Make pub's binstubs resilient to changes in snapshot format.

sdk/lib/_internal/pub/test/global/binstubs/outdated_binstub_runs_pub_global_test.dart

Index: sdk/lib/_internal/pub/test/global/binstubs/outdated_binstub_runs_pub_global_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/run/recompiles_if_sdk_is_out_of_date_test.dart b/sdk/lib/_internal/pub/test/global/binstubs/outdated_binstub_runs_pub_global_test.dart
similarity index 55%
copy from sdk/lib/_internal/pub/test/global/run/recompiles_if_sdk_is_out_of_date_test.dart
copy to sdk/lib/_internal/pub/test/global/binstubs/outdated_binstub_runs_pub_global_test.dart
index bb38dd7da86f347c34ce99d304acf244376f4590..e2f276d1cea3329240aa81101b0c18edf46b1967 100644
--- a/sdk/lib/_internal/pub/test/global/run/recompiles_if_sdk_is_out_of_date_test.dart
+++ b/sdk/lib/_internal/pub/test/global/binstubs/outdated_binstub_runs_pub_global_test.dart
@@ -2,17 +2,26 @@
 // 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 'package:path/path.dart' as p;
+import 'package:scheduled_test/scheduled_process.dart';
 import 'package:scheduled_test/scheduled_stream.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
+import 'utils.dart';
 
 main() {
   initConfig();
-  integration('recompiles a script if the SDK version is out-of-date', () {
+  integration("an outdated binstub runs 'pub global run'", () {
     servePackages((builder) {
-      builder.serve("foo", "1.0.0", contents: [
+      builder.serve("foo", "1.0.0", pubspec: {
+        "executables": {
+          "foo-script": "script"
+        }
+      }, contents: [
         d.dir("bin", [
           d.file("script.dart", "main(args) => print('ok');")
         ])
@@ -29,21 +38,12 @@ main() {
       ])
     ]).create();
 
-    var pub = pubRun(global: true, args: ["foo:script"]);
-    // In the real world this would just print "hello!", but since we collect
-    // all output we see the precompilation messages as well.
-    pub.stdout.expect("Precompiling executables...");
-    pub.stdout.expect(consumeThrough("ok"));
-    pub.shouldExit();
+    var process = new ScheduledProcess.start(
+        p.join(sandboxDir, cachePath, "bin", binStubName("foo-script")),
+        ["arg1", "arg2"],
+        environment: getEnvironment());
 
-    d.dir(cachePath, [
-      d.dir('global_packages', [
-        d.dir('foo', [
-          d.dir('bin', [
-            d.matcherFile('script.dart.snapshot', contains('ok'))
-          ])
-        ])
-      ])
-    ]).validate();
+    process.stdout.expect(consumeThrough("ok"));
+    process.shouldExit();
   });
 }