More fixes for failures on the Windows bot

pkg/analyzer/test/utils.dart

 // 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 utils;
+library analyzer.test.utils;
 
-import 'dart:io';
+import 'package:analyzer/src/generated/java_io.dart';
+import 'package:path/path.dart' as path;
+import 'package:unittest/unittest.dart';
 
-import 'package:analyzer/analyzer.dart';
-import 'package:path/path.dart' as pathos;
-
-/// Returns the string representation of the [AnalyzerErrorGroup] thrown when
-/// parsing [contents] as a Dart file. If [contents] doesn't throw any errors,
-/// this will return null.
-///
-/// This replaces the filename in the error string with its basename, since the
-/// full path will vary from machine to machine. It also replaces the exception
-/// message with "..." to decouple these tests from the specific exception
-/// messages.
-String errorsForFile(String contents) {
-  return withTempDir((temp) {
-    var path = pathos.join(temp, 'test.dart');
-    new File(path).writeAsStringSync(contents);
-    try {
-      parseDartFile(path);
-    } on AnalyzerErrorGroup catch (e) {
-      return e.toString().replaceAllMapped(new RegExp(
-              r"^(Error on line \d+ of )((?:[A-Z]+:)?[^:]+): .*$",
-              multiLine: true),
-          (match) => match[1] + pathos.basename(match[2]) + ': ...');
-    }
-    return null;
-  });
+void initializeTestEnvironment() {
+  groupSep = ' | ';
+  JavaFile.pathContext = path.posix;
 }
-
-/// Creates a temporary directory and passes its path to [fn]. Once [fn]
-/// completes, the temporary directory and all its contents will be deleted.
-///
-/// Returns the return value of [fn].
-dynamic withTempDir(fn(String path)) {
-  var tempDir = Directory.systemTemp.createTempSync('analyzer_').path;
-  try {
-    return fn(tempDir);
-  } finally {
-    new Directory(tempDir).deleteSync(recursive: true);
-  }
-}