A FileManager implementation to keep each index file in a separate file system file.

pkg/analysis_server/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.index.store.separate_file_mananer;
+
+import 'dart:io';
+
+import 'package:analysis_server/src/index/store/separate_file_manager.dart';
+import 'package:path/path.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../reflective_tests.dart';
+
+
+main() {
+  groupSep = ' | ';
+  group('SeparateFileManager', () {
+    runReflectiveTests(_SeparateFileManagerTest);
+  });
+}
+
+
+@ReflectiveTestCase()
+class _SeparateFileManagerTest {
+  SeparateFileManager fileManager;
+  Directory tempDir;
+
+  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();
+  }
+}