`extracting(Function...)` propagates `Object` instead of the common base type of all extractors

[xenoterracide]

`extracting(Function...)` propagates `Object` instead of the common base type of all extractors

[scordio]

I would keep it open to see if we can do something cheap like in #1551.

[joel-costigliola]

Have you given a try to extracting(String propertyOrField, InstanceOfAssertFactory) or asInstanceOf ?

Should look like

// ... import static InstanceOfAssertFactories.STRING
assertThat(v010)
        .extracting(Semver::getVersion, Semver::toString)
        .allSatisfy(o -> assertThat(o).asInstanceOf(STRING).matches("^0\\.1\\.0-SNAPSHOT-1-g\\p{XDigit}{7}$"));

[scordio]

What you're looking for is probably asInstanceOf(InstanceOfAssertFactory), as Joel already mentioned.

However, there could be a way to make extracting(Function...) and the following allSatisfy smarter, maybe with some tuning of the type parameters for cases where all the extractors produce a common type which is more specific than Object, with a strategy similar to #1551.

[xenoterracide]

both things sound great, hadn't heard of asInstanceOf before. Even less thinking about it though sounds like a better solution.

[joel-costigliola]

@xenoterracide shall we close this issue or is there something more to discuss?

[xenoterracide]

^ same