toHaveMethod toHaveMethod matcher for Jasmine (http://jasmine.github.io/) to check whether object has method or not. Installation npm install to-have-property --save-dev How to use require('to-have-method'); it('should have method', function() { expect({ m: function() {} }).toHaveMethod('m');}); it('should have methods', function() { expect({ m1: function() {}, m2: function() {} }).toHaveMethods('m1', 'm2');});