async Task Add()
{
var name = await App.Current.MainPage.DisplayPromptAsync("Name", "Name of coffee");
var roaster = await App.Current.MainPage.DisplayPromptAsync("Roaster", "Roaster of coffee");
await CoffeeService.AddCoffee(name, roaster);
await Refresh();
}
public void AddNullCoffee_Throws_NewException()
{
var ex = Assert.ThrowsAsync <Exception>(() => coffeeService.AddCoffee(null));
Assert.AreEqual(ex.Message, "You should not add null entries!");
}