How to use UiController class of android.support.test.espresso package

1package net.radityalabs.contactapp2import android.app.Activity3import android.app.Instrumentation4import android.os.Build5import android.support.test.espresso.UiController6import android.support.test.espresso.ViewAction7import android.support.test.espresso.contrib.RecyclerViewActions8import android.support.test.espresso.intent.rule.IntentsTestRule9import android.support.test.filters.LargeTest10import android.support.test.rule.ActivityTestRule11import android.support.test.runner.AndroidJUnit412import android.view.View13import net.radityalabs.contactapp.data.network.response.ContactListResponse14import net.radityalabs.contactapp.presentation.ui.activity.ContactDetailActivity15import net.radityalabs.contactapp.presentation.ui.activity.ContactListActivity16import net.radityalabs.contactapp.presentation.ui.fragment.ContactDetailFragment17import net.radityalabs.contactapp.presentation.util.PhoneUtil18import net.radityalabs.contactapp.test.DrawableMatcher19import net.radityalabs.contactapp.test.FragmentTestRule20import org.hamcrest.Matcher21import org.junit.Before22import org.junit.Rule23import org.junit.Test24import org.junit.runner.RunWith25import android.support.test.espresso.Espresso.onView26import android.support.test.espresso.action.ViewActions.closeSoftKeyboard27import android.support.test.espresso.assertion.ViewAssertions.matches28import android.support.test.espresso.intent.Intents.intending29import android.support.test.espresso.intent.matcher.IntentMatchers.toPackage30import android.support.test.espresso.matcher.ViewMatchers.isDisplayed31import android.support.test.espresso.matcher.ViewMatchers.withId32import android.support.test.espresso.matcher.ViewMatchers.withText33import net.radityalabs.contactapp.test.ViewAction.setTextInTextView34/**35 * Created by radityagumay on 4/19/17.36 */37@RunWith(AndroidJUnit4::class)38@LargeTest39class ContactDetailFragmentTest {40    @Rule41    var mContactDetailFragmentRule = FragmentTestRule<ContactDetailFragment>(ContactDetailFragment::class.java)42    @Rule43    var mContactListRule = ActivityTestRule<ContactListActivity>(ContactListActivity::class.java)44    @Rule45    var mContactDetailRule = IntentsTestRule<ContactDetailActivity>(ContactDetailActivity::class.java, true, false)46    @Before47    fun setup() {48        startActivity()49    }50    @Test51    fun fragment_can_be_instantiated() {52        onView(withId(R.id.container)).check(matches(isDisplayed()))53    }54    @Test55    fun is_view_available() {56        onView(withId(R.id.rv_info)).check(matches(isDisplayed()))57        onView(withId(R.id.toolbar)).check(matches(isDisplayed()))58        onView(withId(R.id.tv_full_name)).check(matches(isDisplayed()))59        onView(withId(R.id.iv_image)).check(matches(isDisplayed()))60    }61    @Test62    fun is_widget_filled() {63        onView(withId(R.id.tv_full_name)).perform(setTextInTextView(STRING_TO_BE_TYPED), closeSoftKeyboard())64        onView(withId(R.id.tv_full_name)).check(matches(withText(STRING_TO_BE_TYPED)))65        onView(withId(R.id.iv_image)).check(matches(withDrawable(R.mipmap.ic_betty_allen)))66    }67    @Test68    fun send_sms_test() {69        val result = Instrumentation.ActivityResult(Activity.RESULT_OK, PhoneUtil.sms(PHONE_NUMBER))70        intending(toPackage(PACKAGE_ANDROID_DIALER)).respondWith(result)71        onView(withId(R.id.rv_info)).perform(RecyclerViewActions72                .actionOnItemAtPosition<ViewHolder>(0, object : ViewAction {73                    override fun getConstraints(): Matcher<View>? {74                        return null75                    }76                    override fun getDescription(): String {77                        return "Click on specific button"78                    }79                    override fun perform(uiController: UiController, view: View) {80                        val v = view.findViewById(R.id.iv_right_icon)81                        v.performClick()82                    }83                }))84    }85    @Test86    fun calling_test() {87        val result = Instrumentation.ActivityResult(Activity.RESULT_OK, PhoneUtil.call(PHONE_NUMBER))88        intending(toPackage(PACKAGE_ANDROID_DIALER)).respondWith(result)89        onView(withId(R.id.rv_info)).perform(RecyclerViewActions90                .actionOnItemAtPosition<ViewHolder>(0, object : ViewAction {91                    override fun getConstraints(): Matcher<View>? {92                        return null93                    }94                    override fun getDescription(): String {95                        return "Click on specific button"96                    }97                    override fun perform(uiController: UiController, view: View) {98                        val v = view.findViewById(R.id.iv_left_icon)99                        v.performClick()100                    }101                }))102    }103    private fun startActivity(): ContactDetailActivity {104        return mContactDetailRule.launchActivity(105                ContactDetailActivity.navigateTest(mContactListRule.activity, contactListResponse()))106    }107    private fun contactListResponse(): ContactListResponse {108        val obj = ContactListResponse()109        obj.id = 1110        obj.firstName = "adit"111        obj.lastName = "gumay"...

...16package com.example.android.pictureinpicture17import android.content.pm.ActivityInfo18import android.support.test.InstrumentationRegistry19import android.support.test.espresso.Espresso.onView20import android.support.test.espresso.UiController21import android.support.test.espresso.ViewAction22import android.support.test.espresso.action.ViewActions.click23import android.support.test.espresso.assertion.ViewAssertions.matches24import android.support.test.espresso.matcher.ViewMatchers.isAssignableFrom25import android.support.test.espresso.matcher.ViewMatchers.isDisplayed26import android.support.test.espresso.matcher.ViewMatchers.withId27import android.support.test.rule.ActivityTestRule28import android.support.test.runner.AndroidJUnit429import android.view.View30import com.example.android.pictureinpicture.widget.MovieView31import org.hamcrest.Description32import org.hamcrest.Matcher33import org.hamcrest.Matchers.not34import org.hamcrest.TypeSafeMatcher35import org.hamcrest.core.AllOf.allOf36import org.junit.Assert.assertNotNull37import org.junit.Assert.assertThat38import org.junit.Assert.assertTrue39import org.junit.Rule40import org.junit.Test41import org.junit.runner.RunWith42@RunWith(AndroidJUnit4::class)43class MainActivityTest {44    @Rule @JvmField45    val rule = ActivityTestRule(MainActivity::class.java)46    @Test47    fun movie_playingOnPip() {48        // The movie should be playing on start49        onView(withId(R.id.movie))50                .check(matches(allOf(isDisplayed(), isPlaying())))51                .perform(showControls())52        // Click on the button to enter Picture-in-Picture mode53        onView(withId(R.id.minimize)).perform(click())54        InstrumentationRegistry.getInstrumentation().waitForIdleSync()55        // The Activity is paused. We cannot use Espresso to test paused activities.56        rule.runOnUiThread {57            // We are now in Picture-in-Picture mode58            assertTrue(rule.activity.isInPictureInPictureMode)59            val view = rule.activity.findViewById<MovieView>(R.id.movie)60            assertNotNull(view)61            // The video should still be playing62            assertTrue(view.isPlaying)63        }64    }65    @Test66    fun movie_pauseAndResume() {67        // The movie should be playing on start68        onView(withId(R.id.movie))69                .check(matches(allOf(isDisplayed(), isPlaying())))70                .perform(showControls())71        // Pause72        onView(withId(R.id.toggle)).perform(click())73        onView(withId(R.id.movie)).check(matches(not(isPlaying())))74        // Resume75        onView(withId(R.id.toggle)).perform(click())76        onView(withId(R.id.movie)).check(matches(isPlaying()))77    }78    @Test79    fun fullscreen_enabledOnLandscape() {80        rule.runOnUiThread { rule.activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE }81        InstrumentationRegistry.getInstrumentation().waitForIdleSync()82        rule.runOnUiThread {83            val decorView = rule.activity.window.decorView84            assertThat(decorView.systemUiVisibility,85                    hasFlag(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN))86        }87    }88    @Test89    fun fullscreen_disabledOnPortrait() {90        rule.runOnUiThread {91            rule.activity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT92        }93        InstrumentationRegistry.getInstrumentation().waitForIdleSync()94        rule.runOnUiThread {95            val decorView = rule.activity.window.decorView96            assertThat(decorView.systemUiVisibility,97                    not(hasFlag(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)))98        }99    }100    private fun isPlaying(): Matcher<View> {101        return object : TypeSafeMatcher<View>() {102            override fun matchesSafely(view: View): Boolean {103                return (view as MovieView).isPlaying104            }105            override fun describeTo(description: Description) {106                description.appendText("MovieView is playing")107            }108        }109    }110    private fun showControls(): ViewAction {111        return object : ViewAction {112            override fun getConstraints(): Matcher<View> {113                return isAssignableFrom(MovieView::class.java)114            }115            override fun getDescription(): String {116                return "Show controls of MovieView"117            }118            override fun perform(uiController: UiController, view: View) {119                uiController.loopMainThreadUntilIdle()120                (view as MovieView).showControls()121                uiController.loopMainThreadUntilIdle()122            }123        }124    }125    private fun hasFlag(flag: Int): Matcher<in Int> {126        return object : TypeSafeMatcher<Int>() {127            override fun matchesSafely(i: Int?): Boolean {128                return i?.and(flag) == flag129            }130            override fun describeTo(description: Description) {131                description.appendText("Flag integer contains " + flag)132            }...

1package ru.ltst.u2020mvp.util2import android.support.test.espresso.PerformException3import android.support.test.espresso.UiController4import android.support.test.espresso.ViewAction5import android.support.test.espresso.action.GeneralLocation6import android.support.test.espresso.action.GeneralSwipeAction7import android.support.test.espresso.action.Press8import android.support.test.espresso.action.Swipe9import android.support.test.espresso.matcher.ViewMatchers.isRoot10import android.support.test.espresso.matcher.ViewMatchers.withId11import android.support.test.espresso.util.HumanReadables12import android.support.test.espresso.util.TreeIterables13import android.view.View14import org.hamcrest.CoreMatchers.any15import org.hamcrest.Matcher16import java.util.concurrent.TimeoutException17object ViewActions {18    /**19     * Perform action of waiting for a specific view id.20     *21     *22     * E.g.:23     * onView(isRoot()).perform(waitId(R.id.dialogEditor, Sampling.SECONDS_15));24     * @param viewId25     * *26     * @param millis27     * *28     * @return29     */30    fun waitId(viewId: Int, millis: Long): ViewAction {31        return object : ViewAction {32            override fun getConstraints(): Matcher<View> {33                return isRoot()34            }35            override fun getDescription(): String {36                return "wait for a specific view with id <$viewId> during $millis millis."37            }38            override fun perform(uiController: UiController, view: View) {39                uiController.loopMainThreadUntilIdle()40                val startTime = System.currentTimeMillis()41                val endTime = startTime + millis42                val viewMatcher = withId(viewId)43                do {44                    for (child in TreeIterables.breadthFirstViewTraversal(view)) {45                        // found view with required ID46                        if (viewMatcher.matches(child)) {47                            return48                        }49                    }50                    uiController.loopMainThreadForAtLeast(50)51                } while (System.currentTimeMillis() < endTime)52                // timeout happens53                throw PerformException.Builder().withActionDescription(this.description).withViewDescription(HumanReadables.describe(view)).withCause(TimeoutException()).build()54            }55        }56    }57    /**58     * Perform action of waiting for a specific time. Useful when you need59     * to wait for animations to end and Espresso fails at waiting.60     *61     *62     * E.g.:63     * onView(isRoot()).perform(waitAtLeast(Sampling.SECONDS_15));64     * @param millis65     * *66     * @return67     */68    fun waitAtLeast(millis: Long): ViewAction {69        return object : ViewAction {70            override fun getConstraints(): Matcher<View> {71                return any(View::class.java)72            }73            override fun getDescription(): String {74                return "wait for at least $millis millis."75            }76            override fun perform(uiController: UiController, view: View) {77                uiController.loopMainThreadUntilIdle()78                uiController.loopMainThreadForAtLeast(millis)79            }80        }81    }82    fun swipeTop(): ViewAction {83        return GeneralSwipeAction(Swipe.FAST, GeneralLocation.BOTTOM_CENTER, GeneralLocation.TOP_CENTER, Press.FINGER)84    }85    fun swipeBottom(): ViewAction {86        return GeneralSwipeAction(Swipe.FAST, GeneralLocation.TOP_CENTER, GeneralLocation.BOTTOM_CENTER, Press.FINGER)87    }88    /**89     * Perform action of waiting until UI thread is free.90     *91     *92     * E.g.:93     * onView(isRoot()).perform(waitUntilIdle());94     * @return95     */96    fun waitUntilIdle(): ViewAction {97        return object : ViewAction {98            override fun getConstraints(): Matcher<View> {99                return any(View::class.java)100            }101            override fun getDescription(): String {102                return "wait until UI thread is free"103            }104            override fun perform(uiController: UiController, view: View) {105                uiController.loopMainThreadUntilIdle()106            }107        }108    }109    fun withCustomConstraints(action: ViewAction, constraints: Matcher<View>): ViewAction {110        return object : ViewAction {111            override fun getDescription(): String {112                return action.description113            }114            override fun getConstraints(): Matcher<View> {115                return constraints;116            }117            override fun perform(uiController: UiController, view: View) {118                action.perform(uiController, view)119            }120        }121    }122}...

1package eu.caraus.appsflastfm.testUtils.views2import android.support.test.espresso.contrib.RecyclerViewActions.scrollToPosition3import android.support.v7.widget.RecyclerView4import android.support.test.espresso.UiController5import android.support.test.espresso.matcher.ViewMatchers6import android.support.test.espresso.ViewAction7import android.support.test.espresso.util.HumanReadables8import android.support.test.espresso.PerformException9import android.support.annotation.IdRes10import android.support.test.espresso.Espresso11import android.support.test.espresso.assertion.ViewAssertions12import android.support.test.espresso.matcher.ViewMatchers.isAssignableFrom13import android.support.test.espresso.matcher.ViewMatchers.isDisplayed14import android.view.View15import org.hamcrest.*16import org.hamcrest.Matchers.allOf17object RecyclerViewUtils {18    fun <VH : RecyclerView.ViewHolder> actionOnItemViewAtPosition( position:Int, @IdRes viewId:Int, viewAction:ViewAction):ViewAction {19        return ActionOnItemViewAtPositionViewAction<VH>(position, viewId, viewAction)20    }21    fun recyclerViewItemsCount(@IdRes RecyclerViewId: Int): Int {22        var COUNT = 023        val matcher = object : TypeSafeMatcher<View>() {24            override fun matchesSafely(item: View): Boolean {25                COUNT = (item as RecyclerView).adapter.itemCount26                return true27            }28            override fun describeTo(description: Description) {29            }30        }31        Espresso.onView(CoreMatchers.allOf(ViewMatchers.withId(RecyclerViewId), isDisplayed())).check(ViewAssertions.matches(matcher))32        val result = COUNT33        COUNT = 034        return result35    }36    class ActionOnItemViewAtPositionViewAction<VH : RecyclerView.ViewHolder>37    ( private val position:Int,38      @param:IdRes private val viewId:Int,39      private val viewAction:ViewAction )40        : ViewAction {41        override fun getConstraints(): Matcher<View> {42            return allOf( isAssignableFrom(RecyclerView::class.java), isDisplayed() )43        }44        override fun getDescription():String {45            return ("actionOnItemAtPosition performing ViewAction: " + this.viewAction.description + " on item at position: " + this.position)46        }47        override fun perform(uiController:UiController, view:View) {48            val recyclerView = view as RecyclerView49            ScrollToPositionViewAction(this.position).perform( uiController, view)50            uiController.loopMainThreadUntilIdle()51            val targetView = recyclerView.getChildAt(this.position).findViewById<View>(this.viewId)52            if (targetView == null)53            {54                throw PerformException.Builder().withActionDescription(this.toString())55                        .withViewDescription(56                                HumanReadables.describe(view))57                        .withCause(IllegalStateException(58                                "No view with id "59                                        + this.viewId60                                        + " found at position: "61                                        + this.position))62                        .build()63            }64            else65            {66                this.viewAction.perform(uiController, targetView)67            }68        }69    }70    class ScrollToPositionViewAction (71            private val position : Int )72        : ViewAction {73        override fun getConstraints():Matcher<View> {74            return allOf( isAssignableFrom(RecyclerView::class.java), isDisplayed() )75        }76        override fun getDescription():String {77            return "scroll RecyclerView to position: " + this.position78        }79        override fun perform(uiController:UiController, view:View) {80            val recyclerView = view as RecyclerView81            recyclerView.scrollToPosition(this.position)82        }83    }84    fun withRecyclerView( recyclerViewId : Int) : RecyclerViewMatcher {85        return RecyclerViewMatcher(recyclerViewId)86    }87}...

1package br.com.concretesolutions.kappuccino.custom.recyclerView2import android.support.annotation.IdRes3import android.support.test.espresso.NoMatchingViewException4import android.support.test.espresso.PerformException.Builder5import android.support.test.espresso.UiController6import android.support.test.espresso.ViewAction7import android.support.test.espresso.ViewAssertion8import android.support.test.espresso.action.ViewActions9import android.support.test.espresso.matcher.ViewMatchers10import android.support.test.espresso.util.HumanReadables11import android.support.v7.widget.RecyclerView12import android.view.View13import org.hamcrest.Matcher14import org.hamcrest.Matchers15internal object RecyclerViewItemInteractions {16    internal const val rootViewId = -117    internal fun actionOnItemViewAtPosition(position: Int, @IdRes viewId: Int, viewAction: ViewAction): ViewAction {18        return ActionOnItemViewAtPositionViewAction(position, viewId, viewAction)19    }20    internal fun assertionOnItemViewAtPosition(position: Int, @IdRes viewId: Int = rootViewId, viewAssertion: ViewAssertion): ViewAssertion {21        return AssertionOnItemViewAtPosition(position, viewId, viewAssertion)22    }23    private class ActionOnItemViewAtPositionViewAction (24            private val position: Int,25            @IdRes private val viewId: Int,26            private val viewAction: ViewAction) : ViewAction {27        override fun getConstraints(): Matcher<View> = createConstraints()28        override fun getDescription(): String {29            return "actionOnItemAtPosition performing ViewAction: ${viewAction.description} on item at position: $position"30        }31        override fun perform(uiController: UiController, view: View) {32            val recyclerView = view as RecyclerView33            ScrollToPositionViewAction(position).perform(uiController, view)34            uiController.loopMainThreadUntilIdle()35            val targetView = recyclerView.getChildAt(position).apply {36                if (viewId == rootViewId) {37                    rootView38                } else {39                    findViewById<View>(viewId)40                }41            }42            if (targetView == null) {43                throw Builder()44                        .withActionDescription(this.toString())45                        .withViewDescription(HumanReadables.describe(view))46                        .withCause(IllegalStateException("No view with id $viewId found at position: $position"))47                        .build()48            } else {49                viewAction.perform(uiController, targetView)50            }51        }52    }53    private class AssertionOnItemViewAtPosition(private val position: Int,54                                                @IdRes private val viewId: Int,55                                                private val viewAssertion: ViewAssertion) : ViewAssertion {56        override fun check(view: View?, noViewFoundException: NoMatchingViewException?) {57            val recyclerView = view as RecyclerView58            actionOnItemViewAtPosition(position, viewId, ViewActions.scrollTo())59            val childAt = recyclerView.getChildAt(position)60            val targetView = childAt.findViewById<View>(viewId)61                    ?: throw Builder().withCause(noViewFoundException).build()62            viewAssertion.check(targetView, noViewFoundException)63        }64    }65    private class ScrollToPositionViewAction(private val position: Int) : ViewAction {66        override fun getConstraints(): Matcher<View> = createConstraints()67        override fun getDescription(): String {68            return "scroll RecyclerView to position: $position"69        }70        override fun perform(uiController: UiController, view: View) {71            val recyclerView = view as RecyclerView72            recyclerView.scrollToPosition(position)73        }74    }75    private fun createConstraints() = Matchers.allOf(76            ViewMatchers.isAssignableFrom(RecyclerView::class.java), ViewMatchers.isDisplayed())77}...

1package ebanx.com.ego.utils2import android.support.test.espresso.PerformException3import android.support.test.espresso.UiController4import android.support.test.espresso.ViewAction5import android.support.test.espresso.action.CoordinatesProvider6import android.support.test.espresso.action.PrecisionDescriber7import android.support.test.espresso.action.Swiper8import android.support.test.espresso.matcher.ViewMatchers9import android.support.test.espresso.matcher.ViewMatchers.withEffectiveVisibility10import android.support.test.espresso.util.HumanReadables11import android.view.View12import android.view.ViewConfiguration13import org.hamcrest.Matcher14class CenterSwipeAction(private val swiper: Swiper,15                        private val startCoordProvide: CoordinatesProvider,16                        private val endCoordProvide: CoordinatesProvider,17                        private val precDesc: PrecisionDescriber) : ViewAction {18    override fun getConstraints(): Matcher<View> {19        return withEffectiveVisibility(ViewMatchers.Visibility.VISIBLE)20    }21    override fun getDescription(): String {22        return "swipe from middle of screen"23    }24    @Suppress("CatchRuntimeException")25    override fun perform(uiController: UiController, view: View) {26        val startCoord = startCoordProvide.calculateCoordinates(view)27        val finalCoord = endCoordProvide.calculateCoordinates(view)28        val precision = precDesc.describePrecision()29        // you could try this for several times until Swiper.Status is achieved or try count is reached30        try {31            swiper.sendSwipe(uiController, startCoord, finalCoord, precision)32        } catch (re: RuntimeException) {33            throw PerformException.Builder()34                    .withActionDescription(this.description)35                    .withViewDescription(HumanReadables.describe(view))36                    .withCause(re)37                    .build()38        }39        // ensures that the swipe has been run....

1import android.support.test.espresso.Espresso.onView2import android.support.test.espresso.UiController3import android.support.test.espresso.ViewAction4import android.support.test.espresso.matcher.ViewMatchers.*5import android.support.v7.widget.RecyclerView6import android.view.View7import org.hamcrest.Matcher8import org.hamcrest.Matchers.allOf9object CustomViewActions {10    fun getTotalItemsFromRecyclerAdapter(resId: Int): Int {11        val counts = IntArray(1) { -1 }12        onView(withId(resId)).perform(object : ViewAction {13            override fun getDescription(): String {14                return "Getting recyclerView adapter's item count"15            }16            override fun getConstraints(): Matcher<View> {17                return isAssignableFrom(RecyclerView::class.java)18            }19            override fun perform(uiController: UiController?, view: View?) {20                if (view is RecyclerView) {21                    val count = view.adapter?.itemCount22                    if (count != null)23                        counts[0] = count24                }25            }26        })27        return counts[0]28    }29    fun recyclerScrollTo(position: Int): ViewAction {30        return object : ViewAction {31            override fun getConstraints(): Matcher<View> {32                //just checking whether thew view is recyclerView and is displayed33                return allOf<View>(isAssignableFrom(RecyclerView::class.java), isDisplayed())34            }35            override fun getDescription(): String {36                return "recyclerScrollTo:"37            }38            override fun perform(uiController: UiController, view: View) {39                val recyclerView = view as RecyclerView40                recyclerView.scrollToPosition(position)41            }42        }43    }44}...

1package net.radityalabs.contactapp.test2import android.support.test.espresso.UiController3import android.view.View4import android.widget.TextView5import org.hamcrest.Matcher6import android.support.test.espresso.matcher.ViewMatchers.isAssignableFrom7import android.support.test.espresso.matcher.ViewMatchers.isDisplayed8import org.hamcrest.CoreMatchers.allOf9/**10 * Created by radityagumay on 4/19/17.11 */12object ViewAction {13    fun setTextInTextView(value: String): android.support.test.espresso.ViewAction {14        return object : android.support.test.espresso.ViewAction {15            override fun getConstraints(): Matcher<View> {16                return allOf(isDisplayed(), isAssignableFrom(TextView::class.java!!))17            }18            override fun perform(uiController: UiController, view: View) {19                (view as TextView).text = value20            }21            override fun getDescription(): String {22                return "replace text"23            }24        }25    }26}...

1import android.support.test.espresso.UiController;2import android.support.test.espresso.ViewAction;3import android.support.test.espresso.matcher.ViewMatchers;4import android.support.test.rule.ActivityTestRule;5import android.support.test.runner.AndroidJUnit4;6import android.view.View;7import org.hamcrest.Matcher;8import org.junit.Rule;9import org.junit.Test;10import org.junit.runner.RunWith;11import static android.support.test.espresso.Espresso.onView;12import static android.support.test.espresso.action.ViewActions.click;13import static android.support.test.espresso.action.ViewActions.typeText;14import static android.support.test.espresso.assertion.ViewAssertions.matches;15import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;16import static android.support.test.espresso.matcher.ViewMatchers.withId;17import static android.support.test.espresso.matcher.ViewMatchers.withText;18import static org.hamcrest.Matchers.allOf;19@RunWith(AndroidJUnit4.class)20public class MainActivityTest {21public ActivityTestRule<MainActivity> mActivityTestRule = new ActivityTestRule<>(MainActivity.class);22public void mainActivityTest() {23ViewInteraction appCompatEditText = onView(24allOf(withId(R.id.etName),25childAtPosition(26allOf(withId(R.id.content_main),27childAtPosition(28withId(android.R.id.content),29isDisplayed()));30appCompatEditText.perform(click());31appCompatEditText.perform(replaceText("Hello World"), closeSoftKeyboard());32ViewInteraction appCompatButton = onView(33allOf(withId(R.id.btnSubmit), withText("Submit"),34childAtPosition(35allOf(withId(R.id.content_main),36childAtPosition(37withId(android.R.id.content),38isDisplayed()));39appCompatButton.perform(click());40onView(withId(R.id.tvText)).check(matches(withText("Hello World")));41}42private static ViewAction replaceText(final String text) {43return new ViewAction() {44public Matcher<View> getConstraints() {45return ViewMatchers.isAssignableFrom(TextView.class);46}47public String getDescription() {48return "replace text";49}50public void perform(UiController uiController, View view) {51((TextView) view).setText(text);52}53};54}55}56public class MainActivity extends AppCompatActivity {57private EditText etName;58private Button btnSubmit;59private TextView tvText;60protected void onCreate(Bundle savedInstanceState) {61super.onCreate(savedInstanceState);62setContentView(R.layout.activity_main);63etName = (EditText) findViewById(R.id.etName);64btnSubmit = (Button) findViewById(R.id.btnSubmit);65tvText = (TextView) findViewById(R.id.tvText);

1import android.support.test.espresso.UiController;2import android.support.test.espresso.ViewAction;3import android.support.test.espresso.matcher.ViewMatchers;4import android.view.View;5import android.widget.TextView;6import org.hamcrest.Matcher;7public class TextViewAction implements ViewAction {8public Matcher<View> getConstraints() {9return ViewMatchers.isAssignableFrom(TextView.class);10}11public String getDescription() {12return "replace text";13}14public void perform(UiController uiController, View view) {15((TextView) view).setText("new text");16}17}18import android.support.test.uiautomator.UiController;19import android.support.test.uiautomator.UiObject;20import android.support.test.uiautomator.UiObjectNotFoundException;21import android.support.test.uiautomator.UiSelector;22import android.view.View;23import android.widget.TextView;24import org.hamcrest.Matcher;25public class TextViewAction implements ViewAction {26public Matcher<View> getConstraints() {27return ViewMatchers.isAssignableFrom(TextView.class);28}29public String getDescription() {30return "replace text";31}32public void perform(UiController uiController, View view) {33UiObject uiObject = new UiObject(new UiSelector().text("old text"));34try {35uiObject.setText("new text");36} catch (UiObjectNotFoundException e) {37e.printStackTrace();38}39}40}41onView(withId(R.id.textView)).check(matches(withText("new text")));42onView(withId(R.id.textView)).perform(new TextViewAction());43public class MainActivityTest {44public void testTextView() {45onView(withId(R.id.textView)).perform(new TextViewAction());46onView(withId(R.id.textView)).check(matches(withText("new text")));47}48}

1import android.support.test.espresso.UiController;2import android.support.test.espresso.ViewAction;3import android.view.View;4import org.hamcrest.Matcher;5public class CustomViewAction {6public static ViewAction setTextInTextView(final String value) {7return new ViewAction() {8public Matcher<View> getConstraints() {9return null;10}11public String getDescription() {12return "Set value in the text view";13}14public void perform(UiController uiController, View view) {15((TextView)view).setText(value);16}17};18}19}20onView(withId(R.id.editText)).perform(CustomViewAction.setTextInTextView("Amit"));