update

Author: msyyc

packages/http-client-python/.gitignore

@@ -22,8 +22,6 @@ tests/**/generated/*
 tests/generated/azure/*
 !tests/generated/azure/authentication-api-key/
 !tests/generated/azure/authentication-api-key/**
-!tests/generated/azure/authentication-union/
-!tests/generated/azure/authentication-union/**
 !tests/generated/azure/generation-subdir/
 !tests/generated/azure/generation-subdir/**
 !tests/generated/azure/generation-subdir2/

packages/http-client-python/eng/scripts/ci/regenerate-common.ts

@@ -657,13 +657,19 @@ export async function runParallel(
 export async function cleanGeneratedCodePreservingFixtures(generatedFolder: string): Promise<void> {
   const testsGeneratedDir = resolve(generatedFolder, "../tests/generated");
   const preservedFixturePaths = new Set([
+    // Keeps patch_added_operation in _operations/_patch.py for shared patch tests.
     "azure/authentication-api-key",
+    // Keeps the same operation patch for the unbranded test run.
     "unbranded/authentication-api-key",
-    "azure/authentication-union",
+    // Keeps the hand-authored CustomizedClient wrapper outside _generated.
     "azure/generation-subdir",
+    // Keeps the hand-authored AddedClient wrapper outside _generated.
     "azure/generation-subdir2",
+    // Keeps the CustomizedClient wrapper for the unbranded test run.
     "unbranded/generation-subdir",
+    // Keeps the AddedClient wrapper for the unbranded test run.
     "unbranded/generation-subdir2",
+    // Keeps custom GeoJSON serializers and deserializers registered in models/_patch.py.
     "azure/azure-client-generator-core-alternate-type",
   ]);