Added support for skipping redundant dart2js compilations.

tests/standalone/standalone.status

 # 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.
 
 io/http_basic_test: Pass, Timeout, Fail  # Issue 6393
 
 out_of_memory_test: Skip # Issue 2345
 
 package/invalid_uri_test: Fail, OK # Fails intentionally
 
 [ $runtime == vm && $checked ]
 # These tests have type errors on purpose.
 io/process_invalid_arguments_test: Fail, OK
 io/directory_invalid_arguments_test: Fail, OK
 io/file_invalid_arguments_test: Fail, OK
 io/socket_invalid_arguments_test: Fail, OK
 # These test have type errors on purpose and take very long to run in
 # checked mode with no benefit. Skip.
 io/file_fuzz_test: Skip
 io/directory_fuzz_test: Skip
 
 [ $runtime == vm && $system == linux ]
 io/test_runner_test: Pass, Fail  # Issue 1947
+io/test_skipping_dart2js_compilation__helper: Skip

[ricow1, 2012/11/14 08:53:28]

You should add a comment here as to why we need to skip this, otherwise this is
going to make somebody wonder and spend half an hour at some point

[ahe, 2012/11/14 18:46:16]

This is not necessary.  Only files ending with _test.dart are considered to be
tests.

[kustermann, 2012/11/16 14:58:42]

I'll remove this line. Since the helper dart script doesn't end with
*_test.dart, it's not going to be executed anyway.
On 2012/11/14 08:53:28, ricow1 wrote:

[kustermann, 2012/11/16 14:58:42]

Done.

 
 [ $runtime == vm && $system == macos ]
 # This test fails with "Too many open files" on the Mac OS buildbot.
 # This is expected as MacOS by default runs with a very low number
 # of allowed open files ('ulimit -n' says something like 256).
 io/socket_many_connections_test: Skip
 
 [ $runtime == vm && $system == windows ]
 io/file_system_links_test: Skip  # No links on Windows.
 
@@ skipping 37 matching lines @@
 [ $compiler == dart2js && $browser ]
 *: Skip
 
 [ $compiler == dart2js && $checked ]
 io/http_read_test: Skip # Timeout TODO(ngeoffray): investigate
 io/list_input_stream_test: Skip # Timeout TODO(ngeoffray): investigate
 
 [ $compiler == dart2dart ]
 # Skip until we stabilize language tests.
 *: Skip