Object generation does not fail when setter invocation fails

[fmbenhassine]

As of v4.2, Easy Random does not fail when a setter invocation fails. Here is a quick example with a failing test:

public class Person {

    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        if (age < 0) {
            throw new IllegalArgumentException("Age must be positive");
        }
        this.age = age;
    }
}

@Test
void shouldFailIfSetterInvocationFails() {
    EasyRandom easyRandom = new EasyRandom();
    Assertions.assertThrows(ObjectCreationException.class, 
                            () -> easyRandom.nextObject(Person.class));
}

This test fails and the person instance is generated with a negative age, which is not intended by the class designer.

As a class designer, if I want to enforce some rules while setting fields to make sure my object's internal state is valid, I do not want Easy Random or any other library to bypass my setter and create invalid instances of my class, unless I explicitly tell the library to do so (with an option like bypassSetters, see #398 ).

If one wants the library to generate valid values without bypassing setters, one can register a custom randomizer for the target field. For the previous example, it could be:

EasyRandomParameters parameters = new EasyRandomParameters()
            .randomize(FieldPredicates.named("age").and(inClass(Person.class)), new IntegerRangeRandomizer(1, 150));
EasyRandom easyRandom = new EasyRandom(parameters);