Index: pkg/front_end/lib/memory_file_system.dart |
diff --git a/pkg/front_end/lib/memory_file_system.dart b/pkg/front_end/lib/memory_file_system.dart |
index e7382adfb38a38d51b534894d9c7ce6de27d1a25..6c57167a87d45e1620fadab02a82fe585658256d 100644 |
--- a/pkg/front_end/lib/memory_file_system.dart |
+++ b/pkg/front_end/lib/memory_file_system.dart |
@@ -8,8 +8,6 @@ import 'dart:async'; |
import 'dart:convert'; |
import 'dart:typed_data'; |
-import 'package:path/path.dart' as p; |
- |
import 'file_system.dart'; |
/// Concrete implementation of [FileSystem] which performs its operations on an |
@@ -17,10 +15,13 @@ import 'file_system.dart'; |
/// |
/// Not intended to be implemented or extended by clients. |
class MemoryFileSystem implements FileSystem { |
- @override |
- final p.Context context; |
- |
final Map<Uri, Uint8List> _files = {}; |
+ final Map<Uri, DateTime> _lastModified = {}; |
+ |
+ // Counter used to create mock last-modification timestamps. The memory |
+ // file-system is mainly used for testing, so we use mock timestamps to avoid |
+ // introducing non-determinism. |
+ int _lastUpdate = 0; |
/// The "current directory" in the in-memory virtual file system. |
/// |
@@ -29,7 +30,7 @@ class MemoryFileSystem implements FileSystem { |
/// Always ends in a trailing '/'. |
Uri currentDirectory; |
- MemoryFileSystem(this.context, Uri currentDirectory) |
+ MemoryFileSystem(Uri currentDirectory) |
: currentDirectory = _addTrailingSlash(currentDirectory); |
@override |
@@ -80,12 +81,24 @@ class MemoryFileSystemEntity implements FileSystemEntity { |
return UTF8.decode(contents); |
} |
+ @override |
+ Future<bool> exists() async => _fileSystem._files[uri] != null; |
+ |
+ @override |
+ Future<DateTime> lastModified() async { |
+ var lastModified = _fileSystem._lastModified[uri]; |
+ if (lastModified == null) { |
+ throw new Exception('File does not exist'); |
+ } |
+ return lastModified; |
+ } |
+ |
/// Writes the given raw bytes to this file system entity. |
/// |
/// If no file exists, one is created. If a file exists already, it is |
/// overwritten. |
void writeAsBytesSync(List<int> bytes) { |
- _fileSystem._files[uri] = new Uint8List.fromList(bytes); |
+ _update(uri, new Uint8List.fromList(bytes)); |
} |
/// Writes the given string to this file system entity. |
@@ -98,6 +111,12 @@ class MemoryFileSystemEntity implements FileSystemEntity { |
// Note: the return type of UTF8.encode is List<int>, but in practice it |
// always returns Uint8List. We rely on that for efficiency, so that we |
// don't have to make an extra copy. |
- _fileSystem._files[uri] = UTF8.encode(s) as Uint8List; |
+ _update(uri, UTF8.encode(s) as Uint8List); |
+ } |
+ |
+ void _update(Uri uri, Uint8List data) { |
+ _fileSystem._files[uri] = data; |
+ _fileSystem._lastModified[uri] = |
+ new DateTime.fromMicrosecondsSinceEpoch(++_fileSystem._lastUpdate); |
} |
} |