Sign In error verification Android UI tests with Espresso

EspressoSignInTest.kt

@RunWith(AndroidJUnit4::class)
class EspressoSignInTest {

    @Rule @JvmField
    val activityRule = ActivityTestRule<SignInActivity>(SignInActivity::class.java)

    @Test
    fun shouldDisplaySinInErrorWhenEmailIsIncorrect() {
        val incorrectEmail = "test"

        onView(withId(R.id.email))
                .perform(replaceText(incorrectEmail), closeSoftKeyboard())

        onView(withId(R.id.signIn))
                .perform(click())

        onView(withText(R.string.error_email_should_be_valid))
                .check(matches(isDisplayed()))
    }
}