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

tests/standalone/io/platform_test.dart

Index: tests/standalone/io/platform_test.dart
diff --git a/tests/standalone/io/platform_test.dart b/tests/standalone/io/platform_test.dart
index ce6e9776c05d769f3d0ac53ef154888a4d5a303e..1677e67ab34cd2f89987b48d31694b396accc00c 100644
--- a/tests/standalone/io/platform_test.dart
+++ b/tests/standalone/io/platform_test.dart
@@ -3,9 +3,11 @@
 // 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" ||
@@ -24,3 +26,47 @@ main() {
   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();
+}