Fix to model factory invoking of full constructor

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/src/Providers/ModelFactoryProvider.cs

@@ -96,11 +96,8 @@ protected override MethodProvider[] BuildMethods()
                             binaryDataParam = constructor.Signature.Parameters
                                 .FirstOrDefault(p => p?.Type.Equals(typeof(IDictionary<string, BinaryData>)) == true, binaryDataParam);
 
-                            if (customCtorParamCount > fullCtorParamCount)
-                            {
-                                fullConstructor = constructor;
-                                break;
-                            }
+                            fullConstructor = constructor;
+                            break;
                         }
                     }
                 }

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/test/Providers/ModelFactories/ModelFactoriesCustomizationTests.cs

@@ -125,8 +125,9 @@ public async Task CanChangeAccessibilityOfModelFactory()
             ValidateModelFactoryCommon(modelFactory);
         }
 
-        [Test]
-        public async Task CanCustomizeModelFullConstructor()
+        [TestCase(true)]
+        [TestCase(false)]
+        public async Task CanCustomizeModelFullConstructor(bool extraParameters)
         {
             var plugin = await MockHelpers.LoadMockPluginAsync(
                inputModelTypes: [
@@ -137,7 +138,7 @@ public async Task CanCustomizeModelFullConstructor()
                             InputFactory.Property("Prop1", InputPrimitiveType.String, isRequired: true),
                         ])
                ],
-               compilation: async () => await Helpers.GetCompilationFromDirectoryAsync(),
+               compilation: async () => await Helpers.GetCompilationFromDirectoryAsync(extraParameters.ToString()),
                additionalMetadataReferences: [MetadataReference.CreateFromFile(typeof(BinaryData).Assembly.Location)]);
 
             var csharpGen = new CSharpGen();
@@ -159,13 +160,22 @@ public async Task CanCustomizeModelFullConstructor()
             var modelFactoryMethod = modelFactoryMethods[0];
             Assert.AreEqual("MockInputModel", modelFactoryMethod.Signature.Name);
 
-            Assert.AreEqual(2, modelFactoryMethod.Signature.Parameters.Count);
-            Assert.AreEqual("data", modelFactoryMethod.Signature.Parameters[0].Name);
-            Assert.AreEqual("prop1", modelFactoryMethod.Signature.Parameters[1].Name);
-
-            Assert.IsTrue(modelFactoryMethod.BodyStatements!.ToDisplayString()
-                .Contains("return new global::Sample.Models.MockInputModel(data?.ToList(), prop1, additionalBinaryDataProperties: null);"),
-                modelFactoryMethod.BodyStatements!.ToDisplayString());
+            Assert.AreEqual(extraParameters ? 2 : 1, modelFactoryMethod.Signature.Parameters.Count);
+            if (extraParameters)
+            {
+                Assert.AreEqual("data", modelFactoryMethod.Signature.Parameters[0].Name);
+                Assert.AreEqual("prop1", modelFactoryMethod.Signature.Parameters[1].Name);
+                Assert.IsTrue(modelFactoryMethod.BodyStatements!.ToDisplayString()
+                        .Contains("return new global::Sample.Models.MockInputModel(data?.ToList(), prop1, additionalData: null);"),
+                    modelFactoryMethod.BodyStatements!.ToDisplayString());
+            }
+            else
+            {
+                Assert.AreEqual("prop1", modelFactoryMethod.Signature.Parameters[0].Name);
+                Assert.IsTrue(modelFactoryMethod.BodyStatements!.ToDisplayString()
+                        .Contains("return new global::Sample.Models.MockInputModel(prop1, additionalData: null);"),
+                    modelFactoryMethod.BodyStatements!.ToDisplayString());
+            }
         }
     }
 }

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/test/Providers/ModelFactories/TestData/ModelFactoriesCustomizationTests/CanCustomizeModelFullConstructor(False)/MockInputModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using Microsoft.Generator.CSharp.Customization;
+
+#nullable disable
+
+namespace Sample.Models;
+
+public partial class MockInputModel
+{
+    internal MockInputModel(string prop1, IDictionary<string, BinaryData> additionalData)
+    {
+        Prop1 = prop1;
+        _additionalBinaryDataProperties = additionalData;
+    }
+}

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/test/Providers/ModelFactories/TestData/ModelFactoriesCustomizationTests/CanCustomizeModelFullConstructor/MockInputModel.cs → packages/http-client-csharp/generator/Microsoft.Generator.CSharp/test/Providers/ModelFactories/TestData/ModelFactoriesCustomizationTests/CanCustomizeModelFullConstructor(True)/MockInputModel.cs

@@ -12,10 +12,10 @@ public partial class MockInputModel
 {
     private readonly IReadOnlyList<MockInputModel> _data;
 
-    internal MockInputModel(IReadOnlyList<MockInputModel> data, string prop1, IDictionary<string, BinaryData> additionalBinaryDataProperties)
+    internal MockInputModel(IReadOnlyList<MockInputModel> data, string prop1, IDictionary<string, BinaryData> additionalData)
     {
         Prop1 = prop1;
         _data = data;
-        _additionalBinaryDataProperties = additionalBinaryDataProperties;
+        _additionalBinaryDataProperties = additionalData;
     }
 }