move CommandLineParser into analyzer for reuse by DDC

pkg/analyzer_cli/test/options_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.options;
 
 import 'dart:io';
 
 import 'package:analyzer_cli/src/driver.dart';
 import 'package:analyzer_cli/src/options.dart';
-import 'package:args/args.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 main() {
   group('CommandLineOptions', () {
     group('parse', () {
       test('defaults', () {
         CommandLineOptions options =
             CommandLineOptions.parse(['--dart-sdk', '.', 'foo.dart']);
         expect(options, isNotNull);
@@ skipping 123 matching lines @@
         expect(options.sourceFiles,
             equals(['foo.dart', 'foo2.dart', 'foo3.dart']));
       });
 
       test('warningsAreFatal', () {
         CommandLineOptions options = CommandLineOptions
             .parse(['--dart-sdk', '.', '--fatal-warnings', 'foo.dart']);
         expect(options.warningsAreFatal, isTrue);
       });
 
-      test('notice unrecognized flags', () {
-        expect(
-            () => new CommandLineParser().parse(['--bar', '--baz', 'foo.dart']),
-            throwsA(new isInstanceOf<FormatException>()));
-      });
-
       test('ignore unrecognized flags', () {
         CommandLineOptions options = CommandLineOptions.parse([
           '--ignore-unrecognized-flags',
           '--bar',
           '--baz',
           '--dart-sdk',
           '.',
           'foo.dart'
         ]);
         expect(options, isNotNull);
         expect(options.sourceFiles, equals(['foo.dart']));
       });
 
-      test('ignore unrecognized options', () {
-        CommandLineParser parser =
-            new CommandLineParser(alwaysIgnoreUnrecognized: true);
-        parser.addOption('optionA');
-        parser.addFlag('flagA');
-        ArgResults argResults =
-            parser.parse(['--optionA=1', '--optionB=2', '--flagA']);
-        expect(argResults['optionA'], '1');
-        expect(argResults['flagA'], isTrue);
-      });
-
       test('strong mode', () {
         CommandLineOptions options =
             CommandLineOptions.parse(['--strong', 'foo.dart']);
         expect(options.strongMode, isTrue);
       });
 
       test('hintsAreFatal', () {
         CommandLineOptions options = CommandLineOptions
             .parse(['--dart-sdk', '.', '--fatal-lints', 'foo.dart']);
         expect(options.lintsAreFatal, isTrue);
@@ skipping 156 matching lines @@
       'package:p/foo.dart|/path/to/p/lib/foo.dart'
     ]);
     expect(options.buildMode, isTrue);
     expect(options.buildSuppressExitCode, isTrue);
   }
 
   void _parse(List<String> args) {
     options = CommandLineOptions.parse(args);
   }
 }