Fix Analysis Engine plugin setup.

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.
 
 @TestOn("vm")
 library analyzer_cli.test.driver;
 
 import 'dart:io';
 
 import 'package:analyzer/plugin/options.dart';
@@ skipping 17 matching lines @@
           '--options',
           'test/data/test_options.yaml',
           'test/data/test_file.dart'
         ]);
         expect(processor.options['test_plugin'], isNotNull);
         expect(processor.exception, isNull);
       });
     });
 
     group('linter', () {
-      test('gets analysis options', () {
-        Driver driver = new Driver();
+      StringSink savedOutSink;
+      Driver driver;
+
+      setUp(() {
+        savedOutSink = outSink;
+        outSink = new StringBuffer();
+
+        driver = new Driver();
         driver.start([
           '--options',
           'test/data/linter_project/.analysis_options',
           '--lints',
           'test/data/linter_project/test_file.dart'
         ]);
+      });
+      tearDown(() {
+        outSink = savedOutSink;
+      });
 
+      test('gets analysis options', () {
         /// Lints should be enabled.
         expect(driver.context.analysisOptions.lint, isTrue);
 
         /// The .analysis_options file only specifies 'camel_case_types'.
         var lintNames = linterPlugin.lintRules.map((r) => r.name);
         expect(lintNames, orderedEquals(['camel_case_types']));
       });
+
+      test('generates lints', () {
+        expect(outSink.toString(),
+            contains('[lint] Name types using UpperCamelCase.'));
+      });
     });
 
     group('in temp directory', () {
       StringSink savedOutSink, savedErrorSink;
       int savedExitCode;
       Directory savedCurrentDirectory;
       Directory tempDir;
       setUp(() {
         savedOutSink = outSink;
         savedErrorSink = errorSink;
@@ skipping 68 matching lines @@
       });
       test('bad format', () {
         BootLoader loader = new BootLoader();
         loader.createImage([
           '--options',
           'test/data/bad_plugin_options.yaml',
           'test/data/test_file.dart'
         ]);
         expect(
             errorSink.toString(),
-            equals(
-                'Plugin configuration skipped: Unrecognized plugin config format, expected `YamlMap`, got `YamlList` (line 2, column 4)\n'));
+            equals('Plugin configuration skipped: Unrecognized plugin config '
+                'format, expected `YamlMap`, got `YamlList` (line 2, column 4)\n'));
       });
       test('plugin config', () {
         BootLoader loader = new BootLoader();
         Image image = loader.createImage([
           '--options',
           'test/data/plugin_options.yaml',
           'test/data/test_file.dart'
         ]);
         var plugins = image.config.plugins;
         expect(plugins, hasLength(1));
@@ skipping 50 matching lines @@
   @override
   void onError(Exception exception) {
     this.exception = exception;
   }
 
   @override
   void optionsProcessed(Map<String, YamlNode> options) {
     this.options = options;
   }
 }