3.3.0 / 2015-09-08

This release adds some new assertions and fixes some quite important, long standing bugs. Here are the cliff notes:

• Bugfix: Property assertions that fail now show a stack trace!
• Bugfix: If you've used the frozen, sealed or extensible assertions to test primitives (e.g. expect(1).to.be.frozen), you may have noticed that in older browsers (ES5) these fail, and in new ones (ES6) they pass. They have now been fixed to consistently pass
• The assert interface has been given the following new methods, to align better with other interfaces:, assert.isAtMost, assert.isAtLeast, assert.isNotTrue, assert.isNotFalse.

Community Contributions

Code Features & Fixes

• #494 Add assert.isNotTrue and assert.isNotFalse.
  By @cezarykluczynski
• #496 frozen/extensible/sealed assertions behave the same in ES6 and ES5 environments.
  By @astorije
• #499 Simplify the .empty assertion.
  By @Daveloper87
• #500 Add assert.isAtMost and assert.isAtLeast.
  By @wraithan
• #512 fixed expect('').to.contain('') so it passes. By @dereke
• #514 Fix stack trace tracking for property assertions.
  By @kpdecker

Documentation fixes

• #495 Correct misplaced docs for assertions (isBelow, isAbove, isTrue).
  By @cezarykluczynski