spotless fixes for test cases

Author: FlorianBruckner

muzzle/src/main/java/io/opentelemetry/javaagent/tooling/HelperInjector.java

@@ -7,7 +7,6 @@
 
 import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.SEVERE;
-import static java.util.logging.Level.WARNING;
 
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import io.opentelemetry.instrumentation.api.internal.cache.Cache;
@@ -118,6 +117,7 @@ public HelperInjector(
 
     List<HelperClassDefinition> helpers =
         helperClassNames.stream()
+            .distinct()
             .map(
                 className ->
                     HelperClassDefinition.create(
@@ -184,11 +184,8 @@ public DynamicType.Builder<?> transform(
                           HelperClassDefinition::getClassName,
                           helper -> () -> helper.getBytecode().getBytecode(),
                           (a, b) -> {
-                            logger.log(
-                                WARNING,
-                                "Duplicate classname for helper class in module {0} detected",
-                                new Object[] {this.requestingName});
-                            return a;
+                            throw new IllegalStateException(
+                                "Duplicate classnames for helper class detected!");
                           },
                           LinkedHashMap::new));
 

testing-common/integration-tests/src/main/java/helper/DuplicateHelper.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package helper;
 
 public class DuplicateHelper {

testing-common/integration-tests/src/main/java/helper/DuplicateHelperInstrumentation.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package helper;
 
 import static net.bytebuddy.matcher.ElementMatchers.named;

testing-common/integration-tests/src/main/java/helper/DuplicateHelperInstrumentationModule.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package helper;
 
 import static java.util.Collections.singletonList;

testing-common/integration-tests/src/test/java/helper/DuplicateHelperTest.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package helper;
 
 import static org.assertj.core.api.Assertions.assertThat;

testing-common/integration-tests/src/test/java/helper/DuplicateHelperTestClass.java

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 package helper;
 
 class DuplicateHelperTestClass {