Testing a Parcelable class implemented with @parcelize

ParcelTesting.kt

inline fun <reified T> T.forceParcel(): T? where T : Parcelable {
    val bytes = Parcel.obtain().use {
        writeParcelable(this@forceParcel, 0)
        marshall()
    }
    return Parcel.obtain().use {
        unmarshall(bytes, 0, bytes.size)
        setDataPosition(0)
        readParcelable(T::class.java.classLoader)
    }
}

inline fun <reified T> Parcel.use(action: Parcel.() -> T): T {
    return try {
        action()
    } finally {
        recycle()
    }
}

@Test
fun testParcelableImplementation() {
  val thing = Thing()
  assertThat(thing.forceParcel()).isEqualTo(thing)
}