ObjectBox ToOne 对象仅在 Android 本地单元测试时在实体内部为空

Question

我正在尝试为我的一个存储库编写测试，但由于以下错误，我无法保存我的实体对象：

java.lang.IllegalStateException: ToOne object is null inside br.com.CalendarEvent

我的实体是这两个：

@Entity
data class CalendarEvent(
    @Id var boxId: Long = 0,

    @Index var id: String = UUID.randomUUID().toString(),

    var userId: String = "",

    var title: String = "",

    var discipline: String = "",

    var hour: Int = 1,

    var dateInEpochDay: Long = 0L,

    var isOnline: Boolean = false,

    var estimatedTime: Int = 1,

    var userAttended: Boolean? = null) {

    lateinit var nucleus: ToOne<SupportNucleus>

    lateinit var specialNeeds: ToMany<SpecialNeed>

}
@Entity
data class SupportNucleus(
@Id var boxId: Long = 0,

@Index var id: String = UUID.randomUUID().toString(),

var name: String = "",

var location: String = "",

var contact: String = "",

var phones: String = "",

var startWorkingHour: Int = 9,

var endWorkingHour: Int = 23,

@Transient var unavailableDays: List<Long> = listOf())

如您所见，这两个实体都有它们的无参数构造函数，当我保存 CalendarEvent 运行应用程序或运行仪器测试时，我工作得很好。此错误仅发生在本地单元测试

我的测试class:

class CalendarBoxRepositoryTest : BaseObjectBoxTest() {

    lateinit var subjectRepository: CalendarRepository

    var dataSourceMock: CalendarDataSource = mockk()
    var dataMapperMock: CalendarDataMapper = mockk()

    @Before
    fun setup() {
        subjectRepository = CalendarBox(dataSourceMock)
    }


    @Test
    fun save_calendar_event_correctly() {
        //Given no event was saved
        val calendarBoxBefore = store?.boxFor(CalendarEvent::class.java)
        assertEquals(0, calendarBoxBefore?.all?.size)

        val calendar = CalendarEvent(userId = "userId", title = "Title", discipline = "Discipline",
            dateInEpochDay = 123, isOnline = false, estimatedTime = 1, userAttended = null)

        val nucleus = SupportNucleus(name = "Support")


        calendar.nucleus = ToOne(calendar, CalendarEvent_.nucleus)
        calendar.nucleus.target = nucleus

        //When Saved
        runBlocking {
            subjectRepository.saveCalendarEvent(calendar)
        }

        //Verify saved correctly
        val calendarBoxAfter = store?.boxFor(CalendarEvent::class.java)
        assertEquals(1, calendarBoxAfter?.all?.size)
    }
}

当我在保存后尝试获取以断言它已正确保存顺便说一句时，实际上发生了错误。

Answer 1

尝试从 ToOne 中删除 lateinit 并立即初始化它：

@Entity
data class CalendarEvent(
...
    ) {

    var nucleus = ToOne<SupportNucleus>(this, CalendarEvent_.nucleus)

}

注意：Android 项目不再需要 ToOne/ToMany 初始化，因为 ObjectBox 1.5 或更新版本运行从 Android Studio 测试或直接运行 Gradle 任务，例如testDebugUnitTest.

检查是否像 objectboxTransformDebugUnitTest 这样的 Gradle 任务在测试任务（默认设置）之前运行。

ObjectBox ToOne 对象仅在 Android 本地单元测试时在实体内部为空

ObjectBox ToOne object is null inside entity only on Android Local Unit Testing

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one-to-one

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