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 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_NewDay_DoesNothing()
{
// arrange
var tracker = new Tracker {
Id = 0
};
var newDay = new LoggedDay {
Id = 0, TrackerId = 0
};
var existingDay = new LoggedDay {
Id = 5, TrackerId = 0
};
var vm = new TrackerLogViewModel(tracker, new MockTrackerLogService(), new MockSettingsViewModel());
vm.AllDays.Add(existingDay);
// act
await vm.DeleteLoggedDayAsync(newDay);
// assert
Assert.Single(vm.AllDays, expected: existingDay);
}
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);
}
