Switch to jvmDefaultStable for jvm default setting (#390)

Author: ZacSweers

CHANGELOG.md

@@ -4,6 +4,9 @@ Changelog
 **Unreleased**
 --------------
 
+- **Fix:** Don't set `jvmDefault` automatically (previously defaulted to `JvmDefaultMode.DISABLE`).
+- **Fix:** Use the new, non-deprecated `jvmDefaultStable` CLI option when setting `jvmDefault`.
+
 0.10.0
 -----
 

core/src/main/kotlin/com/tschuchort/compiletesting/KotlinCompilation.kt

@@ -163,7 +163,7 @@ class KotlinCompilation : AbstractKotlinCompilation<K2JVMCompilerArguments>() {
    * Allow to use '@JvmDefault' annotation for JVM default method support.
    * {disable|enable|compatibility}
    */
-  var jvmDefault: String = JvmDefaultMode.DISABLE.description
+  var jvmDefault: String? = null
 
   /** Generate metadata with strict version semantics (see kdoc on Metadata.extraInt) */
   var strictMetadataVersionSemantics: Boolean = false
@@ -310,7 +310,7 @@ class KotlinCompilation : AbstractKotlinCompilation<K2JVMCompilerArguments>() {
         args.supportCompatqualCheckerFrameworkAnnotations =
           supportCompatqualCheckerFrameworkAnnotations
 
-      args.jvmDefault = jvmDefault
+      args.jvmDefaultStable = jvmDefault
       args.strictMetadataVersionSemantics = strictMetadataVersionSemantics
       args.sanitizeParentheses = sanitizeParentheses