[enhanced-parts] test “Organize Imports”

Fixes: https://github.com/dart-lang/sdk/issues/56683

Change-Id: I6b6aae385d4313e551f7c110e1e2544cc418a5a8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/384308
Commit-Queue: Phil Quitslund <pquitslund@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Auto-Submit: Phil Quitslund <pquitslund@google.com>

pkg/analysis_server/test/src/services/correction/fix/fix_processor.dart

@@ -17,6 +17,7 @@ import 'package:analyzer/src/services/available_declarations.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart'
     hide AnalysisError;
 import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
+import 'package:analyzer_utilities/test/experiments/experiments.dart';
 import 'package:meta/meta.dart';
 import 'package:test/test.dart';
 
@@ -89,7 +90,7 @@ abstract class BulkFixProcessorTest extends AbstractSingleUnitTest {
   late BulkFixProcessor processor;
 
   @override
-  List<String> get experiments => const [];
+  List<String> get experiments => experimentsForTests;
 
   /// The name of the lint code being tested.
   String? get lintCode => null;

pkg/analysis_server/test/src/services/correction/fix/organize_imports_test.dart

@@ -12,31 +12,79 @@ import 'fix_processor.dart';
 void main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(OrganizeImportsBulkTest);
-    defineReflectiveTests(OrganizeImportsTest);
+    defineReflectiveTests(OrganizeImportsDirectivesOrderingTest);
   });
 }
 
 @reflectiveTest
 class OrganizeImportsBulkTest extends BulkFixProcessorTest {
+  Future<void> test_partFile() async {
+    newFile('$testPackageLibPath/a.dart', r'''
+part 'test.dart';
+''');
+
+    await resolveTestCode('''
+part of 'a.dart';
+
+import 'dart:io';
+import 'dart:async';
+
+Future? a;
+''');
+
+    await assertOrganize('''
+part of 'a.dart';
+
+import 'dart:async';
+import 'dart:io';
+
+Future? a;
+''');
+  }
+
   Future<void> test_single_file() async {
     await parseTestCode('''
 import 'dart:io';
 import 'dart:async';
 
-Future a;
+Future? a;
 ''');
 
     await assertOrganize('''
 import 'dart:async';
 import 'dart:io';
 
-Future a;
+Future? a;
+''');
+  }
+
+  Future<void> test_withParts() async {
+    newFile('$testPackageLibPath/a.dart', r'''
+part of 'test.dart';
+''');
+
+    await parseTestCode('''
+import 'dart:io';
+import 'dart:async';
+
+part 'a.dart';
+
+Future? a;
+''');
+
+    await assertOrganize('''
+import 'dart:async';
+import 'dart:io';
+
+part 'a.dart';
+
+Future? a;
 ''');
   }
 }
 
 @reflectiveTest
-class OrganizeImportsTest extends FixProcessorLintTest {
+class OrganizeImportsDirectivesOrderingTest extends FixProcessorLintTest {
   @override
   FixKind get kind => DartFixKind.ORGANIZE_IMPORTS;