Create binstubs for executables when activating a package.

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

 // Copyright (c) 2014, 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:path/path.dart' as p;
 import 'package:scheduled_test/scheduled_test.dart';
 
-import '../../../lib/src/io.dart';
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
-  integration('errors if the local package does not exist', () {
+  integration("creates binstubs when activating a path package", () {
     d.dir("foo", [
-      d.libPubspec("foo", "1.0.0"),
+      d.pubspec({
+        "name": "foo",
+        "executables": {
+          "foo": null
+        }
+      }),
       d.dir("bin", [
         d.file("foo.dart", "main() => print('ok');")
       ])
     ]).create();
 
-    schedulePub(args: ["global", "activate", "--source", "path", "../foo"]);
+    schedulePub(args: ["global", "activate", "--source", "path", "../foo"],
+        output: contains("Installed executable foo."));
 
-    schedule(() => deleteEntry(p.join(sandboxDir, "foo")));
-
-    var pub = pubRun(global: true, args: ["foo"]);
-    var path = canonicalize(p.join(sandboxDir, "foo"));
-    pub.stderr.expect('Could not find a file named "pubspec.yaml" in "$path".');
-    pub.shouldExit(1);
+    d.dir(cachePath, [
+      d.dir("bin", [
+        d.matcherFile("foo", contains("pub global run foo:foo"))
+      ])
+    ]).validate();
   });
 }