Failing unit tests in Feign core

[trumpetinc]

I'm running Feign Core unit tests on Windows platform, Java SE 21 (OpenJDK) and finding test failures.

These two appear to be actual functional problems:

1. feign.DefaultContractInheritanceTest.overrideParameterizedApiSupported()
2. feign.DefaultContractInheritanceTest.multipleInheritanceDoneCorrectly2()

Both failures look like this:

java.lang.IllegalStateException: Method OverrideParameterizedApi#get(String) not annotated with HTTP method type (ex. GET, POST)
Warnings:

• Class OverrideParameterizedApi has no annotations, it may affect contract Default
  at feign.Util.checkState(Util.java:121)
  at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:117)
  at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:71)
  at feign.DeclarativeContract.parseAndValidateMetadata(DeclarativeContract.java:40)
  at feign.DefaultContractInheritanceTest.overrideParameterizedApiSupported(DefaultContractInheritanceTest.java:88)
  at java.base/java.lang.reflect.Method.invoke(Method.java:580)
  at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
  at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)

Less important, but all 3 tests in this test unit are failing:

3. feign.MultipleLoggerTest

Failure is: org.junit.platform.commons.JUnitException: Failed to close extension context

I believe that these 3 failures are because JUL is grabbing file locks, which prevents JUnit from cleaning up it's temp folders under Windows. One solution would be to add a close() method to JavaLogger...