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

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

Index: sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart
diff --git a/sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart b/sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f25d4768d781664f257b6a2833da4c626a3e61a6
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/snapshot/upgrades_snapshot_for_dependency_test.dart
@@ -0,0 +1,55 @@
+// 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("upgrades a snapshot when a dependency is upgraded", () {
+    servePackages([
+      packageMap("foo", "1.2.3", {"bar": "any"}),
+      packageMap("bar", "1.2.3")
+    ], contents: [
+      d.dir("lib", [d.file("bar.dart", "final message = 'hello!';")]),
+      d.dir("bin", [
+        d.file("hello.dart", """
+import 'package:bar/bar.dart';
+
+void main() => print(message);
+""")
+      ])
+    ]);
+
+    d.appDir({"foo": "any"}).create();
+
+    pubGet(output: contains("Precompiled foo:hello."));
+
+    d.dir(p.join(appPath, '.pub', 'bin', 'foo'), [
+      d.matcherFile('hello.dart.snapshot', contains('hello!'))
+    ]).validate();
+
+    servePackages([
+      packageMap("foo", "1.2.3", {"bar": "any"}),
+      packageMap("bar", "1.2.4")
+    ], contents: [
+      d.dir("lib", [d.file("bar.dart", "final message = 'hello 2!';")]),
+    ], replace: true);
+
+    pubUpgrade(output: contains("Precompiled foo:hello."));
+
+    d.dir(p.join(appPath, '.pub', 'bin', 'foo'), [
+      d.matcherFile('hello.dart.snapshot', contains('hello 2!'))
+    ]).validate();
+
+    var process = pubRun(args: ['foo:hello']);
+    process.stdout.expect("hello 2!");
+    process.shouldExit();
+  });
+}