New test for multiple imports with the same prefix name.

pkg/analysis_server/test/services/search/search_engine_test.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.services.src.search.search_engine_internal;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
@@ skipping 443 matching lines @@
     var length = 'math.'.length;
     var expected = [
       _expectId(mainElement, kind, 'math.PI);', length: length),
       _expectId(mainElement, kind, 'math.Random()', length: length),
       _expectId(mainElement, kind, 'math.max(', length: length),
       _expectId(barElement, kind, 'math.Random bar()', length: length),
     ];
     await _verifyReferences(element, expected);
   }
 
+  test_searchReferences_ImportElement_withPrefix_forMultipleImports() async {
+    _indexTestUnit('''
+import 'dart:async' as p;
+import 'dart:math' as p;
+main() {
+  p.Random;
+  p.Future;
+}
+''');
+    Element mainElement = findElement('main');
+    var kind = MatchKind.REFERENCE;
+    var length = 'p.'.length;
+    {
+      ImportElement element = testLibraryElement.imports[0];
+      var expected = [
+        _expectId(mainElement, kind, 'p.Future;', length: length),
+      ];
+      await _verifyReferences(element, expected);
+    }
+    {
+      ImportElement element = testLibraryElement.imports[1];
+      var expected = [
+        _expectId(mainElement, kind, 'p.Random', length: length),
+      ];
+      await _verifyReferences(element, expected);
+    }
+  }
+
   test_searchReferences_LabelElement() async {
     _indexTestUnit('''
 main() {
 label:
   while (true) {
     if (true) {
       break label; // 1
     }
     break label; // 2
   }
@@ skipping 426 matching lines @@
     List<SearchMatch> matches = await searchEngine.searchReferences(element);
     _assertMatches(matches, expectedMatches);
     expect(matches, hasLength(expectedMatches.length));
   }
 
   static void _assertMatches(
       List<SearchMatch> matches, List<ExpectedMatch> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }