fix test & make a more informative error

Author: keflavich

astroquery/simbad/core.py

@@ -645,6 +645,10 @@ def query_region_async(self, coordinates, radius=2*u.arcmin, *,
              Response of the query from the server.
         """
 
+        if radius is None:
+            # this message is specifically for deprecated use of 'None' to mean 'Default'
+            raise ValueError("Radius must be specified as an angle-equivalent quantity, not None")
+
         equinox = validate_equinox(equinox)
         epoch = validate_epoch(epoch)
 

astroquery/simbad/tests/test_simbad.py

@@ -234,10 +234,10 @@ def test_query_catalog(patch_post):
 
 
 @pytest.mark.parametrize(('coordinates', 'radius', 'equinox', 'epoch'),
-                         [(ICRS_COORDS, None, 2000.0, 'J2000'),
+                         [(ICRS_COORDS, 2*u.arcmin, 2000.0, 'J2000'),
                           (GALACTIC_COORDS, 5 * u.deg, 2000.0, 'J2000'),
                           (FK4_COORDS, '5d0m0s', 2000.0, 'J2000'),
-                          (FK5_COORDS, None, 2000.0, 'J2000'),
+                          (FK5_COORDS, 2*u.arcmin, 2000.0, 'J2000'),
                           (multicoords, 0.5*u.arcsec, 2000.0, 'J2000'),
                           (multicoords, "0.5s", 2000.0, 'J2000'),
                           ])
@@ -253,10 +253,10 @@ def test_query_region_async(patch_post, coordinates, radius, equinox, epoch):
 
 
 @pytest.mark.parametrize(('coordinates', 'radius', 'equinox', 'epoch'),
-                         [(ICRS_COORDS, None, 2000.0, 'J2000'),
+                         [(ICRS_COORDS, 2*u.arcmin, 2000.0, 'J2000'),
                           (GALACTIC_COORDS, 5 * u.deg, 2000.0, 'J2000'),
                           (FK4_COORDS, '5d0m0s', 2000.0, 'J2000'),
-                          (FK5_COORDS, None, 2000.0, 'J2000')
+                          (FK5_COORDS, 2*u.arcmin, 2000.0, 'J2000')
                           ])
 def test_query_region(patch_post, coordinates, radius, equinox, epoch):
     result1 = simbad.core.Simbad.query_region(coordinates, radius=radius,