Rename modelfactory for Arm (#50862)

* Rename modelfactory for Arm

* skip resource-manager generation for azure generator

Author: live1206

eng/packages/http-client-csharp/eng/scripts/Generate.ps1

@@ -84,6 +84,7 @@ $failingSpecs = @(
     Join-Path 'http' 'azure' 'resource-manager' 'non-resource'
     Join-Path 'http' 'azure' 'resource-manager' 'operation-templates'
     Join-Path 'http' 'azure' 'resource-manager' 'resources'
+    Join-Path 'http' 'azure' 'resource-manager' 'large-header'
 
 )
 

eng/packages/http-client-csharp/generator/Azure.Generator/src/Properties/launchSettings.json

@@ -50,11 +50,6 @@
       "commandName": "Executable",
       "executablePath": "dotnet"
     },
-    "http-azure-resource-manager-large-header": {
-      "commandLineArgs": "$(SolutionDir)/../dist/generator/Microsoft.TypeSpec.Generator.dll $(SolutionDir)/TestProjects/Spector/http/azure/resource-manager/large-header -g AzureStubGenerator",
-      "commandName": "Executable",
-      "executablePath": "dotnet"
-    },
     "http-azure-special-headers-client-request-id": {
       "commandLineArgs": "$(SolutionDir)/../dist/generator/Microsoft.TypeSpec.Generator.dll $(SolutionDir)/TestProjects/Spector/http/azure/special-headers/client-request-id -g AzureStubGenerator",
       "commandName": "Executable",

eng/packages/http-client-csharp/generator/Azure.Generator/src/Utilities/TypeNameUtilities.cs

@@ -8,6 +8,7 @@ namespace Azure.Generator.Utilities
     internal static class TypeNameUtilities
     {
         private const string AzurePackageNamespacePrefix = "Azure.";
+        private const string AzureResourceManagerPackageNamespacePrefix = "Azure.ResourceManager.";
 
         /// <summary>
         /// Returns the name of the RP from the package name using the following:
@@ -19,6 +20,10 @@ public static string GetResourceProviderName()
         {
             var packageName = AzureClientGenerator.Instance.Configuration.PackageName;
             var segments = packageName.Split('.');
+            if (packageName.StartsWith(AzureResourceManagerPackageNamespacePrefix))
+            {
+                return $"Arm{string.Join("", segments.Skip(2))}";
+            }
             if (packageName.StartsWith(AzurePackageNamespacePrefix))
             {
                 if (segments.Length > 2)

eng/packages/http-client-csharp/generator/Azure.Generator/test/Visitors/ModelFactoryRenamerVisitorTests.cs

@@ -40,7 +40,7 @@ public void MgmtPlaneModelFactoryIsNamedCorrectly()
             var modelFactory = plugin.Object.OutputLibrary.TypeProviders.OfType<ModelFactoryProvider>().SingleOrDefault();
 
             Assert.IsNotNull(modelFactory);
-            Assert.AreEqual("SomeServiceModelFactory", modelFactory!.Type.Name);
+            Assert.AreEqual("ArmSomeServiceModelFactory", modelFactory!.Type.Name);
         }
 
         [Test]