From d409eaf22f0aa1cf4088ebbbe0b1ab8b3917973b Mon Sep 17 00:00:00 2001
From: gfyoung <gfyoung17@gmail.com>
Date: Mon, 22 Jan 2018 15:59:55 -0800
Subject: [PATCH] MAINT: Remove pytest.warns in tests (#19341)

* MAINT: Check for pytest.warns in tests

Per discussion in gh-18258, we are
prohibiting its use in tests, at
least for the time being.

* MAINT: Patch lint error with pytest.warns

The lint correctly fails on this line.
---
 ci/lint.sh                             | 8 ++++++++
 pandas/tests/series/test_timeseries.py | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/ci/lint.sh b/ci/lint.sh
index a96e0961304e7..98b33c0803d90 100755
--- a/ci/lint.sh
+++ b/ci/lint.sh
@@ -89,6 +89,14 @@ if [ "$LINT" ]; then
     if [ $? = "0" ]; then
         RET=1
     fi
+
+    # Check for pytest.warns
+    grep -r -E --include '*.py' 'pytest\.warns' pandas/tests/
+
+    if [ $? = "0" ]; then
+        RET=1
+    fi
+
     echo "Check for invalid testing DONE"
 
     # Check for imports from pandas.core.common instead
diff --git a/pandas/tests/series/test_timeseries.py b/pandas/tests/series/test_timeseries.py
index b9c95c372ab9e..7be801629e387 100644
--- a/pandas/tests/series/test_timeseries.py
+++ b/pandas/tests/series/test_timeseries.py
@@ -937,7 +937,7 @@ def test_from_M8_structured(self):
         assert isinstance(s[0], Timestamp)
         assert s[0] == dates[0][0]
 
-        with pytest.warns(FutureWarning):
+        with tm.assert_produces_warning(FutureWarning, check_stacklevel=False):
             s = Series.from_array(arr['Date'], Index([0]))
             assert s[0] == dates[0][0]