TST: Raise on pytest.PytestWarning (#61996)

Author: mroeschke

.github/workflows/unit-tests.yml

@@ -71,7 +71,7 @@ jobs:
  # It will be temporarily activated during tests with locale.setlocale
  extra_loc: "zh_CN"
  platform: ubuntu-24.04
- - name: "Past no infer strings"
+ - name: "PANDAS_FUTURE_INFER_STRING=0"
  env_file: actions-312.yaml
  pandas_future_infer_string: "0"
  platform: ubuntu-24.04

pandas/tests/arrays/test_datetimes.py

@@ -100,7 +100,7 @@ def test_simple_new_requires_match(self, unit):
  assert dta.dtype == dtype
 
  wrong = DatetimeTZDtype("ns", "UTC")
- with pytest.raises(AssertionError, match=""):
+ with pytest.raises(AssertionError, match="^$"):
  DatetimeArray._simple_new(arr, dtype=wrong)
 
  def test_std_non_nano(self, unit):

pandas/tests/dtypes/test_dtypes.py

@@ -249,10 +249,14 @@ def test_alias_to_unit_raises(self):
 
  def test_alias_to_unit_bad_alias_raises(self):
  # 23990
- with pytest.raises(TypeError, match=""):
+ with pytest.raises(
+ TypeError, match="Cannot construct a 'DatetimeTZDtype' from"
+ ):
  DatetimeTZDtype("this is a bad string")
 
- with pytest.raises(TypeError, match=""):
+ with pytest.raises(
+ TypeError, match="Cannot construct a 'DatetimeTZDtype' from"
+ ):
  DatetimeTZDtype("datetime64[ns, US/NotATZ]")
 
  def test_hash_vs_equality(self, dtype):

pandas/tests/frame/test_ufunc.py

@@ -191,7 +191,7 @@ def test_unary_accumulate_axis():
 
 def test_frame_outer_disallowed():
  df = pd.DataFrame({"A": [1, 2]})
- with pytest.raises(NotImplementedError, match=""):
+ with pytest.raises(NotImplementedError, match="^$"):
  # deprecation enforced in 2.0
  np.subtract.outer(df, df)
 

pandas/tests/indexes/numeric/test_indexing.py

@@ -585,10 +585,10 @@ def test_slice_locs_na(self):
 
  def test_slice_locs_na_raises(self):
  index = Index([np.nan, 1, 2])
- with pytest.raises(KeyError, match=""):
+ with pytest.raises(KeyError, match="1.5"):
  index.slice_locs(start=1.5)
 
- with pytest.raises(KeyError, match=""):
+ with pytest.raises(KeyError, match="1.5"):
  index.slice_locs(end=1.5)
 
 

pandas/tests/indexes/test_base.py

@@ -712,7 +712,7 @@ def test_drop_by_str_label(self, index):
  )
  @pytest.mark.parametrize("keys", [["foo", "bar"], ["1", "bar"]])
  def test_drop_by_str_label_raises_missing_keys(self, index, keys):
- with pytest.raises(KeyError, match=""):
+ with pytest.raises(KeyError, match=".* not found in axis"):
  index.drop(keys)
 
  @pytest.mark.parametrize(
@@ -741,7 +741,7 @@ def test_drop_by_numeric_label_loc(self):
 
  def test_drop_by_numeric_label_raises_missing_keys(self):
  index = Index([1, 2, 3])
- with pytest.raises(KeyError, match=""):
+ with pytest.raises(KeyError, match=re.escape("[4] not found in axis")):
  index.drop([3, 4])
 
  @pytest.mark.parametrize(

pandas/tests/indexing/multiindex/test_getitem.py

@@ -89,8 +89,12 @@ def test_series_getitem_returns_scalar(
  (lambda s: s[(2000, 3, 4)], KeyError, r"^\(2000, 3, 4\)$"),
  (lambda s: s.loc[(2000, 3, 4)], KeyError, r"^\(2000, 3, 4\)$"),
  (lambda s: s.loc[(2000, 3, 4, 5)], IndexingError, "Too many indexers"),
- (lambda s: s.__getitem__(len(s)), KeyError, ""), # match should include len(s)
- (lambda s: s[len(s)], KeyError, ""), # match should include len(s)
+ (
+ lambda s: s.__getitem__(len(s)),
+ KeyError,
+ "100",
+ ), # match should include len(s)
+ (lambda s: s[len(s)], KeyError, "100"), # match should include len(s)
  (
  lambda s: s.iloc[len(s)],
  IndexError,

pandas/tests/io/json/test_normalize.py

@@ -172,7 +172,7 @@ def test_empty_array(self):
  )
  def test_accepted_input(self, data, record_path, exception_type):
  if exception_type is not None:
- with pytest.raises(exception_type, match=""):
+ with pytest.raises(exception_type, match="^$"):
  json_normalize(data, record_path=record_path)
  else:
  result = json_normalize(data, record_path=record_path)

pandas/tests/io/parser/common/test_chunksize.py

@@ -129,7 +129,7 @@ def test_read_chunksize_and_nrows_changing_size(all_parsers):
  tm.assert_frame_equal(reader.get_chunk(size=2), expected.iloc[:2])
  tm.assert_frame_equal(reader.get_chunk(size=4), expected.iloc[2:5])
 
- with pytest.raises(StopIteration, match=""):
+ with pytest.raises(StopIteration, match="^$"):
  reader.get_chunk(size=3)
 
 

pandas/tests/io/test_sql.py

@@ -2226,7 +2226,7 @@ def test_api_chunksize_read(conn, request):
 
  # reading the query in chunks with read_sql_query
  if conn_name == "sqlite_buildin":
- with pytest.raises(NotImplementedError, match=""):
+ with pytest.raises(NotImplementedError, match="^$"):
  sql.read_sql_table("test_chunksize", conn, chunksize=5)
  else:
  res3 = DataFrame()