public async Task DeleteLoggedDayAsync_NullDay_DoesNothing()
{
// arrange
var tracker = new Tracker {
Id = 0
};
var vm = new TrackerLogViewModel(tracker, new MockTrackerLogService(), new MockSettingsViewModel());
vm.AllDays.Add(null);
// act
await vm.DeleteLoggedDayAsync(null);
// assert
Assert.Single(vm.AllDays, expected: null);
}
public async Task DeleteLoggedDayAsync_ServiceFailure_DoesNotDeleteFromAllDays()
{
// arrange
var tracker = new Tracker {
Id = 0
};
var day = new LoggedDay {
Id = 0, TrackerId = 0
};
var vm = new TrackerLogViewModel(tracker, new FailingTrackerLogService(), new MockSettingsViewModel());
vm.AllDays.Add(day);
// act
await vm.DeleteLoggedDayAsync(day);
// assert
Assert.Single(vm.AllDays, expected: day);
}
public async Task DeleteLoggedDayAsync_ExistingDay_DeletesDay()
{
// arrange
var tracker = new Tracker {
Id = 0
};
var day = new LoggedDay {
Id = 0, TrackerId = 0
};
var service = new MockTrackerLogService();
var vm = new TrackerLogViewModel(tracker, service, new MockSettingsViewModel());
service.LoggedDays.Add(day);
vm.AllDays.Add(day);
// act
await vm.DeleteLoggedDayAsync(day);
// assert
Assert.Empty(vm.AllDays);
Assert.Empty(service.LoggedDays);
}
public async Task DeleteLoggedDayAsync_ServiceFailure_SendsMessageWithDay()
{
// arrange
var tracker = new Tracker {
Id = 0
};
var day = new LoggedDay {
Id = 0, TrackerId = 0
};
var vm = new TrackerLogViewModel(tracker, new FailingTrackerLogService(), new MockSettingsViewModel());
vm.AllDays.Add(day);
LoggedDay sentDay = null;
MessagingCenter.Subscribe <TrackerLogViewModel, LoggedDay>(this, nameof(vm.DeleteLoggedDayCommand),
(sender, loggedDay) => sentDay = loggedDay);
// act
await vm.DeleteLoggedDayAsync(day);
// assert
Assert.Equal(day, sentDay);
}