public void GivenMessage_ReturnsBrowserScreen()
{
var message = new SelectWordMessage(Dionysus);
var state = _reducer.Reduce(message, _initialState);
state.CurrentScreen.Should().BeOfType <VocabularyBrowserScreen>();
}
public WordTutorApplication Reduce(IReduxMessage message, WordTutorApplication currentState)
{
if (currentState is null)
{
throw new ArgumentNullException(nameof(currentState));
}
if (!(currentState.CurrentScreen is VocabularyBrowserScreen))
{
return(currentState);
}
return((message ?? throw new ArgumentNullException(nameof(message)))
switch
{
ClearSelectedWordMessage _ => currentState.UpdateScreen(
(VocabularyBrowserScreen s) => s.ClearSelection()),
SelectWordMessage m => currentState.UpdateScreen(
(VocabularyBrowserScreen s) => s.WithSelection(m.Word)),
OpenScreenForNewWordMessage _ => currentState.OpenScreen(
ModifyVocabularyWordScreen.ForNewWord()),
OpenScreenForModifyingWordMessage m => currentState.OpenScreen(
ModifyVocabularyWordScreen.ForExistingWord(m.Word)),
_ => currentState,
});
public void GivenMessage_ChangesSelection()
{
var message = new SelectWordMessage(Dionysus);
var state = _reducer.Reduce(message, _initialState);
var screen = (VocabularyBrowserScreen)state.CurrentScreen;
screen.Selection.Should().Be(Dionysus);
}
