test: catch erfa warnings if emitted?

hera_qm/tests/test_vis_metrics.py

@@ -10,13 +10,13 @@
 import copy
 import pytest
 import warnings
+from erfa.core import ErfaWarning
 
 pytestmark = pytest.mark.filterwarnings(
     "ignore:The uvw_array does not match the expected values given the antenna positions.",
 )
 
 @pytest.fixture(scope='function')
-@pytest.mark.filterwarnings("ignore:ERFA function")
 def vismetrics_data():
     data = UVData()
     filename = os.path.join(DATA_PATH, 'zen.2457698.40355.xx.HH.uvcAA')
@@ -26,10 +26,12 @@ def vismetrics_data():
     data.select(antenna_nums=data.get_ants()[0:10])
     data.select(freq_chans=range(100))
     # Data file only has three times... need more.
-    while data.Ntimes < 90:
-        d2 = copy.deepcopy(data)
-        d2.time_array += d2.time_array.max() + d2.integration_time / (24 * 3600)
-        data += d2
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore", category=ErfaWarning)
+        while data.Ntimes < 90:
+            d2 = copy.deepcopy(data)
+            d2.time_array += d2.time_array.max() + d2.integration_time / (24 * 3600)
+            data += d2
     ntimes = data.Ntimes
     nchan = data.Nfreqs
     data1 = qmtest.noise(size=(ntimes, nchan))