Forward signals to pub run processes.

sdk/lib/_internal/pub/test/run/forwards_signal_windows_test.dart

Index: sdk/lib/_internal/pub/test/run/forwards_signal_windows_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_test.dart b/sdk/lib/_internal/pub/test/run/forwards_signal_windows_test.dart
similarity index 51%
copy from sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_test.dart
copy to sdk/lib/_internal/pub/test/run/forwards_signal_windows_test.dart
index e3cb233f8634b569adf10d2b57c82f082ae93fa2..d9cada025e70471d54e66c388ab0958d166a7955 100644
--- a/sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_test.dart
+++ b/sdk/lib/_internal/pub/test/run/forwards_signal_windows_test.dart
@@ -1,7 +1,9 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
+import 'dart:io';
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
@@ -9,15 +11,16 @@ const SCRIPT = """
 import 'dart:io';
 
 main() {
-  stdout.writeln("stdout output");
-  stderr.writeln("stderr output");
-  exitCode = 123;
+  ProcessSignal.SIGHUP.watch().listen(print);
+  ProcessSignal.SIGINT.watch().listen(print);
+
+  print("ready");
 }
 """;
 
 main() {
   initConfig();
-  integration('runs a Dart application in the entrypoint package', () {
+  integration('forwards signals to the inner script', () {
     d.dir(appPath, [
       d.appPubspec(),
       d.dir("bin", [
@@ -26,8 +29,13 @@ main() {
     ]).create();
 
     var pub = pubRun(args: ["script"]);
-    pub.stdout.expect("stdout output");
-    pub.stderr.expect("stderr output");
-    pub.shouldExit(123);
+
+    pub.stdout.expect("ready");
+    for (var signal in [ProcessSignal.SIGHUP, ProcessSignal.SIGINT]) {
+      pub.signal(signal);
+      pub.stdout.expect(signal.toString());
+    }
+
+    pub.kill();
   });
 }