Fix unit name serialization

We just store the unit name as specified and serialize that (instead of using the name as given in UnitsNet)

SaneTsv.cs

@@ -39,11 +39,13 @@ public class SaneTsv
   public class Iso8601Type : ColumnType { }
   public class PhysicalUnitsType : ColumnType
   {
+    public string UnitString { get; }
     public UnitsNet.UnitInfo Units { get; }
     public ColumnType BaseType { get; internal set; }
 
-    public PhysicalUnitsType(UnitsNet.UnitInfo units, ColumnType baseType) 
+    public PhysicalUnitsType(string unitString, UnitsNet.UnitInfo units, ColumnType baseType) 
     {
+      UnitString = unitString;
       Units = units;
       BaseType = baseType;
     }
@@ -306,7 +308,7 @@ public class SaneTsv
                 string unitName = columnTypeStrings[columnTypeStrings.Length - 3];
                 if (UnitsNet.Quantity.TryFromUnitAbbreviation(1, unitName, out UnitsNet.IQuantity quantity))
                 {
-                  type = new PhysicalUnitsType(UnitsNet.Quantity.GetUnitInfo(quantity.Unit), new Float64Type());
+                  type = new PhysicalUnitsType(unitName, UnitsNet.Quantity.GetUnitInfo(quantity.Unit), new Float64Type());
                 }
                 else
                 {
@@ -326,7 +328,7 @@ public class SaneTsv
                 string unitName = columnTypeStrings[columnTypeStrings.Length - 3];
                 if (UnitsNet.Quantity.TryFromUnitAbbreviation(1, unitName, out UnitsNet.IQuantity quantity))
                 {
-                  type = new PhysicalUnitsType(UnitsNet.Quantity.GetUnitInfo(quantity.Unit), new Float64LEType());
+                  type = new PhysicalUnitsType(unitName, UnitsNet.Quantity.GetUnitInfo(quantity.Unit), new Float64LEType());
                 }
                 else
                 {
@@ -1273,7 +1275,7 @@ public class SaneTsv
       string unitName = match.Groups[1].Value;
       string baseType = match.Groups[2].Value;
 
-      return new PhysicalUnitsType(ParseUnit(unitName), GetColumnFromString(baseType));
+      return new PhysicalUnitsType(unitName, ParseUnit(unitName), GetColumnFromString(baseType));
       //if (UnitsNet.Quantity.TryFromUnitAbbreviation(1, unitName, out UnitsNet.IQuantity quantity))
       //{
       //  return new PhysicalUnitsType(UnitsNet.Quantity.GetUnitInfo(quantity.Unit), GetColumnFromString(baseType));
@@ -1336,7 +1338,7 @@ public class SaneTsv
       // TODO
       //UnitsNet.UnitInfo a = new UnitsNet.UnitInfo([d])
       var a = new UnitsNet.UnitInfo<UnitsNet.Units.MassUnit>(UnitsNet.Units.MassUnit.Kilogram, "kgs", new UnitsNet.BaseUnits(mass: UnitsNet.Units.MassUnit.Kilogram));
-      return new PhysicalUnitsType(a, new Float64Type());
+      return new PhysicalUnitsType("kg", a, new Float64Type());
     }
     else
     {
@@ -1396,7 +1398,7 @@ public class SaneTsv
     }
     else if (type is PhysicalUnitsType unit)
     {
-      return $"{unit.Units.Name}:{UnitsTypeText}:{GetNameFromColumn(unit.BaseType)}"; 
+      return $"{unit.UnitString}:{UnitsTypeText}:{GetNameFromColumn(unit.BaseType)}"; 
     }
     else
     {

SaneTsvTest/Program.cs

@@ -101,14 +101,38 @@ internal class Program : SaneTsv
 
     {
       string testName = "Serde unit";
-      string testString1 = "# ExtraTSV V0.0.1\n" +
-        "id:uint32\tvalue:m/s:ph-unit:float64\n" +
-        "0\t1.5\n" +
-        "1\t5.4e3";
 
-      CommentedTsv<UnitTest> parsed = SaneTsv.ParseExtraTsv<UnitTest>(Encoding.UTF8.GetBytes(testString1));
-      string serialized = Encoding.UTF8.GetString(SaneTsv.SerializeExtraTsv<UnitTest>(parsed.Records));
-      if (testString1 == serialized)
+      UnitTest[] records = new UnitTest[]
+      {
+        new UnitTest
+        { 
+          Id = 1,
+          Value = UnitsNet.Speed.FromMetersPerSecond(5.03),
+        },
+        new UnitTest
+        { 
+          Id = 5,
+          Value = UnitsNet.Speed.FromMetersPerSecond(double.NaN),
+        },
+        new UnitTest
+        { 
+          Id = 1000000,
+          Value = UnitsNet.Speed.FromMetersPerSecond(9859873.498),
+        },
+      };
+
+      string serialized = Encoding.UTF8.GetString(SaneTsv.SerializeExtraTsv<UnitTest>(records));
+      CommentedTsv<UnitTest> parsed = SaneTsv.ParseExtraTsv<UnitTest>(Encoding.UTF8.GetBytes(serialized));
+
+      bool match = true;
+      for (int i = 0; i < records.Length; i++)
+      {
+        match = match && records[i].Id == parsed.Records[i].Id && 
+          (records[i].Value.Equals(parsed.Records[i].Value, UnitsNet.Speed.FromMetersPerSecond(1E-1))
+           || (double.IsNaN(records[i].Value.Value)  && double.IsNaN(parsed.Records[i].Value.Value)));
+      }
+
+      if (match)
       {
         Console.WriteLine($"Passed {testName}");
       }