Implement extracting/contains assertions

AssertJ has really powerful extracting/contains mechanism. See: http://joel-costigliola.github.io/assertj/assertj-core-features-highlight.html Section: Assertions on extracted properties/fields of iterable/array elements

I think it worth to implement similar/same for fluent part of the library. I think we can just add assertJ core as a dependency and implement extracting method which returns: “AbstractListAssert” and we’ll just leverage assertions they have. In the end we’ll have something like: JsonFluentAssert.assertThatJson(jsonResponse.getBody().getObject()) .node("data").isPresent().isArray().ofLength(3) .extracting(“name”, “age”, “race.name”) .contains(tuple(“Boromir”, 37, “Man”), tuple(“Sam”, 38, “Hobbit”), tuple(“Legolas”, 1000, “Elf”));

What do you think? If you are agree and like the idea, I can work on it.

[lukas-krecan]

I have started to play with it see https://github.com/lukas-krecan/JsonUnit/pull/102

[eximius313]

It works! Although in perfect world this:

myAssertion.and(
    a -> a.node("name").isString().isEqualTo(name), 
    a -> a.node("street").isString().isEqualTo(street)
);

could coexist together with this:

myAssertion.
    .node("name", a -> a.isString().isEqualTo(name))
    .node("street", a -> a.isString().isEqualTo(street))

but having just one is 100 times better than nothing 😉

Thank you!