How to check list of objects one property value count using AssertJ?

Question

class Test{
private Boolean isChange;

}
Assume that tests list contains 1000 objets.

List<Test> tests = new ArrayList<Test>();
Test t  = new Test();
t.setIschange(true);
tests.add(t);

like that I have added 200 objects as true i.e isChanges value, remaining all are false out of 1000; and it will change to 300 like.

so how to check wheather list contains 200 objects isChange value is true using assertJ

Answer 1

You can use filter if you have a proper getter to access the value, or use a lambda:

assertThat(tests).filteredOn("change", true).hasSize(200);