javascript - how can i create MockActivatedRoute for the parent routes of ActivatedRoute in angular 4 Unit testing -


lets have component access parent route this:

ngoninit() {     this.sub = this.route.parent.parent.parent.params.subscribe(params => {     this.siteid = params["siteid"];     this.loadcontents();     this.loadtypes(this.siteid); });}

i m providing fake value parent route this:

 providers: [         siteservice,         userservice,         modal,         overlay,         {             provide: activatedroute,             usevalue: { parent: { parent: { parent: { 'params': observable.from([{ 'siteid': '156' }]) } } } },         },         overlayrenderer,         authhttp,         messageservice,     ],

it giving me following error:

failed: cannot read property 'undefined' of undefined

at line:

usevalue: { parent: { parent: { parent: { 'params': observable.from([{ 'siteid': '156' }]) } } } },

please tell me doing in correct. have referenced following link:

how mock activatedroute parent route, testing angular 2 parent route


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