fix: skip Maven validation plugins that reject generated test files

Maven plugins like Apache Rat, Checkstyle, SpotBugs, PMD, Enforcer, and
japicmp reject generated instrumented Java files (e.g. missing license
headers). Skip these validation plugins during test compilation and
execution since they are irrelevant for generated test code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mohamedashrraf222

codeflash/languages/java/test_runner.py

@@ -45,6 +45,17 @@
 # Allows: letters, digits, underscores, dots, and dollar signs (inner classes)
 _VALID_JAVA_CLASS_NAME = re.compile(r"^[a-zA-Z_$][a-zA-Z0-9_$.]*$")
 
+# Skip validation/analysis plugins that reject generated instrumented files
+# (e.g. Apache Rat rejects missing license headers, Checkstyle rejects naming, etc.)
+_MAVEN_VALIDATION_SKIP_FLAGS = [
+    "-Drat.skip=true",
+    "-Dcheckstyle.skip=true",
+    "-Dspotbugs.skip=true",
+    "-Dpmd.skip=true",
+    "-Denforcer.skip=true",
+    "-Djapicmp.skip=true",
+]
+
 
 def _validate_java_class_name(class_name: str) -> bool:
     """Validate that a string is a valid Java class name.
@@ -493,6 +504,7 @@ def _compile_tests(
         return subprocess.CompletedProcess(args=["mvn"], returncode=-1, stdout="", stderr="Maven not found")
 
     cmd = [mvn, "test-compile", "-e", "-B"]  # Show errors but not verbose output; -B for batch mode (no ANSI colors)
+    cmd.extend(_MAVEN_VALIDATION_SKIP_FLAGS)
 
     if test_module:
         cmd.extend(["-pl", test_module, "-am"])
@@ -1447,6 +1459,7 @@ def _run_maven_tests(
     # JaCoCo's report goal is bound to the verify phase to get post-test execution data
     maven_goal = "verify" if enable_coverage else "test"
     cmd = [mvn, maven_goal, "-fae", "-B"]  # Fail at end to run all tests; -B for batch mode (no ANSI colors)
+    cmd.extend(_MAVEN_VALIDATION_SKIP_FLAGS)
 
     # Add --add-opens flags for Java 16+ module system compatibility.
     # The codeflash-runtime Serializer uses Kryo which needs reflective access to