SelectionReducerTests.swift

//
//  SelectionReducerTests.swift
//  ReSwift-Todo
//
//  Created by Christian Tietze on 15/09/16.
//  Copyright © 2016 ReSwift. All rights reserved.
//

import XCTest
@testable import ReSwiftTodo

class SelectionReducerTests: XCTestCase {

    func testHandleAction_WithUnsupportedActionAndNil_ReturnsNil() {

        struct SomeAction: Action { }

        XCTAssertNil(selectionReducer(SomeAction(), state: nil))
    }

    func testHandleAction_WithUnsupportedActionAndState_ReturnsState() {

        struct SomeAction: Action { }
        let state = SelectionState(123)

        let result = selectionReducer(SomeAction(), state: SelectionState(123))

        XCTAssertEqual(result, state)
    }

    func testHandleAction_WithDeselectAndNil_ReturnsNil() {

        let state = SelectionState.none

        let result = selectionReducer(SelectionAction.deselect, state: state)

        XCTAssertNil(result)
    }

    func testHandleAction_WithDeselectAndState_ReturnsNil() {

        let state = SelectionState(456)

        let result = selectionReducer(SelectionAction.deselect, state: state)

        XCTAssertNil(result)
    }

    func testHandleAction_WithSelectionChangeAndNil_ReturnsNewState() {

        let state = SelectionState.none
        let newValue = 9812

        let result = selectionReducer(SelectionAction.select(row: newValue), state: state)

        XCTAssertEqual(result, SelectionState(newValue))
    }

    func testHandleAction_WithSelectionStateAndState_ReturnsNewState() {

        let state = SelectionState.none
        let newValue = 4466

        let result = selectionReducer(SelectionAction.select(row: newValue), state: state)

        XCTAssertEqual(result, SelectionState(newValue))
    }
}