TST: test against pytest pre-releases

.github/workflows/bleeding-edge.yaml

@@ -42,7 +42,7 @@ jobs:
 
     - name: Build amical
       run: |
-        python -m pip install --requirement requirements/tests.txt
+        python -m pip install --requirement requirements/tests.txt --pre
         python -m pip install --no-build-isolation .
 
     - name: Run tests

amical/tests/test_processing.py

@@ -100,16 +100,21 @@ def test_sky_correction_mask_all():
 
 
 def test_sky_correction_mask_zeros():
-    # Check that empty correction mask gives warning and does nothing
+    # Check that empty correction mask gives warnings and does nothing
     img_dim = 80
     img = np.random.random((img_dim, img_dim))
     mask = np.zeros_like(img, dtype=bool)
 
-    with pytest.warns(
-        RuntimeWarning,
-        match="Background not computed because mask has no True values",
-    ):
+    with pytest.warns(RuntimeWarning) as record:
         img_corr = sky_correction(img, mask=mask)[0]
+    assert len(record) == 2
+    assert (
+        record[0].message.args[0]
+        == "Background not computed because mask has no True values"
+    )
+    assert record[1].message.args[0] == (
+        "Background not computed, likely because specified radius is out of bounds"
+    )
 
     assert np.all(img_corr == img)
 
@@ -173,12 +178,21 @@ def test_clean_data_none_kwargs():
     data = np.random.random((n_im, img_dim, img_dim))
 
     # sky=True raises a warning by default because required kwargs are None
-    with pytest.warns(
-        RuntimeWarning,
-        match="sky is set to True, but r1 and mask are set to None. Skipping sky correction",
-    ):
+    with pytest.warns(RuntimeWarning) as record:
         cube_clean_sky = clean_data(data)
 
+    # we might record many more than 2 warnings, but we filter duplicates
+    # to replicate Python's default behaviour: warnings only pop once per call site
+    unique_messages = {_.message.args[0] for _ in record}
+    assert len(unique_messages) == 2, "\n".join(unique_messages)
+    assert unique_messages == {
+        (
+            "sky is set to True, but r1 and mask are set to None. "
+            "Skipping sky correction"
+        ),
+        "apod is set to True, but window is None. Skipping apodisation",
+    }
+
     # apod=True raises a warning by default because required kwargs are None
     with pytest.warns(
         RuntimeWarning,