var expect = require("chai").expect; module.exports = function (helpers) { var states = { original: { heading: "original colors", message: "These are primary colors!", colors: ["red", "green", "blue"], }, new: { heading: "new colors", colors: ["orange", "yellow", "purple"], }, }; var component = helpers.mount(require.resolve("./index"), states.original); expect(component.state.heading).to.equal(states.original.heading); expect(component.state.message).to.equal(states.original.message); expect(component.state.colors).to.deep.equal(states.original.colors); component.replaceState(states.new); component.update(); expect(component.state.heading).to.equal(states.new.heading); expect(component.state.message).to.equal(states.new.message); // undefined expect(component.state.colors).to.deep.equal(states.new.colors); };