vikingosegundo

[
    ▿(.⅛,(.g,.g,.g)),  ⩀(♪(.e,.½)), ▬(.⅛),
    ▿(.⅛,(.f,.f,.f)), ⩀(♪(♭.d,.½)), ▬(.⅛)
]

vikingosegundo

change(store, .by(.adding(.item(i))) )
respond(.item(i, .wasAdded))
expect(items(in: appState)).to(beEmpty())
expect(dueDate(of:first(of:items(in: appState))!)).to(equal(Date.tomorrow.noon))
expect(dueDate(of:first(of:appState.items)!)).to(equal(Date.tomorrow.noon))
let newItem = change(item, .by(.updating(.completed(to: true))))

vikingosegundo

change(store, .by(.adding(.item(i))) )

vikingosegundo

respond(.item(i, .wasAdded))

vikingosegundo

expect(items(in: appState)).to(beEmpty())

vikingosegundo

expect(dueDate(of:first(of:items(in: appState))!)).to(equal(Date.tomorrow.noon))

vikingosegundo

expect(dueDate(of:first(of:appState.items)!)).to(equal(Date.tomorrow.noon))

vikingosegundo

let newItem = change(item, .by(.updating(.completed(to: true))))

vikingosegundo

public func change(_ item: TodoItem, _ changes: TodoItem.Change...) -> TodoItem { item.alter(changes) }

vikingosegundo

public
struct TodoItem: Identifiable, Hashable, Codable {
    public enum Change: Equatable, Identifiable {
        public var id: String {
            switch self {
            case .by(.updating(.completed(let     b))): return "\(b)"
            case .by(.updating(.dueDate  (let     d))): return d != nil ? "\(d!)" : "\(Date())"
            case .by(.updating(.text     (let     t))): return t
            case .by(.updating(.fork     (let inner))): return inner.reduce("") { "\($0)\($1)" }
            }