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Add test for view store state access (#642)

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This commit is contained in:
Stephen Celis
2021-07-08 11:14:34 -04:00
committed by GitHub
parent b931cece42
commit e4225bee93
2 changed files with 29 additions and 9 deletions
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16
Sources/ComposableArchitecture/ViewStore.swift
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@@ -61,6 +61,11 @@ public final class ViewStore<State, Action>: ObservableObject {
// won't be synthesized automatically. To work around issues on iOS 13 we explicitly declare it.
public private(set) lazy var objectWillChange = ObservableObjectPublisher()
/// The current state.
public var state: State { self.store.state.value }
private let store: Store<State, Action>
/// Initializes a view store from a store.
///
/// - Parameters:
@@ -72,20 +77,13 @@ public final class ViewStore<State, Action>: ObservableObject {
removeDuplicates isDuplicate: @escaping (State, State) -> Bool
) {
self.publisher = StorePublisher(store.state, removeDuplicates: isDuplicate)
self._state = { store.state.value }
self._send = store.send
self.store = store
self.viewCancellable = store.state
.dropFirst()
.removeDuplicates(by: isDuplicate)
.sink { [weak self] _ in self?.objectWillChange.send() }
}
let _state: () -> State
let _send: (Action) -> Void
/// The current state.
public var state: State { _state() }
/// Returns the resulting value of a given key path.
public subscript<LocalState>(dynamicMember keyPath: KeyPath<State, LocalState>) -> LocalState {
self.state[keyPath: keyPath]
@@ -101,7 +99,7 @@ public final class ViewStore<State, Action>: ObservableObject {
///
/// - Parameter action: An action.
public func send(_ action: Action) {
self._send(action)
self.store.send(action)
}
/// Derives a binding from the store that prevents direct writes to state and instead sends