Make the values of Platform.executable and Platform.script available to all isolates

tests/standalone/io/platform_test.dart

 // Copyright (c) 2012, 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 "package:expect/expect.dart";
+import "dart:async";
 import "dart:io";
+import "dart:isolate";
 
-main() {
+test() {
   Expect.isTrue(Platform.numberOfProcessors > 0);
   var os = Platform.operatingSystem;
   Expect.isTrue(os == "android" || os == "linux" || os == "macos" ||
       os == "windows");
   Expect.equals(Platform.isLinux, Platform.operatingSystem == "linux");
   Expect.equals(Platform.isMacOS, Platform.operatingSystem == "macos");
   Expect.equals(Platform.isWindows, Platform.operatingSystem == "windows");
   Expect.equals(Platform.isAndroid, Platform.operatingSystem == "android");
   var sep = Platform.pathSeparator;
   Expect.isTrue(sep == '/' || (os == 'windows' && sep == '\\'));
   var hostname = Platform.localHostname;
   Expect.isTrue(hostname is String && hostname != "");
   var environment = Platform.environment;
   Expect.isTrue(environment is Map<String, String>);
   Expect.isTrue(Platform.executable.contains('dart'));
   Expect.isTrue(Platform.script.replaceAll('\\', '/').
                 endsWith('tests/standalone/io/platform_test.dart'));
 }
+
+void f() {
+  port.receive((msg, reply) {
+    if (msg == "Platform.executable") {
+      reply.send(Platform.executable);
+    }
+    if (msg == "Platform.script") {
+      reply.send(Platform.script);
+    }
+    if (msg == "new Options().executable") {
+      reply.send(new Options().executable);
+    }
+    if (msg == "new Options().script") {
+      reply.send(new Options().script);
+    }
+    if (msg == "close") {
+      reply.send("closed");
+      port.close();
+    }
+  });
+}
+
+testIsolate() {
+  var port = new ReceivePort();
+  var sendPort = spawnFunction(f);
+  Future.wait([sendPort.call("Platform.executable"),
+               sendPort.call("Platform.script"),
+               sendPort.call("new Options().executable"),
+               sendPort.call("new Options().script")])
+  .then((results) {
+    Expect.equals(Platform.executable, results[0]);
+    Expect.equals(Platform.executable, results[2]);
+    Uri uri = Uri.parse(results[1]);
+    Expect.equals(uri, Uri.parse(results[3]));
+    Expect.equals("file", uri.scheme);
+    Expect.isTrue(uri.path.endsWith('tests/standalone/io/platform_test.dart'));
+    sendPort.call("close").then((_) => port.close());
+  });
+}
+
+main() {
+  test();
+  testIsolate();
+}