How to stub methods sooner than @Before block?
0
I initialize my ViewModel at top level, and as it initializes, it calls its init {} block, which then calls methods that I stub in @Before block.
Although all the tests are passed, NullPointerExceptions is thrown in methods that I call in init {}. I tried to lateinit my ViewModel in @Before block. It didn't work.
// AViewModelTest.kt
private val repoMock: ARepository = mock()
private val viewModel: AViewModel = AViewModel(repoMock)
@Before
fun setup() {
// method stubbing
`when`(repoMock.getSmth()).thenReturn(response)
}
// AViewModel.kt
constructor(repo: ARepository) {}
init {
onStartLoading(repo)
}
fun onStartLoading(repo: ARepository) {
val response = repo.getSmth()
handleResponse(response) // response is null here -> NullPointerException
}
android junit kotlin asked Nov 23 '18 at 11:59
madimmadim
314418
|
show 3 more comments
0
I initialize my ViewModel at top level, and as it initializes, it calls its init {} block, which then calls methods that I stub in @Before block.
Although all the tests are passed, NullPointerExceptions is thrown in methods that I call in init {}. I tried to lateinit my ViewModel in @Before block. It didn't work.
// AViewModelTest.kt
private val repoMock: ARepository = mock()
private val viewModel: AViewModel = AViewModel(repoMock)
@Before
fun setup() {
// method stubbing
`when`(repoMock.getSmth()).thenReturn(response)
}
// AViewModel.kt
constructor(repo: ARepository) {}
init {
onStartLoading(repo)
}
fun onStartLoading(repo: ARepository) {
val response = repo.getSmth()
handleResponse(response) // response is null here -> NullPointerException
}
asked Nov 23 '18 at 11:59
madimmadim
314418
1
Could you add some code as well?
– tynn
Nov 23 '18 at 12:03
You could try the @BeforeClass annotation: stackoverflow.com/questions/20295578/…
– MasterQueue
Nov 23 '18 at 12:13
1
Please read "How to create a Minimal, Complete, and Verifiable example". Then use the edit link to improve your question (do not add more information via comments). Otherwise we are not able to answer your question and help you.
– GhostCat
Nov 23 '18 at 13:27
@tynn updated the question
– madim
Nov 26 '18 at 3:36
1
initblocks are equivalent to constructor bodies, and so they will always be called before any methods. This is expected behavior.repoisnullwhenonStartLoading(repo)is called frominit.
– Brucelet
Nov 26 '18 at 3:37
|
show 3 more comments
0
0
0
I initialize my ViewModel at top level, and as it initializes, it calls its init {} block, which then calls methods that I stub in @Before block.
Although all the tests are passed, NullPointerExceptions is thrown in methods that I call in init {}. I tried to lateinit my ViewModel in @Before block. It didn't work.
// AViewModelTest.kt
private val repoMock: ARepository = mock()
private val viewModel: AViewModel = AViewModel(repoMock)
@Before
fun setup() {
// method stubbing
`when`(repoMock.getSmth()).thenReturn(response)
}
// AViewModel.kt
constructor(repo: ARepository) {}
init {
onStartLoading(repo)
}
fun onStartLoading(repo: ARepository) {
val response = repo.getSmth()
handleResponse(response) // response is null here -> NullPointerException
}
asked Nov 23 '18 at 11:59
madimmadim
314418
I initialize my ViewModel at top level, and as it initializes, it calls its init {} block, which then calls methods that I stub in @Before block.
Although all the tests are passed, NullPointerExceptions is thrown in methods that I call in init {}. I tried to lateinit my ViewModel in @Before block. It didn't work.
// AViewModelTest.kt
private val repoMock: ARepository = mock()
private val viewModel: AViewModel = AViewModel(repoMock)
@Before
fun setup() {
// method stubbing
`when`(repoMock.getSmth()).thenReturn(response)
}
// AViewModel.kt
constructor(repo: ARepository) {}
init {
onStartLoading(repo)
}
fun onStartLoading(repo: ARepository) {
val response = repo.getSmth()
handleResponse(response) // response is null here -> NullPointerException
}
asked Nov 23 '18 at 11:59
madimmadim
314418
asked Nov 23 '18 at 11:59
madimmadim
314418
edited Nov 26 '18 at 3:43
madim
asked Nov 23 '18 at 11:59
madimmadim
314418
asked Nov 23 '18 at 11:59
madimmadim
314418
asked Nov 23 '18 at 11:59
madimmadim
314418
314418
1
Could you add some code as well?
– tynn
Nov 23 '18 at 12:03
You could try the @BeforeClass annotation: stackoverflow.com/questions/20295578/…
– MasterQueue
Nov 23 '18 at 12:13
1
Please read "How to create a Minimal, Complete, and Verifiable example". Then use the edit link to improve your question (do not add more information via comments). Otherwise we are not able to answer your question and help you.
– GhostCat
Nov 23 '18 at 13:27
@tynn updated the question
– madim
Nov 26 '18 at 3:36
1
initblocks are equivalent to constructor bodies, and so they will always be called before any methods. This is expected behavior.repoisnullwhenonStartLoading(repo)is called frominit.
– Brucelet
Nov 26 '18 at 3:37
|
show 3 more comments
1
Could you add some code as well?
– tynn
Nov 23 '18 at 12:03
You could try the @BeforeClass annotation: stackoverflow.com/questions/20295578/…
– MasterQueue
Nov 23 '18 at 12:13
1
Please read "How to create a Minimal, Complete, and Verifiable example". Then use the edit link to improve your question (do not add more information via comments). Otherwise we are not able to answer your question and help you.
– GhostCat
Nov 23 '18 at 13:27
@tynn updated the question
– madim
Nov 26 '18 at 3:36
1
initblocks are equivalent to constructor bodies, and so they will always be called before any methods. This is expected behavior.repoisnullwhenonStartLoading(repo)is called frominit.
– Brucelet
Nov 26 '18 at 3:37
1
1
Could you add some code as well?
– tynn
Nov 23 '18 at 12:03
Could you add some code as well?
– tynn
Nov 23 '18 at 12:03
You could try the @BeforeClass annotation: stackoverflow.com/questions/20295578/…
– MasterQueue
Nov 23 '18 at 12:13
You could try the @BeforeClass annotation: stackoverflow.com/questions/20295578/…
– MasterQueue
Nov 23 '18 at 12:13
1
1
Please read "How to create a Minimal, Complete, and Verifiable example". Then use the edit link to improve your question (do not add more information via comments). Otherwise we are not able to answer your question and help you.
– GhostCat
Nov 23 '18 at 13:27
Please read "How to create a Minimal, Complete, and Verifiable example". Then use the edit link to improve your question (do not add more information via comments). Otherwise we are not able to answer your question and help you.
– GhostCat
Nov 23 '18 at 13:27
@tynn updated the question
– madim
Nov 26 '18 at 3:36
@tynn updated the question
– madim
Nov 26 '18 at 3:36
1
1
init blocks are equivalent to constructor bodies, and so they will always be called before any methods. This is expected behavior. repo is null when onStartLoading(repo) is called from init.– Brucelet
Nov 26 '18 at 3:37
init blocks are equivalent to constructor bodies, and so they will always be called before any methods. This is expected behavior. repo is null when onStartLoading(repo) is called from init.– Brucelet
Nov 26 '18 at 3:37
|
show 3 more comments
1 Answer
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In the end, lateinit in @Before did the thing. The problem occurred because I had an implicit reference to Android Context in my ViewModel.
answered Nov 26 '18 at 9:38
madimmadim
314418
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In the end, lateinit in @Before did the thing. The problem occurred because I had an implicit reference to Android Context in my ViewModel.
answered Nov 26 '18 at 9:38
madimmadim
314418
add a comment |
0
In the end, lateinit in @Before did the thing. The problem occurred because I had an implicit reference to Android Context in my ViewModel.
answered Nov 26 '18 at 9:38
madimmadim
314418
add a comment |
0
0
0
In the end, lateinit in @Before did the thing. The problem occurred because I had an implicit reference to Android Context in my ViewModel.
answered Nov 26 '18 at 9:38
madimmadim
314418
In the end, lateinit in @Before did the thing. The problem occurred because I had an implicit reference to Android Context in my ViewModel.
answered Nov 26 '18 at 9:38
madimmadim
314418
edited Nov 28 '18 at 3:42
answered Nov 26 '18 at 9:38
madimmadim
314418
answered Nov 26 '18 at 9:38
madimmadim
314418
answered Nov 26 '18 at 9:38
madimmadim
314418
314418
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1
Could you add some code as well?
– tynn
Nov 23 '18 at 12:03
You could try the @BeforeClass annotation: stackoverflow.com/questions/20295578/…
– MasterQueue
Nov 23 '18 at 12:13
1
Please read "How to create a Minimal, Complete, and Verifiable example". Then use the edit link to improve your question (do not add more information via comments). Otherwise we are not able to answer your question and help you.
– GhostCat
Nov 23 '18 at 13:27
@tynn updated the question
– madim
Nov 26 '18 at 3:36
1
initblocks are equivalent to constructor bodies, and so they will always be called before any methods. This is expected behavior.repoisnullwhenonStartLoading(repo)is called frominit.– Brucelet
Nov 26 '18 at 3:37