fix dartanalyzer find options in bazel workspace

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';
@@ skipping 99 matching lines @@
 
       test('extra part file', () async {
         Driver driver = new Driver();
         await driver.start([
           path.join(testDirectory, 'data/library_and_parts/lib.dart'),
           path.join(testDirectory, 'data/library_and_parts/part1.dart'),
           path.join(testDirectory, 'data/library_and_parts/part2.dart')
         ]);
         expect(exitCode, 3);
       });
+
+      test('bazel workspace relative path', () async {
+        // Copy to temp dir so that existing analysis options
+        // in the test directory hierarchy do not interfere
+        await withTempDirAsync((String tempDirPath) async {
+          await recursiveCopy(
+              new Directory(path.join(testDirectory, 'data', 'bazel')),
+              tempDirPath);
+          Directory origWorkingDir = Directory.current;
+          try {
+            Directory.current = path.join(tempDirPath, 'proj');
+            Driver driver = new Driver();
+            await driver.start([path.join('lib', 'file.dart')]);
+            expect(errorSink.toString(), isEmpty);
+            expect(outSink.toString(), contains('No issues found'));
+            expect(exitCode, 0);
+          } finally {
+            Directory.current = origWorkingDir;
+          }
+        });
+      });
     });
 
     group('linter', () {
       void createTests(String designator, String optionsFileName) {
         group('lints in options - $designator', () {
           // Shared lint command.
           Future<Null> runLinter() async {
             return await drive('data/linter_project/test_file.dart',
                 options: 'data/linter_project/$optionsFileName',
                 args: ['--lints']);
@@ skipping 397 matching lines @@
 
 ErrorProcessor processorFor(AnalysisError error) =>
     processors.firstWhere((p) => p.appliesTo(error));
 
 class TestSource implements Source {
   TestSource();
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }