Espresso 中错误线程的领域访问

Question

在每次浓缩咖啡测试之前，我有一个注释 @Before，我在其中初始化我的 RealmManager.realm。

我的代码片段 object Realm:

init {
    Realm.init(SaiApplication.context)
    val builder = RealmConfiguration.Builder().schemaVersion(SCHEMA_VERSION)
    builder.migration(runMigrations())
    if (!BuildConfig.DEBUG) builder.encryptionKey(getOrCreateDatabaseKey())
    if (SaiApplication.inMemoryDatabase) builder.inMemory()
    Realm.setDefaultConfiguration(builder.build())
    try {
        errorOccurred = false
        realm = Realm.getDefaultInstance()
    } catch (e: Exception) {
        errorOccurred = true
        realm = Realm.getInstance(RealmConfiguration.Builder()
                .schemaVersion(SCHEMA_VERSION).name(errorDbName).build())
        e.log()
        deleteRealmFile(realm.configuration.realmDirectory)
    }
}

但是当我运行我的测试时，我得到下一个错误：

Realm access from incorrect thread. Realm objects can only be accessed on the thread they were created

那么我如何才能在我的测试中正确地初始化我的领域？

我发现其中一个 solutions 很有趣，创建一个假的 init 领域。

Answer 1

要从 UI 测试中操作 UI 线程的 Realm 实例，您需要使用 instrumentation.runOnMainSync(() -> {...});.[=12 在 UI 线程上初始化 Realm 实例=]

@Before
public void setup() {
    Instrumentation instrumentation = InstrumentationRegistry.getInstrumentation();
    instrumentation.runOnMainSync(new Runnable() {
        @Override
        public void run() {
           // setup UI thread Realm instance configuration
        }
    });
}

Answer 2

我做什么。我刚刚在我的 AppTools 中添加了下一个功能，它通过测试检查包：

fun isTestsSuite() = AppResources.appContext?.classLoader.toString().contains("tests")

然后修改了Realm的初始化：

 init {
    Realm.init(AppResources.appContext)
    val builder = RealmConfiguration.Builder().schemaVersion(SCHEMA_VERSION)
    builder.migration(runMigrations())
    if (!isTestsSuite()) builder.encryptionKey(getOrCreateDatabaseKey()) else builder.inMemory()
    Realm.setDefaultConfiguration(builder.build())
    try {
        errorOccurred = false
        realm = Realm.getDefaultInstance()
    } catch (e: Exception) {
        errorOccurred = true
        realm = Realm.getInstance(RealmConfiguration.Builder()
                .schemaVersion(SCHEMA_VERSION).name(errorDbName).build())
        e.log()
        deleteRealmFile(realm.configuration.realmDirectory)
    }
}

Espresso 中错误线程的领域访问

Realm access from incorrect thread in Espresso

multithreading

android

realm

kotlin

android-espresso