Make test.dart use the path of the running script to find the Dart checkout.

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
diff --git a/tools/testing/dart/test_suite.dart b/tools/testing/dart/test_suite.dart
index 19c838ea976cfdad44aa08bdc968f8836f031461..a163414ec1b2f5a6880a42f68e0b454e1f22241a 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -989,15 +989,9 @@ class TestUtils {
 
   static String dartDir() {
     Directory dart;

[antonm, 2012/01/31 16:21:38]

do you need this line at all?

[Bill Hesse, 2012/02/01 11:48:34]

no.
On 2012/01/31 16:21:38, antonm wrote:

-    if (new File('tools/testing/dart/test_suite.dart').existsSync()) {
-      return new File('.').fullPathSync().replaceAll('\\', '/');
-    } else if (new File('../tools/testing/dart/test_suite.dart').existsSync()) {
-      return new File('..').fullPathSync().replaceAll('\\', '/');
-    } else {
-      print('Run test.dart from the dart directory or' +
-            ' an immediate subdirectory only.');
-      Expect.fail('Could not find top level dart directory.');
-    }
+    String scriptPath = new Options().script.replaceAll('\\', '/');
+    String toolsDir = scriptPath.substring(0, scriptPath.lastIndexOf('/'));
+    return new File('$toolsDir/..').fullPathSync().replaceAll('\\', '/');    
   }
 
   static List<String> standardOptions(Map configuration) {