import addChangeUrlEvent from './change-url-event';
 
 
 it("it should add changeUrlEventCreator to popstate,pushstate,replacestate", () => {
   // given
   const window = {};
   const map = {};
 
   window.addEventListener = jest.fn((event, cb) => {
     map[event] = cb;
   });
 
   // when
   addChangeUrlEvent(window);
 
   // then
   expect(map['popstate']).toBeDefined();
   expect(map['pushstate']).toBeDefined();
   expect(map['replacestate']).toBeDefined();
 
 });
 
 
 it("given event handler should generate a urlchange event only when url changes", () => {
   // given
   const window = {
     location: {
       hash: '#hash',
       host: 'example.com',
       hostname: 'example',
       origin: '',
       href: '',
       pathname: '/path/to/thing',
       port: 80,
       protocol: 'https:'
     }
   };
   const map = {};
   const calls = [];
 
   window.addEventListener = jest.fn((event, cb) => {
     map[event] = cb;
   });
 
   window.dispatchEvent = jest.fn(ev => {
     const evName = ev.type;
     calls.push(ev);
     if(map[evName]) {
       map[evName].handleEvent(ev);
     }
   });
 
   // when
   addChangeUrlEvent(window);
   window.dispatchEvent(new Event('popstate'));
   window.dispatchEvent(new Event('popstate'));
 
   // then
   expect(calls.length).toEqual(3);
   expect(calls[1].type).toEqual('urlchanged');
   expect(calls[1].detail).toEqual(window.location);
 
   //when
   window.location.pathname = '/new/path';
   window.dispatchEvent(new Event('popstate'));
 
   //then
   expect(calls.length).toEqual(5);
   expect(calls[4].type).toEqual('urlchanged');
   expect(calls[4].detail).toEqual(window.location);
 });
 
 it("should only add url events 1x when addChangeUrlEvent is called on window more than 1x", () => {

   // given

   const window = {};

   const map = {};
 
   window.addEventListener = jest.fn((event, cb) => {
     if(!map[event]) {
       map[event] = [];
     }
     map[event].push(cb);
   });
 
   // when
   addChangeUrlEvent(window);
   addChangeUrlEvent(window);
   addChangeUrlEvent(window);
 
 
   expect(Object.keys(map).length).toEqual(3);
   //then
   for (let event of Object.keys(map)) {
     expect(map[event].length).toEqual(1);
   }
 

 });