remove CompletionCache and obsolete tests, and cleanup imports

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/plugin/protocol/protocol.dart';
-import 'package:analysis_server/src/provisional/completion/completion_core.dart'
-    show CompletionRequest, CompletionResult;
-import 'package:analysis_server/src/services/completion/completion_core.dart';
-import 'package:analysis_server/src/services/completion/completion_manager.dart';
-import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
-import 'package:analysis_server/src/services/index/index.dart';
-import 'package:analysis_server/src/services/index/local_memory_index.dart';
-import 'package:analysis_server/src/services/search/search_engine.dart';
-import 'package:analysis_server/src/services/search/search_engine_internal.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/source.dart';
-import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
-
-import '../../abstract_single_unit.dart';
-import '../../utils.dart';
-
-main() {
-  initializeTestEnvironment();
-  defineReflectiveTests(DartCompletionManagerTest);
-}
-
-/**
- * Returns a [Future] that completes after pumping the event queue [times]
- * times. By default, this should pump the event queue enough times to allow
- * any code to run, as long as it's not waiting on some external event.
- */
-Future pumpEventQueue([int times = 20]) {
-  if (times == 0) return new Future.value();
-  // We use a delayed future to allow microtask events to finish. The
-  // Future.value or Future() constructors use scheduleMicrotask themselves and
-  // would therefore not wait for microtask callbacks that are scheduled after
-  // invoking this method.
-  return new Future.delayed(Duration.ZERO, () => pumpEventQueue(times - 1));
-}
-
-@reflectiveTest
-class DartCompletionManagerTest extends AbstractSingleUnitTest {
-  Index index;
-  SearchEngineImpl searchEngine;
-  Source source;
-  DartCompletionManager manager;
-  MockCompletionContributor contributor1;
-  MockCompletionContributor contributor2;
-  CompletionSuggestion suggestion1;
-  CompletionSuggestion suggestion2;
-  bool _continuePerformingAnalysis = true;
-
-  void resolveLibrary() {
-    context.resolveCompilationUnit(
-        source, context.computeLibraryElement(source));
-  }
-
-  @override
-  void setUp() {
-    super.setUp();
-    index = createLocalMemoryIndex();
-    searchEngine = new SearchEngineImpl(index);
-    source = addSource('/does/not/exist.dart', '');
-    manager =
-        new DartCompletionManager.create(context, searchEngine, source, []);
-    suggestion1 = new CompletionSuggestion(CompletionSuggestionKind.INVOCATION,
-        DART_RELEVANCE_DEFAULT, "suggestion1", 1, 1, false, false);
-    suggestion2 = new CompletionSuggestion(CompletionSuggestionKind.IDENTIFIER,
-        DART_RELEVANCE_DEFAULT, "suggestion2", 2, 2, false, false);
-    new Future(_performAnalysis);
-  }
-
-  @override
-  void tearDown() {
-    _continuePerformingAnalysis = false;
-  }
-
-  test_compute_fastAndFull() {
-    contributor1 = new MockCompletionContributor(suggestion1, null);
-    contributor2 = new MockCompletionContributor(null, suggestion2);
-    manager.contributors = [contributor1, contributor2];
-    int count = 0;
-    bool done = false;
-    CompletionRequest completionRequest =
-        new CompletionRequestImpl(context, provider, searchEngine, source, 0);
-    manager.results(completionRequest).listen((CompletionResult r) {
-      bool isLast = r is CompletionResultImpl ? r.isLast : true;
-      switch (++count) {
-        case 1:
-          contributor1.assertCalls(context, source, 0, searchEngine);
-          expect(contributor1.fastCount, equals(1));
-          expect(contributor1.fullCount, equals(0));
-          contributor2.assertCalls(context, source, 0, searchEngine);
-          expect(contributor2.fastCount, equals(1));
-          expect(contributor2.fullCount, equals(1));
-          expect(isLast, isTrue);
-          expect(r.suggestions, hasLength(2));
-          expect(r.suggestions, contains(suggestion1));
-          expect(r.suggestions, contains(suggestion2));
-          resolveLibrary();
-          break;
-        default:
-          fail('unexpected');
-      }
-    }, onDone: () {
-      done = true;
-      // There is only one notification
-      expect(count, equals(1));
-    });
-    return pumpEventQueue(250).then((_) {
-      expect(done, isTrue);
-    });
-  }
-
-  test_compute_fastOnly() {
-    contributor1 = new MockCompletionContributor(suggestion1, null);
-    contributor2 = new MockCompletionContributor(suggestion2, null);
-    manager.contributors = [contributor1, contributor2];
-    int count = 0;
-    bool done = false;
-    CompletionRequest completionRequest =
-        new CompletionRequestImpl(context, provider, searchEngine, source, 0);
-    manager.results(completionRequest).listen((CompletionResult r) {
-      bool isLast = r is CompletionResultImpl ? r.isLast : true;
-      switch (++count) {
-        case 1:
-          contributor1.assertCalls(context, source, 0, searchEngine);
-          expect(contributor1.fastCount, equals(1));
-          expect(contributor1.fullCount, equals(0));
-          contributor2.assertCalls(context, source, 0, searchEngine);
-          expect(contributor2.fastCount, equals(1));
-          expect(contributor2.fullCount, equals(0));
-          expect(isLast, isTrue);
-          expect(r.suggestions, hasLength(2));
-          expect(r.suggestions, contains(suggestion1));
-          expect(r.suggestions, contains(suggestion2));
-          break;
-        default:
-          fail('unexpected');
-      }
-    }, onDone: () {
-      done = true;
-      expect(count, equals(1));
-    });
-    return pumpEventQueue().then((_) {
-      expect(done, isTrue);
-    });
-  }
-
-  void _performAnalysis() {
-    if (!_continuePerformingAnalysis) {
-      return;
-    }
-    context.performAnalysisTask();
-    new Future(_performAnalysis);
-  }
-}
-
-class MockCompletionContributor extends DartCompletionContributor {
-  final CompletionSuggestion fastSuggestion;
-  final CompletionSuggestion fullSuggestion;
-  int fastCount = 0;
-  int fullCount = 0;
-  DartCompletionRequest request;
-
-  MockCompletionContributor(this.fastSuggestion, this.fullSuggestion);
-
-  assertCalls(AnalysisContext context, Source source, int offset,
-      SearchEngine searchEngine) {
-    expect(request.context, equals(context));
-    expect(request.source, equals(source));
-    expect(request.offset, equals(offset));
-    expect(request.searchEngine, equals(searchEngine));
-  }
-
-  assertFull(int fullCount) {
-    expect(this.fastCount, equals(1));
-    expect(this.fullCount, equals(fullCount));
-  }
-
-  @override
-  bool computeFast(DartCompletionRequest request) {
-    this.request = request;
-    fastCount++;
-    if (fastSuggestion != null) {
-      request.addSuggestion(fastSuggestion);
-    }
-    return fastSuggestion != null;
-  }
-
-  @override
-  Future<bool> computeFull(DartCompletionRequest request) {
-    this.request = request;
-    fullCount++;
-    if (fullSuggestion != null) {
-      request.addSuggestion(fullSuggestion);
-    }
-    return new Future.value(fullSuggestion != null);
-  }
-}