b4602a6 100644
--- a/pandas/tests/groupby/test_groupby.py
+++ b/pandas/tests/groupby/test_groupby.py
@@ -3159,3 +3159,29 @@ def test_groupby_series_with_datetimeindex_month_name():
     expected = Series([2, 1], name="jan")
     expected.index.name = "jan"
     tm.assert_series_equal(result, expected)
+
+
+def test_rolling_corr_grouping_column_contains_tuples_1(df):
+    # GH 44078
+    df = DataFrame({"a": [(1,), (1,), (1,)], "b": [4, 5, 6]})
+    gb = df.groupby(["a"])
+    result = gb.rolling(2).corr(other=df)
+    index = MultiIndex.from_tuples([((1,), 0), ((1,), 1), ((1,), 2)], names=["a", None])
+    expected = DataFrame(
+        {"a": [np.nan, np.nan, np.nan], "b": [np.nan, 1.0, 1.0]}, index=index
+    )
+    tm.assert_frame_equal(result, expected)
+
+
+def test_rolling_corr_case_grrouping_column_contains_tuples_2(df):
+    # GH 44078
+    df = DataFrame({"a": [(1, 2), (1, 2), (1, 2)], "b": [4, 5, 6]})
+    gb = df.groupby(["a"])
+    result = gb.rolling(2).corr(other=df)
+    index = MultiIndex.from_tuples(
+        [((1, 2), 0), ((1, 2), 1), ((1, 2), 2)], names=["a", None]
+    )
+    expected = DataFrame(
+        {"a": [np.nan, np.nan, np.nan], "b": [np.nan, 1.0, 1.0]}, index=index
+    )
+    tm.assert_frame_equal(result, expected)