Fix analysis server 'analysis.getHover' when there is no hover information.

pkg/analysis_server/test/integration/analysis_domain_inttest.dart

 // Copyright (c) 2014, 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 test.integration.analysis.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_testing/reflective_tests.dart';
@@ skipping 118 matching lines @@
       tests.add(testHover('localVar)', 8, ['num', 'localVar'], 'local variable',
           ['num'], parameterRegexps: ['.*'], propagatedType: 'int'));
       tests.add(testHover('func(35', 4, ['func', 'int', 'param'], 'function',
           null, docRegexp: 'Documentation for func'));
       tests.add(testHover('35', 2, null, null, ['int'], isLiteral: true,
           parameterRegexps: ['int', 'param']));
       return Future.wait(tests);
     });
   }
 
-  fail_test_getHover_noInfo() {
+  test_getHover_noInfo() {
     String filename = 'test.dart';
     String pathname = normalizePath(filename);
     String text =
         r'''
 main() {
   // no code
 }
 ''';
     writeFile(filename, text);
     setAnalysisRoots(['']);
 
     // Note: analysis.getHover doesn't wait for analysis to complete--it simply
     // returns the latest results that are available at the time that the
     // request is made.  So wait for analysis to finish before testing anything.
     return analysisFinished.then((_) {
       return server.send(ANALYSIS_GET_HOVER, {
               'file': pathname,
               'offset': text.indexOf('no code')
             }).then((result) {
               expect(result, isAnalysisGetHoverResult);
               expect(result['hovers'], hasLength(0));
       });
     });
   }
 }
 
 main() {
   runReflectiveTests(AnalysisDomainIntegrationTest);
 }