Create binstubs for executables when activating a package.

sdk/lib/_internal/pub/test/pubspec_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.
 
 library pubspec_test;
 
 import 'dart:async';
 
 import 'package:unittest/unittest.dart';
 
@@ skipping 426 matching lines @@
 publish_to: none
 ''', sources);
         expect(pubspec.publishTo, equals("none"));
       });
 
       test("throws on other strings", () {
         expectPubspecException('publish_to: http://bad.url:not-port',
             (pubspec) => pubspec.publishTo);
       });
     });
+
+    group("executables", () {
+      test("defaults to an empty map if omitted", () {
+        var pubspec = new Pubspec.parse('', sources);
+        expect(pubspec.executables, isEmpty);
+      });
+
+      test("throws if not a map", () {
+        expectPubspecException('executables: not map',
+            (pubspec) => pubspec.executables);
+      });
+
+      test("throws if key is not a string", () {
+        expectPubspecException('executables: {123: value}',
+            (pubspec) => pubspec.executables);
+      });
+
+      test("throws if a key isn't a simple name", () {
+        expectPubspecException('executables: {funny/name: ok}',
+            (pubspec) => pubspec.executables);
+      });
+
+      test("throws if a value is not a string", () {
+        expectPubspecException('executables: {command: 123}',
+            (pubspec) => pubspec.executables);
+      });
+
+      test("throws if a value isn't a simple name", () {
+        expectPubspecException('executables: {command: funny_name/part}',
+            (pubspec) => pubspec.executables);
+      });
+
+      test("uses the key if the value is null", () {
+        var pubspec = new Pubspec.parse('''
+executables:
+  command:
+''', sources);
+        expect(pubspec.executables['command'], equals('command'));
+      });
+    });
   });
 }