fix broken test

mzLib/Omics/SpectrumMatch/LibrarySpectrum.cs

@@ -8,7 +8,7 @@ namespace Omics.SpectrumMatch
     public class LibrarySpectrum
     {
         public string Sequence { get; set; }
-        public double RetentionTime { get; set; }
+        public double? RetentionTime { get; set; }
         public double PrecursorMz { get; set; }
         public int ChargeState { get; set; }
         public List<MatchedFragmentIon> MatchedFragmentIons { get; set; }
@@ -21,7 +21,7 @@ public string Name
             get { return Sequence + "/" + ChargeState; }
         }
 
-        public LibrarySpectrum(string sequence, double precursorMz, int chargeState, List<MatchedFragmentIon> peaks, double rt, bool isDecoy = false)
+        public LibrarySpectrum(string sequence, double precursorMz, int chargeState, List<MatchedFragmentIon> peaks, double? rt, bool isDecoy = false)
         {
             Sequence = sequence;
             PrecursorMz = precursorMz;

mzLib/Omics/SpectrumMatch/SpectrumMatchFromTsv.cs

@@ -597,7 +597,7 @@ public LibrarySpectrum ToLibrarySpectrum()
                 fragments.Add(new MatchedFragmentIon(product, ion.Mz, ion.Intensity / matchedIonIntensitySum, ion.Charge));
             }
 
-            return (new(this.FullSequence, this.PrecursorMz, this.PrecursorCharge, fragments, this.RetentionTime.Value, isDecoy));
+            return (new(this.FullSequence, this.PrecursorMz, this.PrecursorCharge, fragments, this.RetentionTime, isDecoy));
         }
     }
 }

mzLib/Proteomics/PSM/PsmFromTsv.cs

@@ -42,7 +42,6 @@ public class PsmFromTsv : SpectrumMatchFromTsv
         public Dictionary<int, List<MatchedFragmentIon>> BetaPeptideChildScanMatchedIons { get; }
         public double? XLTotalScore { get; }
         public string ParentIons { get; }
-        public double? RetentionTime { get; }
 
         //For Glyco
         public string GlycanStructure { get; set; }