In this recipe, we will create a custom AssertJ assertion. Please refer to the previous recipe for the presented assertions in the test because in the current recipe, we will combine them into our custom assertions:
For this recipe, our system under test will be a NewPersonGenerator class that will call an external service, NewIdentityCreator, to generate a new identity for the current person, as shown in the following code:
public class NewPersonGenerator {
private final NewIdentityCreator newIdentityCreator;
public NewPersonGenerator(NewIdentityCreator newIdentityCreator) {
this.newIdentityCreator = newIdentityCreator;
}
public Person generateNewIdentity(Person person) {
String newName = newIdentityCreator.createNewName(person);
int newAge = newIdentityCreator.createNewAge(person);
List<Person> newSiblings = newIdentityCreator.createNewSiblings(person);
return new Person(newName...