An example spec for use with Jasmine and Ext JS 4

MyWidgetSpec.js

Ext.require("MyApp.widget.MyWidget");

describe("MyApp.widget.MyWidget", function() {
  var widget;
  
  beforeEach(function() {
    widget = Ext.create("MyApp.widget.MyWidget", {
      renderTo: "test",
      value: "Some Initial Value",
    });
  });
  
  afterEach(function() {
    Ext.destroy(widget);
  });

  it("displays the initial value", function() {
    expect($('#test .display').text()).toEqual("Some Initial Value");
  });
});