UnmodifiableSequencedSet not supported

[ThanksForAllTheFish]

Which version of Kotest are you using

5.8.1

Related to: #3848

Java Version 21 also introduced unmodifiable wrapper for SequencedSet

When trying to test such a reverse-ordered view with shouldContainExactly it fails with an Assertion Error.

linkedSetOf("a", "b", "c").shouldContainExactly("a", "b", "c") // succeeds
Collections.unmodifiableSequencedSet(linkedSetOf("a", "b", "c")).shouldContainExactly("c", "b", "a") // fails
Collections.unmodifiableCollection(linkedSetOf("a", "b", "c")).shouldContainExactly("c", "b", "a") // succeeds

The issue probably is that the fix for 3848 still checks for subclasses of SequencedSet (https://github.com/kotest/kotest/pull/3873/files#diff-2d15d04b11a0d4ac020e2406ffcaa01ce78d750e0222572a224b7f54e3478309R8), I guess in an attempt to be compatible with older version of Java.

What I saw in other project is to perform different checks for different versions

[mirageoasis]

think there is only two way

1. gradle 8.2.1 support java 21
2. upgrade gradle

[mirageoasis]

think there is only two way

1. gradle 8.2.1 support java 21
2. upgrade gradle

oh I found out gradle on kotest main is 8.6.1
for 8.2.1 I think it is impossible to fix but for main version I think I can support java21

[mirageoasis]

I think I can fix this issue within a week can you give me a time?

think test code will come out within a week

[Kantis]

Won't using Java 21 classes require us to use jvmTarget = 21? Basically meaning that anyone that uses Kotest needs to use Java 21?

[mirageoasis]

Won't using Java 21 classes require us to use jvmTarget = 21? Basically meaning that anyone that uses Kotest needs to use Java 21?

oh... I was not careful enough then is there any other way around? Perhaps different code based on version

[mirageoasis]

@Kantis is there some code I can look around in this repostory? dealing with different java version?

[Kantis]

What is the expected in the case of

Collections.unmodifiableSequencedSet(linkedSetOf("a", "b", "c")).shouldContainExactly("c", "b", "a") // fails

Given that linked sets retain order, and shouldContainExactly asserts for order, is it not reasonable that it fails?