htc_4_4.swift

func testAfterDataLoadedEventStateWillBeChangedIntoLoadedWithReceivedData() {
    // Given
    let initialState: State = .initial
    let data = ["first", "second"]
    // When
    let resultState = State.reduce(state: initialState, event: .dataLoaded(data: data))
    // Then
    XCTAssertEqual(resultState, .loaded(data: data))
}