'use strict';

var NavigationScenesReducer=require('../NavigationScenesReducer');




function testTransition(states){
var routes=states.map(function(keys){
return{
index:0,
routes:keys.map(function(key){
return{key:key};
})};

});

var scenes=[];
var prevState=null;
routes.forEach(function(nextState){
scenes=NavigationScenesReducer(scenes,nextState,prevState);
prevState=nextState;
});

return scenes;
}

describe('NavigationScenesReducer',function(){

it('gets initial scenes',function(){
var scenes=testTransition([
['1','2']]);


expect(scenes).toEqual([
{
index:0,
isActive:true,
isStale:false,
key:'scene_1',
route:{
key:'1'}},


{
index:1,
isActive:false,
isStale:false,
key:'scene_2',
route:{
key:'2'}}]);



});

it('pushes new scenes',function(){

var scenes=testTransition([
['1','2'],
['1','2','3']]);


expect(scenes).toEqual([
{
index:0,
isActive:true,
isStale:false,
key:'scene_1',
route:{
key:'1'}},


{
index:1,
isActive:false,
isStale:false,
key:'scene_2',
route:{
key:'2'}},


{
index:2,
isActive:false,
isStale:false,
key:'scene_3',
route:{
key:'3'}}]);



});

it('gets active scene when index changes',function(){
var state1={
index:0,
routes:[{key:'1'},{key:'2'}]};


var state2={
index:1,
routes:[{key:'1'},{key:'2'}]};


var scenes1=NavigationScenesReducer([],state1,null);
var scenes2=NavigationScenesReducer(scenes1,state2,state1);
var route=scenes2.find(function(scene){return scene.isActive;}).route;
expect(route).toEqual({key:'2'});
});

it('gets same scenes',function(){
var state1={
index:0,
routes:[{key:'1'},{key:'2'}]};


var state2={
index:0,
routes:[{key:'1'},{key:'2'}]};


var scenes1=NavigationScenesReducer([],state1,null);
var scenes2=NavigationScenesReducer(scenes1,state2,state1);
expect(scenes1).toBe(scenes2);
});

it('gets different scenes when keys are different',function(){
var state1={
index:0,
routes:[{key:'1'},{key:'2'}]};


var state2={
index:0,
routes:[{key:'2'},{key:'1'}]};


var scenes1=NavigationScenesReducer([],state1,null);
var scenes2=NavigationScenesReducer(scenes1,state2,state1);
expect(scenes1).not.toBe(scenes2);
});

it('gets different scenes when routes are different',function(){
var state1={
index:0,
routes:[{key:'1',x:1},{key:'2',x:2}]};


var state2={
index:0,
routes:[{key:'1',x:3},{key:'2',x:4}]};


var scenes1=NavigationScenesReducer([],state1,null);
var scenes2=NavigationScenesReducer(scenes1,state2,state1);
expect(scenes1).not.toBe(scenes2);
});


it('gets different scenes when state index changes',function(){
var state1={
index:0,
routes:[{key:'1',x:1},{key:'2',x:2}]};


var state2={
index:1,
routes:[{key:'1',x:1},{key:'2',x:2}]};


var scenes1=NavigationScenesReducer([],state1,null);
var scenes2=NavigationScenesReducer(scenes1,state2,state1);
expect(scenes1).not.toBe(scenes2);
});

it('pops scenes',function(){

var scenes=testTransition([
['1','2','3'],
['1','2']]);


expect(scenes).toEqual([
{
index:0,
isActive:true,
isStale:false,
key:'scene_1',
route:{
key:'1'}},


{
index:1,
isActive:false,
isStale:false,
key:'scene_2',
route:{
key:'2'}},


{
index:2,
isActive:false,
isStale:true,
key:'scene_3',
route:{
key:'3'}}]);



});

it('replaces scenes',function(){
var scenes=testTransition([
['1','2'],
['3']]);


expect(scenes).toEqual([
{
index:0,
isActive:false,
isStale:true,
key:'scene_1',
route:{
key:'1'}},


{
index:0,
isActive:true,
isStale:false,
key:'scene_3',
route:{
key:'3'}},


{
index:1,
isActive:false,
isStale:true,
key:'scene_2',
route:{
key:'2'}}]);



});

it('revives scenes',function(){
var scenes=testTransition([
['1','2'],
['3'],
['2']]);


expect(scenes).toEqual([
{
index:0,
isActive:false,
isStale:true,
key:'scene_1',
route:{
key:'1'}},


{
index:0,
isActive:true,
isStale:false,
key:'scene_2',
route:{
key:'2'}},


{
index:0,
isActive:false,
isStale:true,
key:'scene_3',
route:{
key:'3'}}]);



});
});