在Ember驗收測試中測試「加載」狀態

Question

在我的驗收測試中，我想確認在異步操作期間「加載指示器」是否正確顯示和隱藏。比方說，我有一個看起來像這樣的動作：

myAction() { 
    this.set('isLoading', true); 
    someAsyncMethod().then(answer => { 
     this.set('isLoading', false); 
    }); 
} 

而且看起來像這樣一個模板：

<button class="my-button" {{action "myAction"}}> 
    {{#if isLoading}} 
    <i class="loader"></i> 
    {{/if}} 
    Click me ! 
</button> 

最後，測試：

test('My super action', function(assert) { 
    visit('/my-route'); 
    andThen(() => { 
     click('.my-button'); 
     // Here, since the click() helper is async, the action isn't 
     // called, so the loader isn't shown yet. 
    }); 
    andThen(() => { 
     // Here, the load is finished, so the loader is removed 
    }); 
}); 

我的問題是：我可以在哪裏做斷言，顯示加載程序？

Answer 1

test('My super action', function(assert) { 
    visit('/my-route'); 
    andThen(() => { 
     click('.my-button'); 
     // Here, since the click() helper is async, the action isn't 
     // called, so the loader isn't shown yet. 
     Ember.run.next(function() { 
     //here is fine, as we are in the next run loop the promise returned in the action has started loading 
     }); 
    }); 
    andThen(() => { 
    // Here, the load is finished, so the loader is removed 
    }); 
});