Using onData with Espresso

Question

I am trying to access a child view of a view. This is the line I am currently trying to get to work.

onData(withDesc("Description")).onChildView(withId(R.id.positive)).perform(click());

private static Matcher<Object> withDesc(String desc) {
    return onView(withContentDescription(desc));
}

But this is returning a ViewInteraction and not a Object. How do I switch this so it will work?

score 0 · Answer 1 · answered May 29 '18 at 16:03

0

This is the example usage by Google's android-testing repo

 private static DataInteraction onRow(String str) {
     return onData(hasEntry(equalTo(LongListActivity.ROW_TEXT), is(str)));
 }

answered May 29 '18 at 16:03

serv-inc

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score -2 · Accepted Answer · answered Dec 30 '13 at 21:28

-2

I would suggest finding a way to match the desired view items that you want to load using one of the Hamcrest matchers. Look at the matchers available here: https://code.google.com/p/hamcrest/wiki/Tutorial

answered Dec 30 '13 at 21:28

Amokrane Chentir

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Don't get me wrong, I agree. But how exactly would I do that? I read through these tuts and I am still struggling. – Chad Bingham Dec 30 '13 at 21:32
From what I understand, you can only use the value of your item as matching criteria (which makes sense). For example: allOf(is(instance(String.class)), equ("some value")). Not sure about the syntax, I am trying to help from a tiny screen on a train. – Amokrane Chentir Dec 30 '13 at 21:56
When I try to use Hamcrest matcher is this context, I get major syntax errors. What is wrong? – Chad Bingham Dec 30 '13 at 22:02
Sorry about the syntax. This is the correct one: allOf(is(instanceOf(String.class)), is("Americano"))) – Amokrane Chentir Dec 30 '13 at 22:05
And don't forget to make the necessary static imports for allOf, is, instanceOf – Amokrane Chentir Dec 30 '13 at 22:06
1

Try import static org.hamcrest.Matchers.*; – Amokrane Chentir Dec 30 '13 at 22:14
Well that got onData to work, but I guess I need to rephrase my question now cause I am not getting the onChildView – Chad Bingham Dec 30 '13 at 22:26
Feel free to take a look. Maybe you can still help. http://stackoverflow.com/questions/20848620/onchildview-with-espresso – Chad Bingham Dec 30 '13 at 22:38
I'll try to as soon as I can. – Amokrane Chentir Dec 30 '13 at 22:39

Using onData with Espresso

2 Answers2