room/integration-tests/kotlintestapp/src/androidTest/java/android/arch/persistence/room/integration/kotlintestapp/test/TestDatabaseTest.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 android.arch.persistence.room.integration.kotlintestapp.test

import android.arch.core.executor.testing.InstantTaskExecutorRule
import android.arch.persistence.room.Room
import android.arch.persistence.room.integration.kotlintestapp.BooksDao
import android.arch.persistence.room.integration.kotlintestapp.BooksDatabase
import android.support.test.InstrumentationRegistry
import org.junit.After
import org.junit.Before
import org.junit.Rule

abstract class TestDatabaseTest {

    @get:Rule
    var instantTaskExecutorRule = InstantTaskExecutorRule()

    protected lateinit var database: BooksDatabase
    protected lateinit var booksDao: BooksDao

    @Before
    @Throws(Exception::class)
    fun setUp() {
        database = Room.inMemoryDatabaseBuilder(InstrumentationRegistry.getContext(),
                BooksDatabase::class.java)
                // allowing main thread queries, just for testing
                .allowMainThreadQueries()
                .build()

        booksDao = database.booksDao()
    }

    @After
    @Throws(Exception::class)
    fun tearDown() {
        database.close()
    }
}