ScalaAdapterTest is not compatible with Java 11+

[XiXiaPdx]

After introducing Java 11 HttpClient instrumentation to the agent, the ScalaAdapterTest will fail for Java 11+ test runs.

The test that fails is in the newrelic-weaver-scala module. It is ScalaAdapterTest.weaveObjectTest()

Here are some lines of the stacktrace

java.lang.IllegalAccessError: Update to static final field com.nr.weave.weavepackage.language.scala.testclasses.SomeObject$.MODULE$ attempted from a different method (<init>) than the initializer method <clinit> 
	at com.nr.weave.weavepackage.language.scala.testclasses.SomeObject$.<init>(ScalaAdapterTest.scala:62)
	at com.nr.weave.weavepackage.language.scala.testclasses.SomeObject$.<clinit>(ScalaAdapterTest.scala)
	at com.nr.weave.weavepackage.language.scala.ScalaAdapterTest.weaveObjectTest(ScalaAdapterTest.scala:32)

This test fails because of this change in the Weave.Utils class. The agent now instruments the Java 11 HttpClient so the max byte code supported with Java 11+ is version 55. This causes the test to fail.

       double jvmSpecVersion = Double.valueOf(System.getProperty("java.specification.version"));
            if (jvmSpecVersion >=11) {
                return 55;
            } else if (jvmSpecVersion >= 1.8) {
                return 52;

To reproduce, run the test (assuming it has not been disabled with annotations) from the command line at the root of the project.

./gradlew :newrelic-weaver-scala:test --tests --parallel --stacktrace -Ptest11 ScalaAdapterTest

[jasonjkeller]

Related to: #483

[jasonjkeller]

Related to #620