tests: avoid segmentation fault

tests/test_rtdc_fmt_http_basin.py

@@ -166,7 +166,8 @@ def test_create_basin_file_non_matching_identifier(tmp_path):
         assert ds.features_basin == ["deform"]
         # ...but it is actually not, since the run identifier does not match
         # and therefore dclab does not allow the user to access it.
-        with pytest.raises(KeyError, match="deform"):
+        with (pytest.warns(UserWarning, match="but I cannot get its data"),
+              pytest.raises(KeyError, match="deform")):
             _ = ds["deform"]
 
 
@@ -241,10 +242,10 @@ def test_trace_availability(tmp_path):
             meta = src.config.as_dict(pop_filtering=True)
             hw.store_metadata(meta)
 
-    ds = dclab.new_dataset(h5path)
-    ds.filter.manual[0] = False
-    ds2 = dclab.new_dataset(ds)
-    assert "trace" in ds2
+    with dclab.new_dataset(h5path) as ds:
+        ds.filter.manual[0] = False
+        with dclab.new_dataset(ds) as ds2:
+            assert "trace" in ds2
 
 
 def test_trace_availability_invalid(tmp_path):
@@ -265,15 +266,18 @@ def test_trace_availability_invalid(tmp_path):
             meta = src.config.as_dict(pop_filtering=True)
             hw.store_metadata(meta)
 
-    ds = dclab.new_dataset(h5path)
-    ds.filter.manual[:] = False
-    ds.filter.manual[:2] = True
-    ds.apply_filter()
-    assert "trace" in ds
-    # Until a workaround is found for invalid basin URLs that return a
-    # status code of 200, do this test which should raise a warning,
-    # because `__contains__` returns True for "trace", but the trace data
-    # are nowhere to find.
-    with (pytest.warns(UserWarning, match="but I cannot get its data"),
-          pytest.raises(KeyError, match="trace")):
-        dclab.new_dataset(ds)
+    with dclab.new_dataset(h5path) as ds:
+        ds.filter.manual[:] = False
+        ds.filter.manual[:2] = True
+        ds.apply_filter()
+        assert "trace" in ds
+        # Until a workaround is found for invalid basin URLs that return a
+        # status code of 200, do this test which should raise a warning,
+        # because `__contains__` returns True for "trace", but the trace data
+        # are nowhere to find.
+        with (pytest.warns(UserWarning, match="but I cannot get its data"),
+              pytest.raises(KeyError, match="trace")):
+            _ = ds["trace"]
+        with (pytest.warns(UserWarning, match="but I cannot get its data"),
+              pytest.raises(KeyError, match="trace")):
+            dclab.new_dataset(ds)

tests/test_rtdc_fmt_s3_basin.py

@@ -135,7 +135,8 @@ def test_create_basin_file_non_matching_identifier(tmp_path):
         assert ds.features_basin == ["deform"]
         # ...but it is actually not, since the run identifier does not match
         # and therefore dclab does not allow the user to access it.
-        with pytest.raises(KeyError, match="deform"):
+        with (pytest.warns(UserWarning, match="but I cannot get its data"),
+              pytest.raises(KeyError, match="deform")):
             _ = ds["deform"]