refactor code completion to allow for multiple suggestion computers

pkg/analysis_services/test/completion/completion_test_util.dart

Index: pkg/analysis_services/test/completion/completion_test_util.dart
diff --git a/pkg/analysis_services/test/completion/top_level_computer_test.dart b/pkg/analysis_services/test/completion/completion_test_util.dart
similarity index 76%
copy from pkg/analysis_services/test/completion/top_level_computer_test.dart
copy to pkg/analysis_services/test/completion/completion_test_util.dart
index 113f5fd3c994e6e40febd91f18965d0529337118..c0690502a5b4040fea5dffeae61cdde908b75ecc 100644
--- a/pkg/analysis_services/test/completion/top_level_computer_test.dart
+++ b/pkg/analysis_services/test/completion/completion_test_util.dart
@@ -2,38 +2,24 @@
 // 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.completion.toplevel;
+library test.services.completion.util;
 
+import 'dart:async';
+
+import 'package:analysis_services/completion/completion_computer.dart';
 import 'package:analysis_services/completion/completion_suggestion.dart';
-import 'package:analysis_services/completion/top_level_computer.dart';
 import 'package:analysis_services/index/index.dart';
 import 'package:analysis_services/index/local_memory_index.dart';
 import 'package:analysis_services/src/search/search_engine.dart';
 import 'package:analysis_testing/abstract_single_unit.dart';
-import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart';
-import 'dart:async';
-
-main() {
-  groupSep = ' | ';
-  runReflectiveTests(TopLevelComputerTest);
-}
 
-@ReflectiveTestCase()
-class TopLevelComputerTest extends AbstractSingleUnitTest {
+class AbstractCompletionTest extends AbstractSingleUnitTest {
   Index index;
   SearchEngineImpl searchEngine;
-  TopLevelComputer computer;
+  CompletionComputer computer;
   List<CompletionSuggestion> suggestions;
 
-  test_class() {
-    addTestUnit('class B {boolean v;}');
-    return compute().then((_) {
-      assertHasResult(CompletionSuggestionKind.CLASS, 'B');
-      assertNoResult('v');
-    });
-  }
-
   void addTestUnit(String code) {
     resolveTestUnit(code);
     index.indexUnit(context, testUnit);
@@ -71,7 +57,6 @@ class TopLevelComputerTest extends AbstractSingleUnitTest {
     super.setUp();
     index = createLocalMemoryIndex();
     searchEngine = new SearchEngineImpl(index);
-    computer = new TopLevelComputer(searchEngine);
     verifyNoTestUnitErrors = false;
   }
 }