Room MigrationTestHelper 已弃用

Question

我想为我的数据库迁移编写一个 JUnit 测试，如 android documentation 所说，但是在房间版本 2.4.1 MigrationTestHelper 中已弃用，是否有任何替代方法可以测试我的使用手动迁移的遗留代码？

@RunWith(AndroidJUnit4::class)
class MigrationTest {
    private val TEST_DB = "migration-test"

    // Array of all migrations
    private val ALL_MIGRATIONS = arrayOf(
        PersistenceModule.MIGRATION_7_8,
        PersistenceModule.MIGRATION_8_9,
        PersistenceModule.MIGRATION_9_10,
        PersistenceModule.MIGRATION_10_11,
        PersistenceModule.MIGRATION_11_12,
        PersistenceModule.MIGRATION_12_13,
        PersistenceModule.MIGRATION_13_14
    )

    @get:Rule
    val helper: MigrationTestHelper = MigrationTestHelper(
        InstrumentationRegistry.getInstrumentation(),
        AppDatabase::class.java.canonicalName,
        FrameworkSQLiteOpenHelperFactory()
    )

    @Test
    @Throws(IOException::class)
    fun migrateAll() {
       
        helper.createDatabase(TEST_DB, 7).apply {
            close()
        }

        Room.databaseBuilder(
            InstrumentationRegistry.getInstrumentation().targetContext,
            AppDatabase::class.java,
            TEST_DB
        ).addMigrations(*ALL_MIGRATIONS).build().apply {
            openHelper.writableDatabase.close()
        }
    }
}

Answer 1

这根本不是真的； 5 个构造函数中只有 2 个被弃用：

https://developer.android.com/reference/androidx/room/testing/MigrationTestHelper

很可能是因为：

Cannot be used to run migration tests involving AutoMigration.

Room MigrationTestHelper 已弃用

Room MigrationTestHelper is deprecated

android

android-room

android-testing