我正在尝试测试以下类(class)。我遇到问题的方法是 showScollerView
,因为我试图对行为进行 stub /模拟,然后在测试中验证行为。
class CustomScrollerView @JvmOverloads constructor(
context: Context,
attributeSet: AttributeSet? = null,
styleAttributes: Int = 0)
: ConstraintLayout(context, attributeSet, styleAttributes) {
private var fragment: ConstraintLayout by Delegates.notNull()
private var layoutResEnding: Int = 0
private val transition = ChangeBounds()
private val constraintSet = ConstraintSet()
private var isShowing = false
init {
View.inflate(context, R.layout.overview_scroller_view, this)
transition.interpolator = AccelerateInterpolator()
transition.duration = 300
}
fun <L: ConstraintLayout> setView(view: L) {
fragment = view
}
fun setLayoutResourceFinish(@LayoutRes id: Int) {
layoutResEnding = id
}
fun showScrollerView() {
constraintSet.clone(context, layoutResEnding)
TransitionManager.beginDelayedTransition(fragment, transition)
constraintSet.applyTo(fragment)
isShowing = true
}
fun isScrollViewShowing() = isShowing
}
这是测试类
class CustomScrollerViewTest: RobolectricTest() {
@Mock
lateinit var constraintSet: ConstraintSet
@Mock
lateinit var constraintLayout: ConstraintLayout
private var customScrollerView: CustomScrollerView by Delegates.notNull()
@Before
fun setup() {
customScrollerView = CustomScrollerView(RuntimeEnvironment.application.baseContext)
}
@Test
fun `test that CustomScrollerView is not null`() {
assertThat(customScrollerView).isNotNull()
}
@Test
fun `test that the scrollerView is shown`() {
doNothing().`when`(constraintSet.clone(RuntimeEnvironment.application.baseContext, R.layout.fragment)) /* Error here */
doNothing().`when`(constraintSet).applyTo(constraintLayout)
customScrollerView.setLayoutResourceFinish(R.layout.fragment)
customScrollerView.setView(constraintLayout)
customScrollerView.showScrollerView()
assertThat(customScrollerView.isScrollViewShowing()).isEqualTo(true)
verify(constraintSet).applyTo(constraintLayout)
verify(constraintSet).clone(RuntimeEnvironment.application.baseContext, R.layout.fragment)
}
}
我在这一行得到了错误:
doNothing().when(constraintSet.clone(RuntimeEnvironment.application.baseContext, R.layout.fragment))
这是实际的错误信息:
Unfinished stubbing detected here: -> at com.nhaarman.mockito_kotlin.MockitoKt.doNothing(Mockito.kt:108)
E.g. thenReturn() may be missing. Examples of correct stubbing: when(mock.isOk()).thenReturn(true); when(mock.isOk()).thenThrow(exception); doThrow(exception).when(mock).someVoidMethod(); Hints: 1. missing thenReturn() 2. you are trying to stub a final method, which is not supported 3: you are stubbing the behaviour of another mock inside before 'thenReturn' instruction if completed
最佳答案
您遇到错误的那一行应该是:
doNothing().`when`(constraintSet).clone(RuntimeEnvironment.application.baseContext, R.layout.fragment)
就像 javadoc here 中的示例一样:
List list = new LinkedList();
List spy = spy(list);
//let's make clear() do nothing
doNothing().when(spy).clear();
spy.add("one");
//clear() does nothing, so the list still contains "one"
spy.clear();
关于android - 返回 void 返回类型的模拟 stub ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/51740142/