找不到com.application.unittest.data.local.local.shoppingitemdatabase的实现。 shoppitiTemdatabase_impl不存在

Question

我对房间测试有问题，我检查了所有Stackoverflow解决方案，但对我没有任何帮助。 我是测试的初学者。 我尝试了很多解决方案，例如更改kapt，并为房间添加其他库

这是错误：

java.lang.RuntimeException: cannot find implementation for com.application.unittest.data.local.ShoppingItemDatabase. ShoppingItemDatabase_Impl does not exist
at androidx.room.Room.getGeneratedImplementation(Room.java:100)
at androidx.room.RoomDatabase$Builder.build(RoomDatabase.java:1486)
at com.application.unittest.data.local.ShoppingDaoTest.setup(ShoppingDaoTest.kt:40)

这是我的数据库类：

@Database(entities = [ShoppingItem::class], version = 1)
abstract class ShoppingItemDatabase:RoomDatabase() {
    abstract fun shoppingDao():ShoppingDao
}

这是接口：

@Dao
interface ShoppingDao {

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insertShoppingItem(shoppingItem: ShoppingItem)

    @Delete
    suspend fun deleteShoppingItem(shoppingItem: ShoppingItem)

    @Query("SELECT * FROM shopping_items")
    fun observeAllShoppingItems():LiveData<List<ShoppingItem>>

    @Query("SELECT SUM(price * amount) FROM shopping_items")
    fun observeTotalPrice():LiveData<Float>
}

这是测试：

@ExperimentalCoroutinesApi
@RunWith(AndroidJUnit4::class)
@SmallTest
class ShoppingDaoTest {

    @get:Rule
    var instantTaskExecutorRule = InstantTaskExecutorRule()

    private lateinit var database: ShoppingItemDatabase
    private lateinit var dao: ShoppingDao

    @Before
    fun setup(){

            database = Room.inMemoryDatabaseBuilder(
                ApplicationProvider.getApplicationContext(),
                ShoppingItemDatabase::class.java
            )
                .allowMainThreadQueries()
                .build()
            dao = database.shoppingDao()

    }

    @After
    fun teardown(){
        database.close()
    }

    @Test
    fun insertShoppingItem() = runTest {
        val shoppingItem = ShoppingItem(id = 1,"name",1,2f,"image")
        dao.insertShoppingItem(shoppingItem)

        val allShoppingItems = dao.observeAllShoppingItems().getOrAwaitValue()

        assertThat(allShoppingItems).contains(shoppingItem)
    }

}

那我该怎么办？

更新：

这是我的依赖性。我想也许我错过了依赖性的东西：

implementation 'androidx.core:core-ktx:1.8.0'
implementation 'androidx.appcompat:appcompat:1.4.2'
implementation 'com.google.android.material:material:1.6.1'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'

//Material Design
implementation "com.google.android.material:material:1.6.1"

//Architectural Component
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1"

//Lifecycle
implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.4.1"
implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.4.1"
implementation "androidx.lifecycle:lifecycle-runtime:2.4.1"

//Room
implementation "androidx.room:room-runtime:2.4.2"
implementation "androidx.room:room-ktx:2.4.2"
annotationProcessor "androidx.room:room-compiler:2.4.2"
annotationProcessor "android.arch.persistence.room:compiler:1.1.1"
kapt "android.arch.persistence.room:compiler:1.1.1"
kaptAndroidTest "androidx.room:room-compiler:2.4.2"


//Kotlin extension and Coroutines for Room
implementation "androidx.room:room-ktx:2.4.2"

//Retrofit
implementation "com.squareup.retrofit2:retrofit:2.9.0"
implementation "com.squareup.retrofit2:converter-gson:2.9.0"


//Coroutines
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.1"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.1"

//Coroutines lifecycle scope
implementation "androidx.lifecycle:lifecycle-viewmodel:2.4.1"

//Navigation Component
implementation "androidx.navigation:navigation-fragment-ktx:2.4.2"
implementation "androidx.navigation:navigation-ui-ktx:2.4.2"

//Glide
implementation "com.github.bumptech.glide:glide:4.12.0"
kapt "com.github.bumptech.glide:compiler:4.12.0"

//Activity KTX for ViewModel
implementation "androidx.activity:activity-ktx:1.4.0"

//Dagger-Hilt
implementation "com.google.dagger:hilt-android:2.38.1"
kapt "com.google.dagger:hilt-android-compiler:2.38.1"
implementation "androidx.hilt:hilt-lifecycle-viewmodel:1.0.0-alpha03"
kapt "androidx.hilt:hilt-compiler:1.0.0"

//Timber
implementation "com.jakewharton.timber:timber:5.0.1"

testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

//Local Unit Test
implementation "androidx.test:core:1.4.0"
testImplementation "org.hamcrest:hamcrest-all:1.3"
testImplementation "androidx.arch.core:core-testing:2.1.0"
testImplementation "org.robolectric:robolectric:4.3.1"
testImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.1"
testImplementation "org.mockito:mockito-core:2.28.2"
testImplementation "com.google.truth:truth:1.0.1"
testImplementation "androidx.room:room-testing:2.4.2"
androidTestImplementation "com.google.truth:truth:1.0.1"

//Instrumentation Unit Test
androidTestImplementation "junit:junit:4.13.2"
androidTestImplementation "com.linkedin.dexmaker:dexmaker-mockito:2.28.1"
androidTestImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.1"
androidTestImplementation "androidx.arch.core:core-testing:2.1.0"
androidTestImplementation "com.google.truth:truth:1.0.1"
androidTestImplementation "androidx.test.ext:junit:1.1.3"
androidTestImplementation "androidx.test.espresso:espresso-core:3.4.0"
androidTestImplementation "org.mockito:mockito-core:2.28.2"

Answer 1

您是否有应用程序类来实例化房间数据库？

如果是这样，请确保您的Android清单在应用程序中具有以下代码行。

＆lt;应用
android：name =“ com.application.unittest。（然后您的应用程序类名称）”

Answer 2

我最近构建的应用程序的错误与您的错误相同，但是在将应用程序名称放在清单中后起作用。我没有使用TDD或刀柄，所以我不确定这是否会起作用。

但是我使用的应用程序类包含以下内容：

类myapplication：application（）{

val database: your database class by lazy { your database class).getDatabase(this) }

}

，然后确保应用程序名称在清单中。我希望这会有所帮助。