make completion managers responsible for their own caches

pkg/analysis_server/test/services/completion/completion_computer_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.completion.suggestion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
@@ skipping 48 matching lines @@
   }
 
   @override
   void setUp() {
     super.setUp();
     index = createLocalMemoryIndex();
     searchEngine = new SearchEngineImpl(index);
     source = addSource('/does/not/exist.dart', '');
     cache = null;
     perf = new CompletionPerformance();
-    manager = new DartCompletionManager.create(
-        context,
-        searchEngine,
-        source,
-        0,
-        cache,
-        perf);
+    manager =
+        new DartCompletionManager.create(context, searchEngine, source, cache);
     suggestion1 = new CompletionSuggestion(
         CompletionSuggestionKind.INVOCATION,
         CompletionRelevance.DEFAULT,
         "suggestion1",
         1,
         1,
         false,
         false);
     suggestion2 = new CompletionSuggestion(
         CompletionSuggestionKind.IDENTIFIER,
         CompletionRelevance.DEFAULT,
         "suggestion2",
         2,
         2,
         false,
         false);
   }
 
   test_compute_fastAndFull() {
     computer1 = new MockCompletionComputer(suggestion1, null);
     computer2 = new MockCompletionComputer(null, suggestion2);
     manager.computers = [computer1, computer2];
     int count = 0;
     bool done = false;
-    manager.results().listen((CompletionResult r) {
+    CompletionRequest completionRequest = new CompletionRequest(0, perf);
+    manager.results(completionRequest).listen((CompletionResult r) {
       switch (++count) {
         case 1:
           computer1.assertCalls(context, source, 0, searchEngine);
           computer2.assertCalls(context, source, 0, searchEngine);
           expect(r.last, isFalse);
           expect(r.suggestions, hasLength(1));
           expect(r.suggestions, contains(suggestion1));
           resolveLibrary();
           break;
         case 2:
@@ skipping 15 matching lines @@
       expect(done, isTrue);
     });
   }
 
   test_compute_fastOnly() {
     computer1 = new MockCompletionComputer(suggestion1, null);
     computer2 = new MockCompletionComputer(suggestion2, null);
     manager.computers = [computer1, computer2];
     int count = 0;
     bool done = false;
-    manager.results().listen((CompletionResult r) {
+    CompletionRequest completionRequest = new CompletionRequest(0, perf);
+    manager.results(completionRequest).listen((CompletionResult r) {
       switch (++count) {
         case 1:
           computer1.assertCalls(context, source, 0, searchEngine);
           computer2.assertCalls(context, source, 0, searchEngine);
           expect(r.last, isTrue);
           expect(r.suggestions, hasLength(2));
           expect(r.suggestions, contains(suggestion1));
           expect(r.suggestions, contains(suggestion2));
           break;
         default:
@@ skipping 46 matching lines @@
   @override
   Future<bool> computeFull(DartCompletionRequest request) {
     this.request = request;
     fullCount++;
     if (fullSuggestion != null) {
       request.suggestions.add(fullSuggestion);
     }
     return new Future.value(fullSuggestion != null);
   }
 }