- Add getters for the current packageRoot or packageMap.

tests/standalone/full_coverage_test.dart

 // Copyright (c) 2014, 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.
 
 // These tests fork a second VM process that runs the script
 // ``tools/full-coverage.dart'' and verifies that the tool
 // produces the expeced output.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 final String coverageScript =
     Platform.script.resolve('../../tools/full-coverage.dart').toFilePath();
-final String packageRoot = Platform.packageRoot;
+String packageRoot;
 final List dartBaseArgs = ['--package-root=${packageRoot}', '--checked',];
 
 // With line numbers starting at 0, the list of hits can be understood as
 // follows:
 // * -1: No coverage data on this line.
 // *  0: No hits on this line.
 // *  1: ``Some'' hits on this line.
 final coverageTests = [
   {
     'name': 'faculty',
@@ skipping 174 matching lines @@
         expect(e, expectedHitMap.removeAt(0));
       });
       // Make sure that there are only lines left that do not contain coverage
       // data.
       expectedHitMap.forEach((e) => expect(e, -1));
     }), completes);
   }), completes);
 }
 
 
-main() {
+main() async {
   String testingDirectory;
 
+  packageRoot = (await Platform.packageRoot).toFilePath();
+
   setUp(() {
     testingDirectory = prepareEnv();
   });
 
   tearDown(() => destroyEnv(testingDirectory));
 
   test('CoverageTests', () {
     generateCoverage(testingDirectory);
 
     coverageTests.forEach((cTest) {
       String programDir = path.join(testingDirectory, cTest['name']);
       String programPath = path.join(programDir, "${cTest['name']}.dart");
       testCoverage(programDir, programPath,
                    new LcovDescriptor(programPath),
                    new List.from(cTest['expectedHits']));
       testCoverage(programDir, programPath,
                    new PrettyPrintDescriptor(programPath),
                    new List.from(cTest['expectedHits']));
     });
   });
 }