| // Copyright (c) 2013, 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 descriptor.file; |
| |
| import 'dart:async'; |
| import 'dart:io'; |
| import 'dart:math' as math; |
| import 'dart:utf'; |
| |
| import '../../../../../pkg/pathos/lib/path.dart' as path; |
| |
| import '../../descriptor.dart'; |
| import '../../scheduled_test.dart'; |
| import '../utils.dart'; |
| |
| /// A descriptor describing a single file. |
| class FileDescriptor extends Descriptor { |
| /// Whether this descriptor describes a binary file. This is only used when |
| /// displaying error messages. |
| final bool isBinary; |
| |
| /// The contents of the file, in bytes. |
| final List<int> contents; |
| |
| /// The contents of the file as a String. Assumes UTF-8 encoding. |
| String get textContents => new String.fromCharCodes(contents); |
| |
| FileDescriptor.binary(String name, List<int> contents) |
| : this._(name, contents, true); |
| |
| FileDescriptor(String name, String contents) |
| : this._(name, encodeUtf8(contents), false); |
| |
| FileDescriptor._(String name, this.contents, this.isBinary) |
| : super(name); |
| |
| Future create([String parent]) => schedule(() { |
| if (parent == null) parent = defaultRoot; |
| return new File(path.join(parent, name)).writeAsBytes(contents); |
| }, "creating file '$name'"); |
| |
| Future validate([String parent]) => |
| schedule(() => validateNow(parent), "validating file '$name'"); |
| |
| Future validateNow([String parent]) { |
| if (parent == null) parent = defaultRoot; |
| var fullPath = path.join(parent, name); |
| if (!new File(fullPath).existsSync()) { |
| throw "File not found: '$fullPath'."; |
| } |
| |
| return new File(fullPath).readAsBytes() |
| .then((actualContents) { |
| if (orderedIterableEquals(contents, actualContents)) return; |
| if (isBinary) { |
| // TODO(nweiz): show a hex dump here if the data is small enough. |
| throw "File '$name' didn't contain the expected binary data."; |
| } |
| throw _textMismatchMessage(textContents, |
| new String.fromCharCodes(actualContents)); |
| }); |
| } |
| |
| Stream<List<int>> read() => new Future.immediate(contents).asStream(); |
| |
| String describe() => name; |
| |
| String _textMismatchMessage(String expected, String actual) { |
| final expectedLines = expected.split('\n'); |
| final actualLines = actual.split('\n'); |
| |
| var results = []; |
| |
| // Compare them line by line to see which ones match. |
| var length = math.max(expectedLines.length, actualLines.length); |
| for (var i = 0; i < length; i++) { |
| if (i >= actualLines.length) { |
| // Missing output. |
| results.add('? ${expectedLines[i]}'); |
| } else if (i >= expectedLines.length) { |
| // Unexpected extra output. |
| results.add('X ${actualLines[i]}'); |
| } else { |
| var expectedLine = expectedLines[i]; |
| var actualLine = actualLines[i]; |
| |
| if (expectedLine != actualLine) { |
| // Mismatched lines. |
| results.add('X $actualLine'); |
| } else { |
| // Matched lines. |
| results.add('| $actualLine'); |
| } |
| } |
| } |
| |
| return "File '$name' should contain:\n" |
| "${prefixLines(expected)}\n" |
| "but actually contained:\n" |
| "${results.join('\n')}"; |
| } |
| } |