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Merge pull request #27 from Ryu0118/feature/test-store
[WIP] Add `TestStore<Reducer>`
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67 changes: 67 additions & 0 deletions
67
Sources/SimplexArchitecture/Internal/ActionTransition.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| import Foundation | ||
|
|
||
| /// ``ActionTransition`` represents a transition between states in a reducer. It captures the previous and next states, the associated side effect,effect context, and the action triggering the transition. | ||
| struct ActionTransition<Reducer: ReducerProtocol> { | ||
| /// Represents a state. It includes the target state and the reducer state. | ||
| struct State { | ||
| let state: Reducer.Target.States? | ||
| let reducerState: Reducer.ReducerState? | ||
| } | ||
| /// The previous state. | ||
| let previous: Self.State | ||
| /// The next state. | ||
| let next: Self.State | ||
| /// The associated side effect. | ||
| let effect: SideEffect<Reducer> | ||
| /// The unique effect context that represents parent effect. | ||
| let effectContext: UUID | ||
| /// The Action that cause a change of state | ||
| let action: CombineAction<Reducer> | ||
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| /// - Parameters: | ||
| /// - previous: The previous state. | ||
| /// - next: The next state. | ||
| /// - effect: The unique effect context that represents parent effect. | ||
| /// - effectContext: The unique effect context that represents parent effect. | ||
| /// - action: The action responsible for the transition. | ||
| init( | ||
| previous: Self.State, | ||
| next: Self.State, | ||
| effect: SideEffect<Reducer>, | ||
| effectContext: UUID, | ||
| for action: CombineAction<Reducer> | ||
| ) { | ||
| self.previous = previous | ||
| self.next = next | ||
| self.effect = effect | ||
| self.effectContext = effectContext | ||
| self.action = action | ||
| } | ||
|
|
||
| /// Converts the `ActionTransition` to a `StateContainer` representing the next state. | ||
| /// | ||
| /// - Parameter target: The target reducer. | ||
| /// - Returns: A `StateContainer` representing the next state. | ||
| func asNextStateContainer(from target: Reducer.Target) -> StateContainer<Reducer.Target> { | ||
| asStateContainer(from: target, state: next) | ||
| } | ||
|
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| /// Converts the `ActionTransition` to a `StateContainer` representing the previous state. | ||
| /// | ||
| /// - Parameter target: The target reducer. | ||
| /// - Returns: A `StateContainer` representing the previous state. | ||
| func asPreviousStateContainer(from target: Reducer.Target) -> StateContainer<Reducer.Target> { | ||
| asStateContainer(from: target, state: previous) | ||
| } | ||
|
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||
| private func asStateContainer( | ||
| from target: Reducer.Target, | ||
| state: Self.State | ||
| ) -> StateContainer<Reducer.Target> { | ||
| .init( | ||
| target, | ||
| states: state.state, | ||
| reducerState: state.reducerState | ||
| ) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| import Foundation | ||
|
|
||
| extension Collection { | ||
| subscript(safe index: Index) -> Element? { | ||
| indices.contains(index) ? self[index] : nil | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| import Foundation | ||
|
|
||
| /// Enum to determine parent's Effect | ||
| enum EffectContext { | ||
| @TaskLocal static var id: UUID? | ||
| } |
39 changes: 39 additions & 0 deletions
39
Sources/SimplexArchitecture/Internal/Task+withEffectContext.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| import Foundation | ||
|
|
||
| extension Task where Failure == any Error { | ||
| // Granted when there is no EffectContext in the Task. | ||
| @discardableResult | ||
| static func withEffectContext( | ||
| priority: TaskPriority? = nil, | ||
| @_inheritActorContext @_implicitSelfCapture operation: @Sendable @escaping () async throws -> Success | ||
| ) -> Self { | ||
| if let _ = EffectContext.id { | ||
| Self(priority: priority, operation: operation) | ||
| } else { | ||
| Self(priority: priority) { | ||
| try await EffectContext.$id.withValue(UUID()) { | ||
| try await operation() | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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||
| extension Task where Failure == Never { | ||
| // Granted when there is no EffectContext in the Task. | ||
| @discardableResult | ||
| static func withEffectContext( | ||
| priority: TaskPriority? = nil, | ||
| @_inheritActorContext @_implicitSelfCapture operation: @Sendable @escaping () async -> Success | ||
| ) -> Self { | ||
| if let _ = EffectContext.id { | ||
| Self(priority: priority, operation: operation) | ||
| } else { | ||
| Self(priority: priority) { | ||
| await EffectContext.$id.withValue(UUID()) { | ||
| await operation() | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| import Foundation | ||
| import XCTestDynamicOverlay | ||
|
|
||
| @propertyWrapper | ||
| struct TestOnly<T> { | ||
| private var _value: T | ||
|
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| var wrappedValue: T { | ||
| _read { | ||
| if !_XCTIsTesting { | ||
| runtimeWarning("\(Self.self) is accessible only during Unit tests") | ||
| } | ||
| yield _value | ||
| } | ||
| set { | ||
| if _XCTIsTesting { | ||
| _value = newValue | ||
| } | ||
| } | ||
| } | ||
|
|
||
| init(wrappedValue: T) { | ||
| _value = wrappedValue | ||
| } | ||
| } |
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