Fix error reporting on invalid command line args.

utils/tests/pub/pub_test.dart

 // Copyright (c) 2012, 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 'dart:io';
 
 import 'test_pub.dart';
 import '../../../pkg/unittest/lib/unittest.dart';
 
 final USAGE_STRING = """
     Pub is a package manager for Dart.
 
     Usage: pub command [arguments]
 
     Global options:
     -h, --help          Prints this usage information
         --version       Prints the version of Pub
         --[no-]trace    Prints a stack trace when an error occurs
 
-    The commands are:
+    Available commands:
       help      display help information for Pub
       install   install the current package's dependencies
       update    update the current package's dependencies to the latest versions
       version   print Pub version
 
     Use "pub help [command]" for more information about a command.
     """;
 
 final VERSION_STRING = '''
     Pub 0.0.0
     ''';
 
 main() {
   test('running pub with no command displays usage', () =>
       runPub(args: [], output: USAGE_STRING));
 
   test('running pub with just --help displays usage', () =>
       runPub(args: ['--help'], output: USAGE_STRING));
 
   test('running pub with just -h displays usage', () =>
       runPub(args: ['-h'], output: USAGE_STRING));
 
   test('running pub with just --version displays version', () =>
       runPub(args: ['--version'], output: VERSION_STRING));
 
-  group('an unknown command', () {
-    test('displays an error message', () {
-      runPub(args: ['quylthulg'],
-          error: '''
-          Unknown command "quylthulg".
-          Run "pub help" to see available commands.
-          ''',
-          exitCode: 64);
-    });
+  test('an unknown command displays an error message', () {
+    runPub(args: ['quylthulg'],
+        error: '''
+        Could not find a command named "quylthulg".
+        Run "pub help" to see available commands.
+        ''',
+        exitCode: 64);
+  });
+
+  test('an unknown option displays an error message', () {
+    runPub(args: ['--blorf'],
+        error: '''
+        Could not find an option named "blorf".
+        Run "pub help" to see available options.
+        ''',
+        exitCode: 64);
+  });
+
+  test('an unknown command option displays an error message', () {
+    // TODO(rnystrom): When pub has command-specific options, a more precise
+    // error message would be good here.
+    runPub(args: ['version', '--blorf'],
+        error: '''
+        Could not find an option named "blorf".
+        Use "pub help" for more information.
+        ''',
+        exitCode: 64);
+  });
+
+  test('an unknown help command displays an error message', () {
+    runPub(args: ['help', 'quylthulg'],
+        error: '''
+        Could not find a command named "quylthulg".
+        Run "pub help" to see available commands.
+        ''',
+        exitCode: 64);
   });
 
   test('displays the current version', () =>
     runPub(args: ['version'], output: VERSION_STRING));
 }