decojs/Specs/Modules/for_spa/for_whenContext/when_destroying_child_contexts.js

Scalable frontend architecture

describe("when destroying child contexts", [
  'deco/spa/whenContext'
], function(
  whenContext
){

  var when;

  beforeEach(function(){
    when = whenContext();
  });

  afterEach(function(){
    whenContext.destroyChildContexts();
  });

  describe("when this context subscribes to thisIsDestroyed", function(){

    var spy;

    because(function(){
      spy = sinon.spy();

      whenContext.thisIsDestroyed(spy);

      whenContext.destroyChildContexts();
    });

    it("should not destroy itself", function(){
      expect(spy.callCount).toBe(0);
    });

  });

  describe("when a child context subscribes to thisIsDestroyed", function(){

    var spy;

    because(function(){
      spy = sinon.spy();

      when.thisIsDestroyed(spy);

      whenContext.destroyChildContexts();
    });

    it("should destroy the child context", function(){
      expect(spy.callCount).toBe(1);
    });

  });

  describe("when a destroyed context is used", function(){

    var spy;

    because(function(){
      whenContext.destroyChildContexts();
    });

    it("should throw an exception", function(){
      expect(when).toThrow();
    });

  });

});