Assertj-core: Add isNullOr() for an intermediate checkpoint?

[onacit]

Summary

Is it possible to add, or do we already have, a functionality such as isNullOr() for an intermediate checkpoint?

Example

Note that this is not related to DB regardless the example code.

final MyEntity entity = new MyEntity();
entityManager().persist(entity);

// at this point, the createdBy attribute may be or may not be null
assertThat(entity.getCreatedBy())
        .isNullOr() // stops here when the value is null.
        .isEqualsTo("John");

// or
assertThat(entity.getCreatedBy())
        .isNullOr(a -> { // with an assert; or with the assert
            // a.isNotNull(); // obviously!
            a.isEqualsTo("John");
        });

[joel-costigliola]

Nothing specific like that but you have the more generic satisfiesAny which basically works like:

TolkienCharacter frodo = new TolkienCharacter("Frodo", HOBBIT);

 Consumer<TolkienCharacter> isHobbit = tolkienCharacter -> assertThat(tolkienCharacter.getRace()).isEqualTo(HOBBIT);
 Consumer<TolkienCharacter> isElf = tolkienCharacter -> assertThat(tolkienCharacter.getRace()).isEqualTo(ELF);

 // assertion succeeds:
 assertThat(frodo).satisfiesAnyOf(isElf, isHobbit);

In your case it would look like:

assertThat(entity.getCreatedBy()).satisfiesAnyOf(
    createdBy -> assertThat(createdBy).isNull(),
    createdBy -> assertThat(createdBy).isNotNull().isEqualsTo(John)
);

Not as elegant as isNullOr but does the job. (isNullOr could be renamed as isNullOrSatisfies btw)

[onacit]

@joel-costigliola Thank you. This can be closed and I'm doing it.