michalbujalski

// given
//    api returns contacs list
// when
//    fetch contacts is initiated
// then
//    assert progress was shown
//    assert set contacts list was called
//    assert progress was hidden

michalbujalski

view.hideProgress()
when(it){
    is NoConnectionException -> view.showNoConnectionError()
    is ApiException -> view.showError(it.msg)
}

michalbujalski

data class Contact(val name:String, val phoneNum:String)

interface ContactsListsApi{
  fetchContacts(): Single<List<Contact>>
}
interface ContactsListsContract{
  interface View{
    fun showProgress()
    fun hideProgress()
    fun setData(contacts: List<Contact>)

michalbujalski

//given
//    api returns error
//when
//    fetching contacts list
//then
//    show error message

michalbujalski

data class Contact(val name:String, val phoneNum:String)

interface ContactsListsApi{
  fetchContacts(): Single<List<Contact>>
}
interface ContactsListsContract{
  interface View{
    fun showProgress()
    fun hideProgress()
    fun setData(contacts: List<Contact>)

michalbujalski

data class Contact(val name:String, val phoneNum:String)

interface ContactsListsApi{
  fetchContacts(): Single<List<Contact>>
}
interface ContactsListsContract{
  interface View{
    fun showProgress()
    fun hideProgress()
    fun setData(contacts: List<Contact>)

michalbujalski

whenever(repository.fetchContacts()).thenReturn(emptyList()) //simulate interface response
verify(view).setData(any()) //verify `setData` method was called
verify(view, never()).setData(any()) //verify `setData` was never called
verify(view, times(2)).setData(any()) //verify `setData` was called exactly two times
...
//verify that `showProgress` and `getCurrentUser` were called in that exact order
val inOrder = inOrder(view,repository)
inOrder.verify(view).showProgress()
inOrder.verify(repository).getCurrentUser()

michalbujalski

@Test
fun `fetch contacts, api error`(){
  //given
  val errorMessage = "Bad request"
  whenver(api.fetchContacts()).thenReturn{Single.error(IllegalArgumentException(errorMessage)}
  //when
  presenter.fetchContacts()
  //then
  val inOrder = inOrder(view, api)
  inOrder.verify(view).showProgress()

michalbujalski

data class Contact(val name:String, val phoneNum:String)

interface ContactsListsApi{
  fetchContacts(): Single<List<Contact>>
}
interface ContactsListsContract{
  interface View{
    fun showProgress()
    fun hideProgress()
    fun setData(contacts: List<Contact>)

michalbujalski

interface MyLocationProvider{
  fun obtainCurrentLocation():LatLng
}
class SomePresenter(val locationProvider: MyLoacationProvider){
...
}