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onData(allOf(`is`(instanceOf(Map::class.java)), hasEntry(equalTo("STR"),
        `is`("item: 50")))).perform(click())

onData(allOf(is(instanceOf(Map.class)), hasEntry(equalTo("STR"), is("item: 50"))))
    .perform(click());

hasEntry(equalTo("STR"), `is`("item: 50"))

hasEntry(equalTo("STR"), is("item: 50"))

return object : BoundedMatcher<Object, Map>(Map::class.java) {
    override fun matchesSafely(map: Map): Boolean {
        return hasEntry(equalTo("STR"), itemTextMatcher).matches(map)
    }

    override fun describeTo(description: Description) {
        description.appendText("with item content: ")
        itemTextMatcher.describeTo(description)
    }
}

return new BoundedMatcher<Object, Map>(Map.class) {
    @Override
    public boolean matchesSafely(Map map) {
        return hasEntry(equalTo("STR"), itemTextMatcher).matches(map);
    }

    @Override
    public void describeTo(Description description) {
        description.appendText("with item content: ");
        itemTextMatcher.describeTo(description);
    }
};

fun withItemContent(expectedText: String): Matcher<Object> {
    checkNotNull(expectedText)
    return withItemContent(equalTo(expectedText))
}

public static Matcher<Object> withItemContent(String expectedText) {
    checkNotNull(expectedText);
    return withItemContent(equalTo(expectedText));
}

onData(withItemContent("item: 50")).perform(click())

onData(withItemContent("item: 50")).perform(click());

onData(withItemContent("item: 60"))
    .onChildView(withId(R.id.item_size))
    .perform(click())

onData(withItemContent("item: 60"))
    .onChildView(withId(R.id.item_size))
    .perform(click());

@Test(expected = PerformException::class)
fun itemWithText_doesNotExist() {
    // Attempt to scroll to an item that contains the special text.
    onView(ViewMatchers.withId(R.id.recyclerView))
        .perform(
            // scrollTo will fail the test if no item matches.
            RecyclerViewActions.scrollTo(
                hasDescendant(withText("not in the list"))
            )
        )
}

@Test(expected = PerformException.class)
public void itemWithText_doesNotExist() {
    // Attempt to scroll to an item that contains the special text.
    onView(ViewMatchers.withId(R.id.recyclerView))
            // scrollTo will fail the test if no item matches.
            .perform(RecyclerViewActions.scrollTo(
                    hasDescendant(withText("not in the list"))
            ));
}

@Test fun scrollToItemBelowFold_checkItsText() {
    // First, scroll to the position that needs to be matched and click on it.
    onView(ViewMatchers.withId(R.id.recyclerView))
        .perform(
            RecyclerViewActions.actionOnItemAtPosition(
                ITEM_BELOW_THE_FOLD,
                click()
            )
        )

    // Match the text in an item below the fold and check that it's displayed.
    val itemElementText = "${activityRule.activity.resources
        .getString(R.string.item_element_text)} ${ITEM_BELOW_THE_FOLD.toString()}"
    onView(withText(itemElementText)).check(matches(isDisplayed()))
}

@Test
public void scrollToItemBelowFold_checkItsText() {
    // First, scroll to the position that needs to be matched and click on it.
    onView(ViewMatchers.withId(R.id.recyclerView))
            .perform(RecyclerViewActions.actionOnItemAtPosition(ITEM_BELOW_THE_FOLD,
            click()));

    // Match the text in an item below the fold and check that it's displayed.
    String itemElementText = activityRule.getActivity().getResources()
            .getString(R.string.item_element_text)
            + String.valueOf(ITEM_BELOW_THE_FOLD);
    onView(withText(itemElementText)).check(matches(isDisplayed()));
}

@Test fun itemInMiddleOfList_hasSpecialText() {
    // First, scroll to the view holder using the isInTheMiddle() matcher.
    onView(ViewMatchers.withId(R.id.recyclerView))
        .perform(RecyclerViewActions.scrollToHolder(isInTheMiddle()))

    // Check that the item has the special text.
    val middleElementText = activityRule.activity.resources
            .getString(R.string.middle)
    onView(withText(middleElementText)).check(matches(isDisplayed()))
}

@Test
public void itemInMiddleOfList_hasSpecialText() {
    // First, scroll to the view holder using the isInTheMiddle() matcher.
    onView(ViewMatchers.withId(R.id.recyclerView))
            .perform(RecyclerViewActions.scrollToHolder(isInTheMiddle()));

    // Check that the item has the special text.
    String middleElementText =
            activityRule.getActivity().getResources()
            .getString(R.string.middle);
    onView(withText(middleElementText)).check(matches(isDisplayed()));
}