Refactoring analyzer_cli for code hygiene.

pkg/analyzer_cli/test/driver_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_cli.test.driver;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
 import 'package:analyzer/source/error_processor.dart';
 import 'package:analyzer/src/error/codes.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/services/lint.dart';
 import 'package:analyzer/src/summary/idl.dart';
+import 'package:analyzer_cli/src/analyzer_driver.dart';
+import 'package:analyzer_cli/src/analyzer_options.dart';
 import 'package:analyzer_cli/src/ansi.dart' as ansi;
-import 'package:analyzer_cli/src/driver.dart';
-import 'package:analyzer_cli/src/options.dart';
 import 'package:cli_util/cli_util.dart' show getSdkDir;
 import 'package:path/path.dart' as path;
 import 'package:test/test.dart';
 import 'package:yaml/src/yaml_node.dart';
 
 import 'utils.dart';
 
 main() {
   StringSink savedOutSink, savedErrorSink;
   int savedExitCode;
@@ skipping 581 matching lines @@
 
 class TestSource implements Source {
   TestSource();
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }
 
 /// Normalize text with bullets.
 String _bulletToDash(item) => '$item'.replaceAll('•', '-');