Question

我花了很多时间找到一种在android活动中模拟Koin bean的聪明方法。不幸的是，没有人满意……直到koin-1.0.0-alpha22推出

感谢@arnaudgiuliani。

希望这会有所帮助帕特里斯（Patrice）

Answer 1

此示例演示了如何在androidTest中使用koinclarifyMock（）捕获然后调用作为一个模拟bean的参数给出的lambda。

class CastManager() : ICastManager {
    private val devices = HashMap<String, Device>()

    init {
        devices["MyDevice"] = Device("MyDevice", "0000")
    }

    override fun getDevices(onSuccess: (List<Device>) -> Unit, onError: (Int) -> Unit){
        onSuccess(devices.values as List<Device>)
    }
}

主要活动的onCreate中需要一个castManager实例。

class MainActivity: AppCompatActivity() {

    private val castManager by inject<ICastManager>()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        setSupportActionBar(toolbar)

        castManager.getDevices(
                        {devices: List<Device> -> onSuccess(devices)},
                        {error: Int -> onError(error)} )

        fab.setOnClickListener { view ->
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show()
        }
    }
...

像这样，真实的bean像往常一样被声明...

val applicationModules = listOf(
        module {
            single() { CastManager() as ICastManager }
        }
)

koin由应用程序启动

open class MyApplication: Application() {

    override fun onCreate() {
        startKoin(this, applicationModules, logger = if (BuildConfig.DEBUG) AndroidLogger() else EmptyLogger())
        super.onCreate()
    }
}

自koin-1.0.0-alpha23起，我们可以使用clarifyMock（）注入模拟实例

@RunWith(AndroidJUnit4::class)
class MainActivityTest: KoinTest {

    val myBeanToMock: ICastManager by inject()

    @Rule
    @JvmField
    //As interaction with mock starts in activity's onCreate we can't launch it before mock configuration
    val rule = object : ActivityTestRule<MainActivity>(MainActivity::class.java, false, false) {}

    @Before
    fun setUp() {
        loadKoinModules(applicationModules)
        declareMock<ICastManager>()
    }

    @After
    fun tearDown() {
        rule.finishActivity()
        closeKoin()
    }

    @Test
    fun verifyMockInjection() {
        // We want to capture lambda callbacks given as argument to the mock to interact with it's caller

        doAnswer {
            //arguments[0] is the onSuccess method
            @Suppress("UNCHECKED_CAST")
            (it.arguments[0] as (List<Device>) -> Unit).invoke(listOf(Device("myMockedDevice", "2000")))
        }.whenever(myBeanToMock).getDevices(any(), any())

        rule.launchActivity(null)
        BaristaVisibilityAssertions.assertDisplayed(R.string.my_mocked_device)
    }
}

Koin版本1.0.0-alpha22中的

createMock（）被clarifyMock替换，以避免与Mockito的createMock冲突

如何在android活动测试中模拟koin注入的bean并捕获作为此模拟参数指定的lambda？

1 个答案: