Support for --fatal-hints.

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 16 matching lines @@
         driver.start([
           '--options',
           'test/data/test_options.yaml',
           'test/data/test_file.dart'
         ]);
         expect(processor.options['test_plugin'], isNotNull);
         expect(processor.exception, isNull);
       });
     });
 
+    group('exit codes', () {
+      int savedExitCode;
+      setUp(() {
+        savedExitCode = exitCode;
+      });
+      tearDown(() {
+        exitCode = savedExitCode;
+      });
+
+      test('fatal hints', () {
+        Driver driver = new Driver();
+        driver.start(['--fatal-hints', 'test/data/file_with_hint.dart']);
+        expect(exitCode, 3);
+      });
+
+      test('not fatal hints', () {
+        Driver driver = new Driver();
+        driver.start(['test/data/file_with_hint.dart']);
+        expect(exitCode, 0);
+      });
+
+      test('fatal errors', () {
+        Driver driver = new Driver();
+        driver.start(['test/data/file_with_error.dart']);
+        expect(exitCode, 3);
+      });
+
+      test('not fatal warnings', () {
+        Driver driver = new Driver();
+        driver.start(['test/data/file_with_warning.dart']);
+        expect(exitCode, 0);
+      });
+
+      test('fatal warnings', () {
+        Driver driver = new Driver();
+        driver.start(['--fatal-warnings', 'test/data/file_with_warning.dart']);
+        expect(exitCode, 3);
+      });
+    });
+
     group('linter', () {
       StringSink savedOutSink;
       Driver driver;
 
       setUp(() {
         savedOutSink = outSink;
         outSink = new StringBuffer();
 
         driver = new Driver();
         driver.start([
@@ skipping 173 matching lines @@
   @override
   void onError(Exception exception) {
     this.exception = exception;
   }
 
   @override
   void optionsProcessed(Map<String, YamlNode> options) {
     this.options = options;
   }
 }