Add isNotEmpty to core_matchers.

BUG=https://code.google.com/p/dart/issues/detail?id=21562
R=nweiz@google.com

Review URL: https://codereview.chromium.org//763783003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/matcher@42119 260f80e4-7a28-3924-810f-c04153c831b5
8 files changed
tree: 954b0f63441be1ce02ad63af607990b5e79b0b50
  1. CHANGELOG.md
  2. LICENSE
  3. README.md
  4. lib/
  5. pubspec.yaml
  6. test/
README.md

Support for specifying test expectations, such as for unit tests.

The matcher library provides a third-generation assertion mechanism, drawing inspiration from Hamcrest.

For more information, see Unit Testing with Dart.