Added assert.notOk()

lib/chai/interface/assert.js

@@ -82,6 +82,24 @@ module.exports = function (chai, util) {
     new Assertion(val, msg).is.ok;
   };
 
+  /**
+   * ### .notOk(object, [message])
+   *
+   * Asserts that `object` is falsy.
+   *
+   *     assert.notOk('everything', 'this will fail');
+   *     assert.notOk(false, 'this will pass');
+   *
+   * @name notOk
+   * @param {Mixed} object to test
+   * @param {String} message
+   * @api public
+   */
+
+  assert.notOk = function (val, msg) {
+    new Assertion(val, msg).is.not.ok;
+  };
+
   /**
    * ### .equal(actual, expected, [message])
    *

test/assert.js

@@ -50,6 +50,24 @@ suite('assert', function () {
     }, "expected '' to be truthy");
   });
 
+  test('notOk', function () {
+    assert.notOk(false);
+    assert.notOk(0);
+    assert.notOk('');
+
+    err(function () {
+      assert.notOk(true);
+    }, "expected true to be falsy");
+
+    err(function () {
+      assert.notOk(1);
+    }, "expected 1 to be falsy");
+
+    err(function () {
+      assert.notOk('test');
+    }, "expected 'test' to be falsy");
+  });
+
   test('isFalse', function () {
     assert.isFalse(false);