pkg/unittest: Add a server for serving test assets to browsers.

Add a server for serving test assets to browsers.

See #5

R=kevmoo@google.com

Committed: https://github.com/dart-lang/unittest/commit/054c68148ca869efcdcbe5f2c99b99e72e1d7ce3

[kevmoo, 2015-03-04 20:30:38]

In unchecked mode I get 1 failure (once the call to libDir() is fixed)

00:00 +0 -1: .loadFile() returns a suite with a name matching the file path
  FileSystemException: Cannot open file, path = './version' (OS Error: No such
file or directory, errno = 2)
  package:unittest                    Loader.close
  test/runner/loader_test.dart 38:25  main.<fn>

In checked mode, i get 7 failures, the one above and 

00:00 +0 -2: .loadFile() returns tests with the correct names
  Failed assertion: boolean expression must not be null
  package:unittest                    Loader.close
  test/runner/loader_test.dart 38:25  main.<fn>

https://codereview.chromium.org/979513002/diff/40001/lib/src/runner/browser/s...
File lib/src/runner/browser/server.dart (right):

https://codereview.chromium.org/979513002/diff/40001/lib/src/runner/browser/s...
lib/src/runner/browser/server.dart:99: .add(createStaticHandler(p.join(libDir,
'src/runner/browser/static'),
Call the method - libDir()

[nweiz, 2015-03-04 21:41:13]

I can't reproduce your test failures in checked or unchecked mode.

[kevmoo, 2015-03-04 23:41:04]

lgtm

https://codereview.chromium.org/979513002/diff/60001/lib/src/runner/loader.dart
File lib/src/runner/loader.dart (right):

https://codereview.chromium.org/979513002/diff/60001/lib/src/runner/loader.da...
lib/src/runner/loader.dart:15: import '../util/io.dart';
unused import

[nweiz, 2015-03-05 01:08:02]

https://codereview.chromium.org/979513002/diff/60001/lib/src/runner/loader.dart
File lib/src/runner/loader.dart (right):

https://codereview.chromium.org/979513002/diff/60001/lib/src/runner/loader.da...
lib/src/runner/loader.dart:15: import '../util/io.dart';
On 2015/03/04 23:41:04, kevmoo wrote:
> unused import

This is needed for [packageRootFor].

[nweiz, 2015-03-05 01:08:14]

Committed patchset #4 (id:60001) manually as
054c68148ca869efcdcbe5f2c99b99e72e1d7ce3 (presubmit successful).