OnBoardingActivityUITest.kt

@RunWith(AndroidJUnit4::class)
class OnBoardingActivityUITest {
    @get:Rule
    val activityScenarioRule = activityScenarioRule<OnBoardingActivity>()

    @Test
    fun initial_state_on_boarding_screen_UI_test() {
        val titleToCheck = "On Boarding Title 1"
        onView(withText(titleToCheck)).check(matches(isDisplayed()))
        onView(withId(R.id.on_board_bottom_msg)).check(matches(isDisplayed()))
        with(onView(withId(R.id.on_board_sign_up))) {
            check(matches(isDisplayed()))
            check(matches(isEnabled()))
        }
        with(onView(withId(R.id.on_board_login))) {
            check(matches(isDisplayed()))
            check(matches(isEnabled()))
        }
        onView(withId(R.id.on_boarding_marker_container)).check(matches(isDisplayed()))
        onView(withId(R.id.on_boarding_initial_circle)).check(matches(withBackground(R.drawable.bg_green_circle)))
        onView(withId(R.id.on_boarding_view_pager)).check(matches(isDisplayed()))
    }

    @Test
    fun swipe_on_boarding_to_second_page_UI_test() {
        val titleToCheck = "On Boarding Title 2"
        onView(withId(R.id.on_boarding_view_pager)).perform(ViewActions.swipeLeft()) //page 2
        onView(withText(titleToCheck)).check(matches(isDisplayed()))
        onView(withId(R.id.on_boarding_initial_circle)).check(matches(withBackground(R.drawable.bg_gray_circle)))
        onView(withId(R.id.on_boarding_middle_circle)).check(matches(withBackground(R.drawable.bg_green_circle)))
        onView(withId(R.id.on_boarding_last_circle)).check(matches(withBackground(R.drawable.bg_gray_circle)))
    }
}