Support running executables from dependencies.

sdk/lib/_internal/pub/test/run/runs_named_app_in_dev_dependency_test.dart

Index: sdk/lib/_internal/pub/test/run/runs_named_app_in_dev_dependency_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/passes_along_arguments_test.dart b/sdk/lib/_internal/pub/test/run/runs_named_app_in_dev_dependency_test.dart
similarity index 50%
copy from sdk/lib/_internal/pub/test/run/passes_along_arguments_test.dart
copy to sdk/lib/_internal/pub/test/run/runs_named_app_in_dev_dependency_test.dart
index 888319e4358739c7fc13d653fba1f1abbb84e195..65c75b966bb857ef493ad57cad54b284fabcf08f 100644
--- a/sdk/lib/_internal/pub/test/run/passes_along_arguments_test.dart
+++ b/sdk/lib/_internal/pub/test/run/runs_named_app_in_dev_dependency_test.dart
@@ -6,27 +6,29 @@ import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
 
-const SCRIPT = """
-main(List<String> args) {
-  print(args.join(" "));
-}
-""";
-
 main() {
   initConfig();
-  integration('passes arguments to the spawned script', () {
-    d.dir(appPath, [
-      d.appPubspec(),
+  integration('runs a named Dart application in a dev dependency', () {
+    d.dir("foo", [
+      d.libPubspec("foo", "1.0.0"),
       d.dir("bin", [
-        d.file("args.dart", SCRIPT)
+        d.file("bar.dart", "main() => print('foobar');")
       ])
     ]).create();
 
-    // Use some args that would trip up pub's arg parser to ensure that it
-    // isn't trying to look at them.
-    var pub = pubRun(args: ["args", "--verbose", "-m", "--", "help"]);
+    d.dir(appPath, [
+      d.pubspec({
+        "name": "myapp",
+        "dev_dependencies": {
+          "foo": {"path": "../foo"}
+        }
+      })
+    ]).create();
+
+    pubGet();
 
-    pub.stdout.expect("--verbose -m -- help");
+    var pub = pubRun(args: ["foo:bar"]);
+    pub.stdout.expect("foobar");
     pub.shouldExit();
   });
 }