[FIXED] JUnit: Is there a way to assert all array values at once?

Issue

I have a map in which its values are a simple pojo. For example (in a very loosely code):

Class Data{
  int a;
  Boolean b;
}

Map<Integer, Data> myMap = new HashMap<>();

Now the map is being populated with values. And at then end I would like to assert that all the b values of the data object of all map entries are, for example, true.

So I tried something like that:

private void computeAllBooleans(){

    allBooleansStatus = true;
    myMap.values()
        .forEach(data ->
            allBooleansStatus = allBooleansStatus && data.getB();
}

1. Is there a more concise way to achieve that?
2. Is there a way to assert it with JUnit (or other relevant frameworks like hamcrest, assertj, etc.) assertions?

(I noticed this link but didn't understand how can I use the suggested answers there...)

Solution

You can use allMatch terminal operation to check all element of map like this:

myMap.values().stream().allMatch(Data::getB);

or use filter and count it like this:

myMap.values().stream().filter(Data::getB).count() == myMap.size();

Answered By - Hadi J
Answer Checked By - Clifford M. (JavaFixing Volunteer)