infix fun <T : Any> Expect<T?>.toBeNullIfNullGivenElse(assertionCreatorOrNull: (Expect<T>.() -> Unit)?): Expect<T?>
Expects that the subject of the assertion is either null in case assertionCreatorOrNull
is null or is not null and holds all assertions assertionCreatorOrNull creates.
AssertionError - Might throw an AssertionError if the assertion made is not correct.
Return
An Expect for the current subject of the assertion.