This class multiplexes communication over a single underlying channel.
It will be useful for communicating individually with test suites and
tests over the server  browser WebSocket connection.

See #5

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//957583002

This creates the following four subdirectories:

* `frontend/`, which is for user-visible libraries exported by
  `lib/unittest.dart`.

* `backend/`, which is for libraries that define the internal
  structure of test suites and how they're run in a platform-
  independent manner.

* `runner/`, which is for libraries that are specifically useful for
  the test runner. This includes code that deals with multiple test
  suites at once as well as platform-specific test running code.

* `util/`, which contains various utility libraries that aren't
  specific to unittest's use-case. Individual utility functions can
  still go in `lib/util.dart`.

* `deprecated/`, which contains deprecated libraries.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//955543002

R=nweiz@google.com

Review URL: https://codereview.chromium.org//958433002

R=kevmoo@google.com
Closes #20

Review URL: https://codereview.chromium.org//948113004

R=nweiz@google.com

Review URL: https://codereview.chromium.org//939303003

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//945583003

This will help make a better first impression.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//939383002

The biggest issue was issue 6610 causing [Isolate.spawn] to fail in
child isolates.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//941123002

This preserves the shape of the previous API, but stubs out the functionality.
This is a temporary measure designed to make it easier for users to try the
runner out on their existing tests.

R=kevmoo@google.com
Closes #2

Review URL: https://codereview.chromium.org//934413002

This ensures that console_reporter_test isn't run on browsers, and
improves the path detection for test/io.dart.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//944553002

This is still extremely bare-bones and won't work with tests that actually
import "package:unittest/unittest.dart", but it's something.

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//933083002

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//936693002

R=nweiz@google.com

Review URL: https://codereview.chromium.org//926063003

Remove the "build/" prefix from a bunch of status lines, add a missing
import to test/io.dart, and use SkipByDesign everywhere.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//923803002

Run tests from test/ rather than build/test so that their assumptions
about paths hold true, fix a typo in the vm_listener_test line, and
mark prints_matcher_test failing on Safari.

R=kevmoo@google.com
TBR
See #4

Review URL: https://codereview.chromium.org//917353003

This fixes tests that don't require dart:io and marks those that do
dart:io as Skip.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//918853005

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//920703006

This also adds LiveTest.close, which releases resources associated with a
LiveTest.

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//914963003

No tests yet; since this uses stdout, I'm planning to wait until we have a
runner executable and test that.

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//913123006

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//891493004

These provide the core test-declaration API.

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//917783003

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//916533003

R=nweiz@google.com

Review URL: https://codereview.chromium.org//916653002

R=nweiz@google.com

Review URL: https://codereview.chromium.org//917503002

R=nweiz@google.com

Review URL: https://codereview.chromium.org//909323002

R=nweiz@google.com

Review URL: https://codereview.chromium.org//916523002

Review URL: https://codereview.chromium.org//910943002

So far these interfaces don't really do anything, so there aren't any tests.
Future commits will use these as a foundation.

R=kevmoo@google.com
See #2

Review URL: https://codereview.chromium.org//877553009

This gets rid of all uses of part, adds documentation where it was missing, and
fixes a number of style issues. It's a backwards-compatible change designed to
make the package more clear and comprehensible in preparation for larger
changes to come.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//869043002

R=nweiz@google.com

Review URL: https://codereview.chromium.org//882843003

R=nweiz@google.com

Review URL: https://codereview.chromium.org//873473004

R=nweiz@google.com

Review URL: https://codereview.chromium.org//876343003

R=nweiz@google.com

Review URL: https://codereview.chromium.org//869053002

also removed unused fields and variables

R=nweiz@google.com

Review URL: https://codereview.chromium.org//845153003

R=nweiz@google.com

Review URL: https://codereview.chromium.org//850603002

also updated codereview url

R=nweiz@google.com

Review URL: https://codereview.chromium.org//846143003