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kotlinlang

```package com.view9.legalremit.ui.login

import androidx.test.core.app.ActivityScenario
import androidx.test.espresso.Espresso.onView
import androidx.test.espresso.assertion.ViewAssertions.matches
import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
import androidx.test.espresso.matcher.ViewMatchers.withId
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.internal.runner.junit4.AndroidJUnit4ClassRunner
import com.view9.legalremit.R
import org.junit.Test
import org.junit.runner.RunWith


@RunWith(AndroidJUnit4::class)
class LoginActivityUiTest{

    @Test
    fun is_ActivityInView() {
        val activityScenario = ActivityScenario.launch(LoginActivity::class.java)

        onView(withId(R.id.container)).check(matches(isDisplayed()))

    }
}```
Above is my first Expresso test to check if an activity is in View.  R.id.container here container is the id of the root layout of the Login Xml . But when i test it on my real Android device it fails with error: androidx.test.espresso.NoMatchingViewException: No views in hierarchy found matching: with id is &lt;com.view9.legalremit:id/container&gt; . What am i doing wrong ?

Nevermind used Thread.sleep to delay and fix