问无法启动意图

EN

import okhttp3.mockwebserver.MockResponse
import okhttp3.mockwebserver.MockWebServer
import org.junit.After
import java.util.concurrent.TimeUnit

@RunWith(AndroidJUnit4::class)
class TradersActivityTest {
    private lateinit var mockServer: MockWebServer

    @Rule
    @JvmField
    var tradersIntentTestRule = IntentsTestRule(TradersActivity::class.java, false, false)

    @Before
    fun setup() {
        mockServer = MockWebServer()
        mockServer.start(8081)
    }

    @Test
fun hasTraders_noTradersTextView_isNotDisplayed() {
    mockServer.enqueue(MockResponse()
            .setResponseCode(200)
            .setBody(FileUtil.getStringFromFile(context, ONE_TRADER_NO_WALLETS_LIST)));
    tradersIntentTestRule.launchActivity(Intent())
    onView(withId(R.id.noTradersTextView))
            .check(matches(not(isDisplayed())))
}

    @Test
    fun toolBar_height() {
        onView(withId(R.id.toolBar))
                .check(matches(withHeightResId(R.dimen.tool_bar_height)))
    }

java.lang.RuntimeException: No activities found. Did you forget to launch the activity by calling getActivity() or startActivitySync or similar?
at androidx.test.espresso.base.RootViewPicker.waitForAtLeastOneActivityToBeResumed(RootViewPicker.java:169)
at androidx.test.espresso.base.RootViewPicker.get(RootViewPicker.java:83)

 @Before
    fun setup() {
        mockServer = MockWebServer()
        mockServer.start(8081)

        mockServer.enqueue(MockResponse()
                .setResponseCode(200)
                .setBody(FileUtil.getStringFromFile(context, ONE_TRADER_NO_WALLETS_LIST)));
        tradersIntentTestRule.launchActivity(Intent())

        Debug.d(TAG, "SUCCCESS_START_MOCKWEBSRVER")
    }

java.lang.RuntimeException: Could not launch intent Intent { flg=0x10000000 com.myproject.android.ui.activity.TradersActivity } within 45 seconds. Perhaps the main thread has not gone idle within a reasonable amount of time? There could be an animation or something constantly repainting the screen. Or the activity is doing network calls on creation? See the threaddump logs. For your reference the last time the event queue was idle before your activity launch request was 1556373134135 and now the last time the queue went idle was: 1556373143180. If these numbers are the same your activity might be hogging the event queue.
at androidx.test.runner.MonitoringInstrumentation.startActivitySync(MonitoringInstrumentation.java:459)