testNavigation.swift

testNavigation.swift

func testNavigation_whenButtonTapped_shouldPushDetailViewController() throws {
    // Given
    let nc = UINavigationController(rootViewController: sut)

    sut.loadViewIfNeeded()
    let button = sut.button

    // When
    button?.sendActions(for: .touchUpInside)
    RunLoop.current.run(until: Date()) // 1
    
    // Then
    XCTAssertEqual(nc.viewControllers.count, 2) // 2
}