無法在Android Studio中使用Realm + PowerMockito運行Robolectric測試

Question

我使用Realm，PowerMockito和Robolectric爲我的應用編寫測試。如果我使用./gradlew test，但是如果我使用Android Studio中的配置運行，測試運行良好。它會顯示如下錯誤。

com.thoughtworks.xstream.converters.ConversionException: Cannot construct org.powermock.modules.junit4.rule.PowerMockStatement$1 as it does not have a no-args constructor : Cannot construct org.powermock.modules.junit4.rule.PowerMockStatement$1 as it does not have a no-args constructor

有沒有人有這個問題的解決方案？這是我在Kotlin寫的測試。

@RunWith(RobolectricGradleTestRunner::class) 
@Config(application = TestApplication::class, constants = BuildConfig::class, sdk = intArrayOf(21)) 
@PowerMockIgnore("org.mockito.*", "org.robolectric.*", "android.*") 
@SuppressStaticInitializationFor("io.realm.internal.Util") 
@PrepareForTest(RealmCore::class, RealmLog::class, Realm::class, RealmResults::class, RealmQuery::class) 
class RealmMiddlewareTest { 

    data class TestState(var item: List<Item> = listOf()) 

    lateinit var realmMock: Realm 

    lateinit var mockRealmResults: RealmResults<Item> 

    val mockResults = arrayListOf(
      Item().apply { 
       title = "item#1" 
      }, 
      Item().apply { 
       title = "item#2" 
      }, 
      Item().apply { 
       title = "item#3" 
      } 
    ) 

    @get:Rule 
    val rule = PowerMockRule() 

    @Before 
    fun setUp() { 
     PowerMockito.mockStatic(RealmCore::class.java) 
     PowerMockito.mockStatic(RealmLog::class.java) 
     PowerMockito.mockStatic(Realm::class.java) 
     PowerMockito.mockStatic(RealmResults::class.java) 
     Realm.init(RuntimeEnvironment.application) 
     // Create the mock 
     realmMock = PowerMockito.mock(Realm::class.java) 

     // TODO: Better solution would be just mock the RealmConfiguration.Builder class. But it seems there is some 
     // problems for powermock to mock it (static inner class). We just mock the RealmCore.loadLibrary(Context) which 
     // will be called by RealmConfiguration.Builder's constructor. 
     PowerMockito.doNothing().`when`(RealmCore::class.java) 
     RealmCore.loadLibrary(Matchers.any(Context::class.java)) 
     `when`(Realm.getDefaultInstance()).thenReturn(realmMock) 

     mockRealmResults = PowerMockito.mock(RealmResults::class.java) as RealmResults<Item> 

     val mockQuery = PowerMockito.mock(RealmQuery::class.java) 
     `when`(realmMock.where(Item::class.java)).thenReturn(mockQuery as RealmQuery<Item>) 
     `when`(mockQuery.findFirst()).thenReturn(mockResults[0]) 
     `when`(mockQuery.findAll()).thenReturn(mockRealmResults) 

     `when`(mockRealmResults.iterator()).thenReturn(mockResults.iterator()) 
     `when`(mockRealmResults.size).thenReturn(mockResults.size) 


    } 

    @Test 
    fun realm_transaction_action_successfully_committed() { 
     val testReducer = ReducerFn<TestState> { state, action -> 
      if (action is RealmTransactionAction.Committed) { 
       if (action.payloadType == Item::class.java.canonicalName) { 
        assertThat(action.payload as Item, sameInstance(mockResults[0])) 
       } 
      } 
      state 
     } 
     val store = SimpleStore(TestState(), testReducer).applyMiddleware(RealmMiddleware()) 

     val transaction: (Realm) -> Item = { 
      it.copyToRealm(mockRealmResults[0]) 
     } 

     val action = RealmTransactionAction.create(transaction = transaction) 
     store.dispatch(action) 

     verify(realmMock, times(1)).executeTransaction(Mockito.any()) 
     verify(realmMock, times(1)).close() 
    } 

    @RealmClass 
    open class Item() : RealmObject() { 
     open var title: String = "" 
    } 
} 

Answer 1

testCompile 'org.powermock:powermock-module-junit4:1.6.5' 
testCompile 'org.powermock:powermock-module-junit4-rule:1.6.5' 
testCompile 'org.powermock:powermock-api-mockito:1.6.5' 
testCompile 'org.powermock:powermock-classloading-xstream:1.6.5'