Multiple approaches to locate to a particular position of an element in Espresso when having multiple same ID

In Espresso when we have to locate to a particular position of an element and there are multiple element of having same id then we can do it by the following approaches :-

Through Custom index we can locate to an element by the index of that element.
In Recycler view when we want to locate an element where the element not having unique id.

Through Custom index we can locate to an element by the index value of that element.

In this we have to create a custom index :-

public static Matcher<View> withIndex(final Matcher<View> matcher, final int index) {
    return new TypeSafeMatcher<View>() {
        int currentIndex = 0;

        @Override
        public void describeTo(Description description) {
            description.appendText("with index: ");
            description.appendValue(index);
            matcher.describeTo(description);
        }

        @Override
        public boolean matchesSafely(View view) {
            return matcher.matches(view) && currentIndex++ == index;
        }
    };
}

public static Matcher<View> withIndex(final Matcher<View> matcher, final int index) {

return new TypeSafeMatcher<View>() {

int currentIndex = 0;

@Override

public void describeTo(Description description) {

description.appendText("with index: ");

description.appendValue(index);

matcher.describeTo(description);

}

@Override

public boolean matchesSafely(View view) {

return matcher.matches(view) && currentIndex++ == index;

}

};

}

And like this we have to use it :-

onView(withIndex(withId(R.id.button_btn), 0)).perform( click());

1	onView(withIndex(withId(R.id.button_btn), 0)).perform( click());

Here the “button_id” is the id where we want to perfom a click action and “0” is the index position of that element.

2. In Recycler view when we want to locate an element where the element not having unique id.

Then we using this class in code like this:-

 onView(withId(R.id.my_recycler_view)).perform(
                RecyclerViewActions.actionOnItemAtPosition(0, MyViewAction.clickChildViewWithId(R.id.button_id))).perform(scrollTo(),click());

1 2	onView(withId(R.id.my_recycler_view)).perform( RecyclerViewActions.actionOnItemAtPosition(0, MyViewAction.clickChildViewWithId(R.id.button_id))).perform(scrollTo(),click());

here “my_recycler_view” is the id of recycler view and “0” is the position where we want to click that button and “
button-id” is the id of the button on which we have to perform the click.

Here is the class “MyViewAction“:-

public static class MyViewAction {

    public static ViewAction clickChildViewWithId(final int id) {
        return new ViewAction() {
            @Override
            public Matcher<View> getConstraints() {
                return null;
            }

            @Override
            public String getDescription() {
                return "Click on a child view with specified id.";
            }

            @Override
            public void perform(UiController uiController, View view) {
                View v = view.findViewById(id);
                v.performClick();
            }
        };
    }

}

public static class MyViewAction {

public static ViewAction clickChildViewWithId(final int id) {

return new ViewAction() {

@Override

public Matcher<View> getConstraints() {

return null;

}

@Override

public String getDescription() {

return "Click on a child view with specified id.";

}

@Override

public void perform(UiController uiController, View view) {

View v = view.findViewById(id);

v.performClick();

}

};

}

By using this technique you can easily locate to your location When there are multiple same id buttons.

I hope this will help you when you face “multiple match” problem in Espresso.

Espresso Mobile Application Testing

S.Johnson 16 April 2019

. . .

Multiple approaches to locate to a particular position of an element in Espresso when having multiple same ID

Through Custom index we can locate to an element by the index value of that element.

2. In Recycler view when we want to locate an element where the element not having unique id.

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