public async Task PopulateAllDaysAsync_ServiceFailure_DoesNotChangeState()
{
// 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.PopulateAllDaysAsync();
// assert
Assert.Single(vm.AllDays, expected: day);
}
public async Task PopulateAllDaysAsync_ServiceFailure_SendsMessage()
{
// arrange
var tracker = new Tracker {
Id = 0
};
var vm = new TrackerLogViewModel(tracker, new FailingTrackerLogService(), new MockSettingsViewModel());
bool messageSent = false;
MessagingCenter.Subscribe <TrackerLogViewModel>(this, TrackerLogViewModel.DatabaseErrorMessage,
sender => messageSent = true);
// act
await vm.PopulateAllDaysAsync();
// assert
Assert.True(messageSent);
}