Precompile dependencies' executables for use with "pub run".

sdk/lib/_internal/pub/test/snapshot/doesnt_snapshot_an_entrypoint_dependency_test.dart

Index: sdk/lib/_internal/pub/test/snapshot/doesnt_snapshot_an_entrypoint_dependency_test.dart
diff --git a/sdk/lib/_internal/pub/test/snapshot/doesnt_snapshot_an_entrypoint_dependency_test.dart b/sdk/lib/_internal/pub/test/snapshot/doesnt_snapshot_an_entrypoint_dependency_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..164344ced0a00874ba81870fc6e931a269ecbc59
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/snapshot/doesnt_snapshot_an_entrypoint_dependency_test.dart
@@ -0,0 +1,32 @@
+// 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.
+
+library pub_tests;
+
+import 'package:path/path.dart' as p;
+import 'package:scheduled_test/scheduled_test.dart';
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+
+main() {
+  initConfig();
+  integration("doesn't create a snapshot for a package that depends on the "
+      "entrypoint", () {
+    servePackages([
+      packageMap("foo", "1.2.3", {'bar': '1.2.3'}),
+      packageMap("bar", "1.2.3", {'myapp': 'any'})
+    ], contents: [
+      d.dir("bin", [d.file("hello.dart", "void main() => print('hello!');")])
+    ]);
+
+    d.appDir({"foo": "1.2.3"}).create();
+
+    pubGet();
+
+    // No local cache should be created, since all dependencies transitively
+    // depend on the entrypoint.
+    d.nothing(p.join(appPath, '.pub', 'bin')).validate();
+  });
+}