xref: /frameworks/support/room/integration-tests/kotlintestapp/src/androidTest/java/androidx/room/integration/kotlintestapp/test/LiveDataTestUtil.kt

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.room.integration.kotlintestapp.test

import androidx.lifecycle.LiveData
import androidx.lifecycle.Observer

object LiveDataTestUtil {

    @Throws(InterruptedException::class)
    fun <T> getValue(liveData: LiveData<T>): T {
        val data = arrayOfNulls<Any>(1)
        val observer = object : Observer<T> {
            override fun onChanged(o: T?) {
                data[0] = o
                liveData.removeObserver(this)
            }
        }
        liveData.observeForever(observer)

        return data[0] as T
    }
}