Rationalize arg handling for pub build and serve.

sdk/lib/_internal/pub/test/build/compiles_entrypoints_in_root_package_test.dart

Index: sdk/lib/_internal/pub/test/build/compiles_entrypoints_in_root_package_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/compiles_entrypoints_in_root_package_test.dart b/sdk/lib/_internal/pub/test/build/compiles_entrypoints_in_root_package_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..d5f1fc55ed481147ed06de8f86ca8ed701d68d06
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/build/compiles_entrypoints_in_root_package_test.dart
@@ -0,0 +1,84 @@
+// 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:scheduled_test/scheduled_test.dart';
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+
+main() {
+  initConfig();
+
+  integration("compiles Dart entrypoints in root package to JS", () {
+    // Dart2js can take a long time to compile dart code, so we increase the
+    // timeout to cope with that.
+    currentSchedule.timeout *= 3;
+
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('benchmark', [
+        d.file('file.dart', 'void main() => print("hello");'),
+        d.file('lib.dart', 'void foo() => print("hello");'),
+        d.dir('subdir', [
+          d.file('subfile.dart', 'void main() => print("ping");')
+        ])
+      ]),
+      d.dir('foo', [
+        d.file('file.dart', 'void main() => print("hello");'),
+        d.file('lib.dart', 'void foo() => print("hello");'),
+        d.dir('subdir', [
+          d.file('subfile.dart', 'void main() => print("ping");')
+        ])
+      ]),
+      d.dir('web', [
+        d.file('file.dart', 'void main() => print("hello");'),
+        d.file('lib.dart', 'void foo() => print("hello");'),
+        d.dir('subdir', [
+          d.file('subfile.dart', 'void main() => print("ping");')
+        ])
+      ])
+    ]).create();
+
+    schedulePub(args: ["build", "benchmark", "foo", "web"],
+        output: new RegExp(r'Built 12 files to "build".'));
+
+    d.dir(appPath, [
+      d.dir('build', [
+        d.dir('benchmark', [
+          d.matcherFile('file.dart.js', isNot(isEmpty)),
+          d.matcherFile('file.dart.precompiled.js', isNot(isEmpty)),
+          d.nothing('file.dart'),
+          d.nothing('lib.dart'),
+          d.dir('subdir', [
+            d.matcherFile('subfile.dart.js', isNot(isEmpty)),
+            d.matcherFile('subfile.dart.precompiled.js', isNot(isEmpty)),
+            d.nothing('subfile.dart')
+          ])
+        ]),
+        d.dir('foo', [
+          d.matcherFile('file.dart.js', isNot(isEmpty)),
+          d.matcherFile('file.dart.precompiled.js', isNot(isEmpty)),
+          d.nothing('file.dart'),
+          d.nothing('lib.dart'),
+          d.dir('subdir', [
+            d.matcherFile('subfile.dart.js', isNot(isEmpty)),
+            d.matcherFile('subfile.dart.precompiled.js', isNot(isEmpty)),
+            d.nothing('subfile.dart')
+          ])
+        ]),
+        d.dir('web', [
+          d.matcherFile('file.dart.js', isNot(isEmpty)),
+          d.matcherFile('file.dart.precompiled.js', isNot(isEmpty)),
+          d.nothing('file.dart'),
+          d.nothing('lib.dart'),
+          d.dir('subdir', [
+            d.matcherFile('subfile.dart.js', isNot(isEmpty)),
+            d.matcherFile('subfile.dart.precompiled.js', isNot(isEmpty)),
+            d.nothing('subfile.dart')
+          ])
+        ])
+      ])
+    ]).validate();
+  });
+}