code: function(obj){
          console.warn('should.contain() is deprecated, use should.include()');
          this.obj.should.be.an.instanceof(Array);
          this.assert(
              ~this.obj.indexOf(obj)
              , function(){ return 'expected ' + this.inspect + ' to contain ' + i(obj) }
              , function(){ return 'expected ' + this.inspect + ' to not contain ' + i(obj) });
          return this;
      }
docs: Assert that the array contains _obj_.
  
  @param {Mixed} obj
  @api public