Rationalize arg handling for pub build and serve.

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

Index: sdk/lib/_internal/pub/test/build/unsupported_build_directories_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/unsupported_build_directories_test.dart b/sdk/lib/_internal/pub/test/build/unsupported_build_directories_test.dart
deleted file mode 100644
index 8ecc742e686637f323c63c60271d8940decc2edd..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/build/unsupported_build_directories_test.dart
+++ /dev/null
@@ -1,45 +0,0 @@
-// 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 '../../lib/src/exit_codes.dart' as exit_codes;
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-
-  integration("fails if given directories are not buildable", () {
-    d.appDir().create();
-
-    schedulePub(args: ["build", "foo", "bar"],
-        error: '''
-            Unsupported build directories "bar" and "foo".
-            The allowed directories are "benchmark", "bin", "example", "test" and "web".
-
-            Usage: pub build [options] [directories...]
-            -h, --help      Print usage information for this command.
-                --format    How output should be displayed.
-                            [text (default), json]
-
-                --mode      Mode to run transformers in.
-                            (defaults to "release")
-
-                --all       Build all buildable directories.''',
-        exitCode: exit_codes.USAGE);
-  });
-
-  integration("fails if given directories are not buildable with json "
-      "output", () {
-    d.appDir().create();
-
-    schedulePub(args: ["build", "foo", "bar", "--format", "json"],
-        outputJson: {
-          "error":
-            'Unsupported build directories "bar" and "foo".\n'
-            'The allowed directories are "benchmark", "bin", "example", '
-                '"test" and "web".'
-        },
-        exitCode: exit_codes.USAGE);
-  });
-}