Add example about custom Mosfet

Author: marcin-golebiowski

src/SpiceSharpParser.IntegrationTests/Examples/Circuits/MosfetExample.cir

@@ -0,0 +1,4 @@
+Mosfet circuit
+Md 0 1 2 3 my-pmos
+.model my-pmos pmos(level = 4)
+.END

src/SpiceSharpParser.IntegrationTests/Examples/Extensions/CustomMosfetModelGenerator.cs

@@ -0,0 +1,28 @@
+using SpiceSharp.Components;
+using SpiceSharpParser.ModelReaders.Netlist.Spice.Context.Models;
+using SpiceSharpParser.ModelReaders.Netlist.Spice.Readers.EntityGenerators;
+using SpiceSharpParser.ModelReaders.Netlist.Spice.Readers.EntityGenerators.Models;
+
+namespace SpiceSharpParser.IntegrationTests.Examples.Extensions
+{
+    public class CustomMosfetModelGenerator : MosfetModelGenerator
+    {
+
+        public CustomMosfetModelGenerator()
+        {
+            Levels.Add(4, (name, type, _) =>
+            {
+                var m = new Mosfet3Model(name);
+                switch (type.ToLower())
+                {
+                    case "nmos": m.SetParameter("nmos", true); break;
+                    case "pmos": m.SetParameter("pmos", true); break;
+                }
+
+                return new Model(name, m, m.Parameters);
+            });
+        }
+
+
+    }
+}

src/SpiceSharpParser.IntegrationTests/Examples/Extensions/CustomMosfetModelTest.cs

@@ -0,0 +1,28 @@
+using System.IO;
+using Xunit;
+
+namespace SpiceSharpParser.IntegrationTests.Examples.Extensions
+{
+    public class CustomMosfetModelTest : BaseTests
+    {
+        [Fact]
+        public void When_CustomMosfetModel_Used_NoExceptions()
+        {
+            // Create a model from text file
+            string path = Path.Combine(Directory.GetCurrentDirectory(), "Examples/Circuits/MosfetExample.cir");
+            var netlistContent = File.ReadAllText(path);
+            var parser = new SpiceNetlistParser();
+            parser.Settings.Lexing.HasTitle = true;
+            var parseResult = parser.ParseNetlist(netlistContent);
+
+            // Convert to Spice#
+            var spiceSharpReader = new SpiceSharpReader();
+            spiceSharpReader.Settings.CaseSensitivity.IsModelTypeCaseSensitive = false;
+            spiceSharpReader.Settings.Mappings.Models.Map(new[] { "PMOS", "NMOS" }, new CustomMosfetModelGenerator());
+            var spiceSharpModel = spiceSharpReader.Read(parseResult.FinalModel);
+
+            Assert.False(spiceSharpModel.ValidationResult.HasError);
+            Assert.False(spiceSharpModel.ValidationResult.HasWarning);
+        }
+    }
+}

src/SpiceSharpParser.IntegrationTests/SpiceSharpParser.IntegrationTests.csproj

@@ -90,6 +90,9 @@
     <None Update="Examples\Circuits\Example04_reversed.cir">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Update="Examples\Circuits\MosfetExample.cir">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Update="Resources\pwl_reference.txt">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>

src/SpiceSharpParser/ModelReaders/Netlist/Spice/Readers/EntityGenerators/Components/Semiconductors/MosfetGenerator.cs

@@ -78,9 +78,9 @@ public override IEntity Generate(string componentIdentifier, string originalName
                 return null;
             }
 
-            if (Mosfets.ContainsKey(model.GetType()))
+            if (Mosfets.ContainsKey(model.Entity.GetType()))
             {
-                var mosfetDetails = Mosfets[model.GetType()].Invoke(componentIdentifier);
+                var mosfetDetails = Mosfets[model.Entity.GetType()].Invoke(componentIdentifier);
                 mosfet = mosfetDetails.Mosfet;
 
                 context.SimulationPreparations.ExecuteActionBeforeSetup((simulation) =>