在测试用例浓缩咖啡之前清除数据库 [英] Clear database before testcase espresso

问题描述

im使用espresso清除我的应用程序中的数据库 我设置这样的活动

im using espresso to clear database in my app Im setting activity like this

@Rule
    @JvmField
    val activity = ActivityTestRule<PhotoPrinterActivity>(PhotoPrinterActivity::class.java,false,false)

这是我的before函数

And this is my before function

    @Before
    open fun setup() {
        clearDatabase()
        activity.launchActivity(null)
        // Waiting for start app success fully

    }

这是我清晰的数据库代码

And this is my clear database code

 fun clearDatabase() {
        val databaseList = InstrumentationRegistry.getInstrumentation().targetContext.databaseList()
        for (database in databaseList) {

            // when transaction rollback files exists they are always locked so we can't delete them
            if (database.contains(".db-journal")) {
                InstrumentationRegistry.getTargetContext().deleteDatabase(database)
                continue
            }

            // when using transaction write ahead logging then this db files are listed but often they don't exist
            if (database.contains(".db-wal") || database.contains(".db-shm")) {
                InstrumentationRegistry.getTargetContext().deleteDatabase(database)
                continue
            }
            Log.v("EspressoMacchiato", "deleting " + database)
            var databasePath = InstrumentationRegistry.getInstrumentation().targetContext.getDatabasePath(database)
            if (databasePath.exists()) {
                InstrumentationRegistry.getInstrumentation().targetContext.deleteDatabase(database)
            }
        }

    }

问题是当清除数据库成功并执行向数据库中添加一些数据时，

Issue is when clear database success and perform add some data into database,

android.database.sqlite.SQLiteReadOnlyDatabaseException: attempt to write a readonly database (code 1032)
at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:786)
at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)

任何人都请帮助我！非常感谢！

Anyone please help me !Thanks so much!

推荐答案

使用 @在您的意式浓缩咖啡测试中将BeforeClass 和 InstrumentationRegistry 删除数据库:

@BeforeClass
public static void beforeClass() {
    InstrumentationRegistry.getTargetContext().deleteDatabase("database_name");
}

为防止一次执行多个意式浓缩咖啡测试时出现错误，请使用 Android测试协调器.它将分别执行所有这些操作.

And to prevent bugs when executing multiple espresso tests at once, use Android Test Orchestrator. It will execute all of them separately.

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