Issue 20240. Use a FileManager that manages its own temporary directory.

pkg/analysis_services/test/index/store/separate_file_manager_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.index.store.separate_file_mananer;
-
-import 'dart:io';
-
-import 'package:analysis_services/src/index/store/separate_file_manager.dart';
-import 'package:analysis_testing/reflective_tests.dart';
-import 'package:path/path.dart';
-import 'package:unittest/unittest.dart';
-
-
-main() {
-  groupSep = ' | ';
-  runReflectiveTests(_SeparateFileManagerTest);
-}
-
-
-@ReflectiveTestCase()
-class _SeparateFileManagerTest {
-  Directory tempDir;
-  SeparateFileManager fileManager;
-
-  void setUp() {
-    tempDir = Directory.systemTemp.createTempSync('AnalysisServer_index');
-    fileManager = new SeparateFileManager(tempDir);
-  }
-
-  void tearDown() {
-    tempDir.delete(recursive: true);
-  }
-
-  test_clear() {
-    String name = "42.index";
-    // create the file
-    return fileManager.write(name, <int>[1, 2, 3, 4]).then((_) {
-      // check that the file exists
-      expect(_existsSync(name), isTrue);
-      // clear
-      fileManager.clear();
-      expect(_existsSync(name), isFalse);
-    });
-  }
-
-  test_delete_doesNotExist() {
-    String name = "42.index";
-    fileManager.delete(name);
-  }
-
-  test_outputInput() {
-    String name = "42.index";
-    // create the file
-    return fileManager.write(name, <int>[1, 2, 3, 4]).then((_) {
-      // check that that the file exists
-      expect(_existsSync(name), isTrue);
-      // read the file
-      return fileManager.read(name).then((bytes) {
-        expect(bytes, <int>[1, 2, 3, 4]);
-        // delete
-        fileManager.delete(name);
-        // the file does not exist anymore
-        return fileManager.read(name).then((bytes) {
-          expect(bytes, isNull);
-        });
-      });
-    });
-  }
-
-  bool _existsSync(String name) {
-    return new File(join(tempDir.path, name)).existsSync();
-  }
-}