Jetpack系列(十) — 测试 ，2021Android高级面试题总结

 ```

Room 测试

1. 在androidTest 文件夹下新建测试类```
   @RunWith(AndroidJUnit4::class)
   class WordDaoTest {
   private lateinit var database: AppDataBase
   private lateinit var wordDao: WordDao

   private val word1 = Word("hello")
   private val word2 = Word("world")
   
   @get:Rule
   var instantTaskExecutorRule = InstantTaskExecutorRule()
   
   @Before
   fun createDb() = runBlocking {
       val context = InstrumentationRegistry.getInstrumentation().targetContext
       database = Room.inMemoryDatabaseBuilder(context, AppDataBase::class.java).build()
       wordDao = database.wordDao()
   
       wordDao.insertAll(listOf(word1, word2))
   }
   
   @After
   fun closeDb() {
       database.close()
   }
   
   @Test
   fun testGetAlphabetizedWords() = runBlocking {
       val wordList = wordDao.getAlphabetizedWords().first()
       Assert.assertThat(wordLi