refactor code completion to allow for multiple suggestion computers

pkg/analysis_server/test/completion_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.domain.completion;
-
-import 'dart:async';
-
-import 'package:analysis_server/src/constants.dart';
-import 'package:analysis_server/src/domain_completion.dart';
-import 'package:analysis_server/src/protocol.dart';
-import 'package:analysis_services/completion/completion_suggestion.dart';
-import 'package:analysis_services/constants.dart';
-import 'package:analysis_services/index/index.dart' show Index;
-import 'package:analysis_services/index/local_memory_index.dart';
-import 'package:analysis_testing/reflective_tests.dart';
-import 'package:unittest/unittest.dart';
-
-import 'analysis_abstract.dart';
-
-main() {
-  groupSep = ' | ';
-  runReflectiveTests(CompletionTest);
-}
-
-@ReflectiveTestCase()
-class CompletionTest extends AbstractAnalysisTest {
-  String completionId;
-  int completionOffset;
-  List<CompletionSuggestion> suggestions = [];
-  bool suggestionsDone = false;
-
-  String addTestFile(String content) {
-    completionOffset = content.indexOf('^');
-    expect(completionOffset, isNot(equals(-1)), reason: 'missing ^');
-    int nextOffset = content.indexOf('^', completionOffset + 1);
-    expect(nextOffset, equals(-1), reason: 'too many ^');
-    return super.addTestFile(
-        content.substring(0, completionOffset)
-        + content.substring(completionOffset + 1));
-  }
-
-  void assertHasResult(CompletionSuggestionKind kind, String completion,
-      [CompletionRelevance relevance = CompletionRelevance.DEFAULT,
-      bool isDeprecated = false, bool isPotential = false]) {
-    var cs = suggestions.firstWhere((cs) => cs.completion == completion, orElse: () {
-      var completions = suggestions.map((s) => s.completion).toList();
-      fail('expected "$completion" but found\n $completions');
-    });
-    expect(cs.kind, equals(kind));
-    expect(cs.relevance, equals(relevance));
-    expect(cs.selectionOffset, equals(completion.length));
-    expect(cs.selectionLength, equals(0));
-    expect(cs.isDeprecated, equals(isDeprecated));
-    expect(cs.isPotential, equals(isPotential));
-  }
-
-  void assertNoResult(String completion) {
-    if (suggestions.any((cs) => cs.completion == completion)) {
-      fail('did not expect completion: $completion');
-    }
-  }
-
-  void assertValidId(String id) {
-    expect(id, isNotNull);
-    expect(id.isNotEmpty, isTrue);
-  }
-
-  @override
-  Index createIndex() {
-    return createLocalMemoryIndex();
-  }
-
-  Future getSuggestions() {
-    return waitForTasksFinished().then((_) {
-      Request request = new Request('0', COMPLETION_GET_SUGGESTIONS);
-      request.setParameter(FILE, testFile);
-      request.setParameter(OFFSET, completionOffset);
-      Response response = handleSuccessfulRequest(request);
-      completionId = response.getResult(ID);
-      assertValidId(completionId);
-      return waitForSuggestions();
-    });
-  }
-
-  void processNotification(Notification notification) {
-    if (notification.event == COMPLETION_RESULTS) {
-      String id = notification.getParameter(ID);
-      assertValidId(id);
-      if (id == completionId) {
-        expect(suggestionsDone, isFalse);
-        suggestionsDone = notification.getParameter(LAST);
-        expect(suggestionsDone, isNotNull);
-        for (Map<String, Object> json in notification.getParameter(RESULTS)) {
-          expect(json, isNotNull);
-          suggestions.add(new CompletionSuggestion.fromJson(json));
-        }
-      }
-    }
-  }
-
-  @override
-  void setUp() {
-    super.setUp();
-    createProject();
-    handler = new CompletionDomainHandler(server);
-  }
-
-  Future waitForSuggestions() {
-    if (suggestionsDone) {
-      return new Future.value();
-    }
-    return new Future.delayed(Duration.ZERO, waitForSuggestions);
-  }
-
-  test_suggestions_importedType() {
-    addTestFile('''
-      import 'dart:html';
-      main() {^}
-    ''');
-    return getSuggestions().then((_) {
-      assertHasResult(CompletionSuggestionKind.CLASS, 'Object');
-      assertHasResult(CompletionSuggestionKind.CLASS, 'HtmlElement');
-      assertNoResult('test');
-    });
-  }
-
-  test_suggestions_topLevel() {
-    addTestFile('''
-      typedef foo();
-      var test^ = '';
-      main() {test.}
-    ''');
-    return getSuggestions().then((_) {
-      assertHasResult(CompletionSuggestionKind.CLASS, 'Object');
-      assertHasResult(CompletionSuggestionKind.TOP_LEVEL_VARIABLE, 'test');
-      assertNoResult('HtmlElement');
-    });
-  }
-}