specify order of tests

py/desiutil/names.py

@@ -43,14 +43,14 @@ def radec_to_desiname(target_ra, target_dec):
     target_ra, target_dec = np.atleast_1d(target_ra), np.atleast_1d(target_dec)
 
     inputs = {'target_ra': target_ra, 'target_dec': target_dec}
-    tests = {'NaN values': np.isnan,
-             'Infinite values': np.isinf,
-             'RA not in range [0, 360)': lambda x: (x < 0) | (x >= 360),
-             'Dec not in range [-90, 90]': lambda x: (x < -90) | (x > 90)}
+    tests = (('NaN values', np.isnan),
+             ('Infinite values', np.isinf),
+             ('RA not in range [0, 360)', lambda x: (x < 0) | (x >= 360)),
+             ('Dec not in range [-90, 90]', lambda x: (x < -90) | (x > 90)))
     for i in inputs:
-        for t in tests:
-            if (tests[t](inputs[i])).any():
-                raise ValueError(f"{t} detected in {i}!")
+        for key, check in tests:
+            if (check(inputs[i])).any():
+                raise ValueError(f"{key} detected in {i}!")
 
     # Number of decimal places in final naming convention
     precision = 4

py/desiutil/test/test_names.py

@@ -56,3 +56,8 @@ def test_radec_to_desiname_bad_values(self):
         with self.assertRaises(ValueError) as e:
             outnames = radec_to_desiname(ras, decs)
         self.assertEqual(str(e.exception), "NaN values detected in target_ra!")
+
+        ras[2] = np.inf
+        with self.assertRaises(ValueError) as e:
+            outnames = radec_to_desiname(ras, decs)
+        self.assertEqual(str(e.exception), "Infinite values detected in target_ra!")