Angular

});
}));
it("Should have an array of heros", async(()=>
this.fixture.whenStable().then(()=> {
const cmp = this.fixture.componentInstance;
expect(cmp.heroes).toBeDefined("component should have a list of heroes");
expect(cmp.heroes.length).toEqual(10, "heroes list should have 10 members");
cmp.heroes.map((h, i)=> {
expect(h instanceof Hero).toBeTruthy(`member ${i} is not a Hero instance. ${h}`)
});
})));
it("Should have one list item per hero", async(()=>
this.fixture.whenStable().then(()=> {
const ul = this.fixture.nativeElement.querySelector("ul.heroes");
const li = Array.prototype.slice.call(
this.fixture.nativeElement.querySelectorAll("ul.heroes>li"));
const cmp = this.fixture.componentInstance;
expect(ul).toBeTruthy("There should be an unnumbered list for heroes");
expect(li.length).toEqual(cmp.heroes.length, "there should be one li for each hero");
li.forEach((li, i)=> {
expect(li.querySelector("span.badge"))
.toBeTruthy(`hero ${i} has to have a span for id`);
expect(li.querySelector("span.badge").textContent.trim())
.toEqual(cmp.heroes[i].id.toString(), `hero ${i} had wrong id displayed`);
expect(li.textContent)
.toMatch(cmp.heroes[i].name, `hero ${i} has wrong name displayed`);
});
})));
it("should have correct styling of hero items", async(()=>
this.fixture.whenStable().then(()=> {
const hero = this.fixture.nativeElement.querySelector("ul.heroes>li");
const win = hero.ownerDocument.defaultView ||hero.ownerDocument.parentWindow;
const styles = win.getComputedStyle(hero);
expect(styles["cursor"]).toEqual("pointer", "cursor should be pointer on hero");
expect(styles["borderRadius"]).toEqual("4px", "borderRadius should be 4px");
})));
it("should have a click handler for hero items",async(()=>
this.fixture.whenStable().then(()=>{
const cmp = this.fixture.componentInstance;
expect(cmp.onSelect)
.toBeDefined("should have a click handler for heros");
expect(this.fixture.nativeElement.querySelector("input.heroName"))
.toBeNull("should not show the hero details when no hero has been selected");
expect(this.fixture.nativeElement.querySelector("ul.heroes li.selected"))
.toBeNull("Should not have any selected heroes at start");
spyOn(cmp,"onSelect").and.callThrough();
this.fixture.nativeElement.querySelectorAll("ul.heroes li")[5].click();
});
));
})
expect(cmp.onSelect)
.toHaveBeenCalledWith(cmp.heroes[5]);
expect(cmp.selectedHero)
.toEqual(cmp.heroes[5], "click on hero should change hero");
Noteworthy in this is how we have beforeEach() configure a test module and create the component in test, and
GoalKicker.com – Angular 2 Notes for Professionals 214