- Add getters for the current packageRoot or packageMap.

tests/standalone/full_coverage_test.dart

Index: tests/standalone/full_coverage_test.dart
diff --git a/tests/standalone/full_coverage_test.dart b/tests/standalone/full_coverage_test.dart
index 9eab81d766886ea63d0a4205731d77116e825a15..7a3ebd341ecc284c6acd4688d8f1ca13cfe40072 100644
--- a/tests/standalone/full_coverage_test.dart
+++ b/tests/standalone/full_coverage_test.dart
@@ -15,7 +15,7 @@ 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
@@ -210,9 +210,11 @@ testCoverage(String programDir, String programPath, descriptor,
 }
 
 
-main() {
+main() async {
   String testingDirectory;
 
+  packageRoot = (await Platform.packageRoot).toFilePath();
+
   setUp(() {
     testingDirectory = prepareEnv();
   });