N and S have the same extinction_total_to_selective_ratio because we …

…make the choice to keep the same values as in the legacy surveys

py/desiutil/test/test_dust.py

@@ -132,10 +132,10 @@ def test_total_to_selective(self):
                 self.assertEqual(rb1, rb2)
 
         #- North and South should be different
-        for band in ['G', 'R', 'Z']:
-            rb1 = dust.extinction_total_to_selective_ratio(band, 'N')
-            rb2 = dust.extinction_total_to_selective_ratio(band, 'S')
-            self.assertNotEqual(rb1, rb2)
+        #for band in ['G', 'R', 'Z']:
+        #    rb1 = dust.extinction_total_to_selective_ratio(band, 'N')
+        #    rb2 = dust.extinction_total_to_selective_ratio(band, 'S')
+        #    self.assertNotEqual(rb1, rb2)
 
         #- B is not a supported band (G,R,Z)
         with self.assertRaises(AssertionError):
@@ -164,8 +164,8 @@ def test_mwdust_transmission(self):
         self.assertEqual(len(tn), len(ebv))
         self.assertEqual(len(ts), len(ebv))
         #- N vs. S should be different where ebv>0
-        ii = (ebv>0)
-        self.assertTrue(np.all(tn[ii] != ts[ii]))
+        #ii = (ebv>0)
+        #self.assertTrue(np.all(tn[ii] != ts[ii]))
 
         #- array photsys must have ebv array of same length
         with self.assertRaises(ValueError):