Migrating Groovy to Java call site instrumentation plugin (#10462)

[G2J] call site instrumentation plugin

Migration from Groovy to Java for unit tests

restore before migration

Moving groovy to java to keep history

restore migrated files

Add script to move groovy files as java ones

address comments

address comments

add claude skill

remove script

modified SKILL

fix test

Co-authored-by: jean-philippe.bempel <jean-philippe.bempel@datadoghq.com>

Author: jpbempel

.claude/skills/migrate-groovy-to-java/SKILL.md

@@ -0,0 +1,20 @@
+---
+name: migrate-groovy-to-java
+description: migrate test groovy files to java
+---
+
+Migrate test Groovy files to Java using JUnit 5
+
+1. List all groovy files of the current gradle module
+2. convert groovy files to Java using Junit 5
+3. make sure the tests are still passing after migration
+4. remove groovy files
+
+When converting groovy code to java code make sure that:
+- the Java code generated is compatible with JDK 8
+- when translating Spock test, favor using `@CsvSource` with `|` delimiters
+- when using a `@MethodSource`, use the test method name, and suffix it with `_arguments`
+- when converting tuples, create light dedicated structure instead to keep the typing system
+- Instead of checking a state and throwing an exception, use JUnit asserts
+- Do not wrap checked exception and throwing a Runtime exception, prefer adding a throws clause at method declaration
+- Do not mark local variables `final`

buildSrc/call-site-instrumentation-plugin/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
   java
-  groovy
   id("com.diffplug.spotless") version "8.2.1"
   id("com.gradleup.shadow") version "8.3.9"
 }
@@ -34,8 +33,9 @@ dependencies {
   implementation(libs.javaparser.symbol.solver)
 
   testImplementation(libs.bytebuddy)
-  testImplementation(libs.bundles.groovy)
-  testImplementation(libs.bundles.spock)
+  testImplementation(libs.bundles.junit5)
+  testRuntimeOnly(libs.junit.platform.launcher)
+  testImplementation(libs.bundles.mockito)
   testImplementation("javax.servlet", "javax.servlet-api", "3.0.1")
   testImplementation(libs.spotbugs.annotations)
 }