AccountPresenter tests with router.

AccountPresenterTests.swift

class AccountPresenterTests: XCTestCase {
  func test_given_and_account_name_when_next_is_pressed_then_should_navigate_to_home() {
    let routerMock = RouterMock()
    let presenter = AccountPresenterImplementation(router: routerMock)

    presenter.nextPressed(accountName: "talkdesk")

    XCTAssertEqual(routerMock.showHomeCalled, true)    
  }
}