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在testcase espresso之前清除数据库

android-espresso ui-automation kotlin android

Pháº¡m Thành Nam · 技术社区 · 8 年前

im使用espresso清除我应用程序中的数据库 Im设置这样的活动

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

这是我的before函数

@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

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,

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)

任何人请帮帮我!非常感谢!

3 回复 | 直到 4 年前

stedi 8 年前

使用 @BeforeClass 和 InstrumentationRegistry 在espresso测试中删除数据库:

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

为了防止一次执行多个浓缩咖啡测试时出现错误,请使用 Android Test Orchestrator . 它将分别执行所有这些操作。

HenriqueMS 5 年前

如果由于不赞成,您无法使接受的答案生效,我相信检测api已更新为: 仪器注册表 .getInstrumentation() .getTargetContext()

因此:

InstrumentationRegistry.getInstrumentation().getTargetContext().deleteDatabase("database_name")

或者,您可以获取实际的应用程序上下文(“目标”),您可以执行以下操作:

ApplicationProvider.getApplicationContext<YOUR-APPLICATION>().deleteDatabase("database_name")

Thomas Gales 6 年前

每个测试类清除一次数据库

将以下代码添加到Android测试类:

companion object {
    @BeforeClass
    fun clearDatabase() {
        InstrumentationRegistry.getInstrumentation().uiAutomation.executeShellCommand("pm clear PACKAGE_NAME").close()
    }
}

每次测试前清除数据库

在每次测试运行之前清除数据库的另一种方法是在使用 Android Test Orchestrator . 这将“在每次测试后从设备的CPU和内存中删除所有共享状态:”

将以下语句添加到项目的生成中。gradle文件:

android {
  defaultConfig {
   ...
   testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

   // The following argument makes the Android Test Orchestrator run its
   // "pm clear" command after each test invocation. This command ensures
   // that the app's state is completely cleared between tests.
   testInstrumentationRunnerArguments clearPackageData: 'true'
 }

  testOptions {
    execution 'ANDROIDX_TEST_ORCHESTRATOR'
  }
}

dependencies {
  androidTestImplementation 'androidx.test:runner:1.1.0'
  androidTestUtil 'androidx.test:orchestrator:1.1.0'
}