dart-sass/test/utils.dart
2018-11-15 15:16:24 -08:00

34 lines
1.2 KiB
Dart

// Copyright 2018 Google Inc. Use of this source code is governed by an
// MIT-style license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT.
import 'dart:async';
import 'dart:convert';
import 'package:test/test.dart';
import 'package:sass/src/io.dart';
/// A regular expression for matching the URL in a source map comment.
final _sourceMapCommentRegExp = RegExp(r"/\*# sourceMappingURL=(.*) \*/\s*$");
/// Returns a [Future] that waits long enough for modification times to be
/// different.
///
/// Windows (or at least Appveyor) seems to require a more coarse-grained time
/// than Unixes.
Future get tick =>
Future.delayed(Duration(milliseconds: isWindows ? 1000 : 50));
/// Loads and decodes the source map embedded as a `data:` URI in [css].
///
/// Throws a [TestFailure] if [css] doesn't have such a source map.
Map<String, Object> embeddedSourceMap(String css) {
expect(css, matches(_sourceMapCommentRegExp));
var match = _sourceMapCommentRegExp.firstMatch(css);
var data = Uri.parse(match[1]).data;
expect(data.mimeType, equals("application/json"));
return jsonDecode(data.contentAsString()) as Map<String, Object>;
}