Make filling in of ion_mobility field conditional on presence of ion_mobility value in sage input

Author: rodvrees

tests/test_io/test_sage.py

@@ -17,7 +17,7 @@
     pep=None,
     precursor_mz=643.0349916987367,
     retention_time=108.2854,
-    ion_mobility=0.0,
+    ion_mobility=None,
     protein_list=["sp|Q99536|VAT1_HUMAN"],
     rank=1,
     source="sage",
@@ -36,7 +36,6 @@
         "delta_rt_model": 0.993444,
         "aligned_rt": 0.993444,
         "predicted_rt": 0.0,
-        "predicted_mobility": 0.0,
         "matched_peaks": 22.0,
         "longest_b": 9.0,
         "longest_y": 12.0,