upgrade dependencies, including migration to package:test

test/end_to_end_test.dart

 // Copyright (c) 2015, 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.
 
 /// Tests that run the checker end-to-end using the file system, but with a mock
 /// SDK.
 library dev_compiler.test.end_to_end;
 
-import 'dart:io';
 import 'package:dev_compiler/devc.dart' show Compiler;
 import 'package:dev_compiler/src/options.dart';
-import 'package:dev_compiler/src/report.dart';
-import 'package:path/path.dart' as path;
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
+import 'test_util.dart' show testDirectory;
 
 main() {
-  var testDir = path.absolute(path.dirname(Platform.script.path));
-  _check(testfile) {
+  _check(testFile) {
     var options = new CompilerOptions(
-        entryPointFile: '$testDir/$testfile.dart', useMockSdk: true);
+        entryPointFile: '$testDirectory/$testFile.dart', useMockSdk: true);
     new Compiler(options).run();
   }
 
   test('checker runs correctly (end-to-end)', () {
     _check('samples/funwithtypes');
   });
 
   test('checker accepts files with imports', () {
     _check('samples/import_test');
   });
 
   test('checker tests function types', () {
     // TODO(vsm): Check for correct down casts.
     _check('samples/function_type_test');
   });
 
   test('checker tests runtime checks', () {
     // TODO(sigmund,vsm): Check output for invalid checks.
     _check('samples/runtimetypechecktest');
   });
 
   test('checker tests return values', () {
     // TODO(vsm): Check for conversions.
     _check('samples/return_test');
   });
 }