Rationalize arg handling for pub build and serve.

sdk/lib/_internal/pub/test/barback/all_includes_all_default_directories_test.dart

Index: sdk/lib/_internal/pub/test/barback/all_includes_all_default_directories_test.dart
diff --git a/sdk/lib/_internal/pub/test/barback/all_includes_all_default_directories_test.dart b/sdk/lib/_internal/pub/test/barback/all_includes_all_default_directories_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..bc214e4670f3ece4a330bd7ed91aa609e499dbaa
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/barback/all_includes_all_default_directories_test.dart
@@ -0,0 +1,66 @@
+// 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 '../serve/utils.dart';
+import '../test_pub.dart';
+
+main() {
+  initConfig();
+
+  setUp(() {
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('benchmark', [d.file('file.txt', 'benchmark')]),
+      d.dir('bin',       [d.file('file.txt', 'bin')]),
+      d.dir('example',   [d.file('file.txt', 'example')]),
+      d.dir('test',      [d.file('file.txt', 'test')]),
+      d.dir('web',       [d.file('file.txt', 'web')]),
+      d.dir('unknown',   [d.file('file.txt', 'unknown')])
+    ]).create();
+  });
+
+  integration("build --all finds assets in default source directories", () {
+    schedulePub(args: ["build", "--all"],
+        output: new RegExp(r'Built 5 files to "build".'));
+
+    d.dir(appPath, [
+      d.dir('build', [
+        d.dir('benchmark', [
+          d.file('file.txt', 'benchmark')
+        ]),
+        d.dir('bin', [
+          d.file('file.txt', 'bin')
+        ]),
+        d.dir('example', [
+          d.file('file.txt', 'example')
+        ]),
+        d.dir('test', [
+          d.file('file.txt', 'test')
+        ]),
+        d.dir('web', [
+          d.file('file.txt', 'web')
+        ]),
+        // Only includes default source directories.
+        d.nothing('unknown')
+      ])
+    ]).validate();
+  });
+
+  integration("serve --all finds assets in default source directories", () {
+    pubServe(args: ["--all"]);
+
+    requestShouldSucceed("file.txt", "benchmark", root: "benchmark");
+    requestShouldSucceed("file.txt", "bin", root: "bin");
+    requestShouldSucceed("file.txt", "example", root: "example");
+    requestShouldSucceed("file.txt", "test", root: "test");
+    requestShouldSucceed("file.txt", "web", root: "web");
+
+    expectNotServed("unknown");
+
+    endPubServe();
+  });
+}