content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.kafka.common.utils;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class JavaTest {
  
      private String javaVendor;
      private String javaRuntimeName;
  
      @BeforeEach
      public void before() {
          javaVendor = System.getProperty("java.vendor");
          javaRuntimeName = System.getProperty("java.runtime.name");
      }
  
      @AfterEach
      public void after() {
          System.setProperty("java.vendor", javaVendor);
          System.setProperty("java.runtime.name", javaRuntimeName);
      }
  
      @Test
      public void testIsIBMJdk() {
          System.setProperty("java.vendor", "Oracle Corporation");
          assertFalse(Java.isIbmJdk());
          System.setProperty("java.vendor", "IBM Corporation");
          assertTrue(Java.isIbmJdk());
      }
  
      @Test
      public void testIsIBMJdkSemeru() {
          System.setProperty("java.vendor", "Oracle Corporation");
          assertFalse(Java.isIbmJdkSemeru());
          System.setProperty("java.vendor", "IBM Corporation");
          System.setProperty("java.runtime.name", "Java(TM) SE Runtime Environment");
          assertFalse(Java.isIbmJdkSemeru());
          System.setProperty("java.vendor", "IBM Corporation");
          System.setProperty("java.runtime.name", "IBM Semeru Runtime Certified Edition");
          assertTrue(Java.isIbmJdkSemeru());
      }
  
      @Test
      public void testLoadKerberosLoginModule() throws ClassNotFoundException {
          // IBM Semeru JDKs use the OpenJDK security providers
          String clazz = Java.isIbmJdk() && !Java.isIbmJdkSemeru()
                  ? "com.ibm.security.auth.module.Krb5LoginModule"
                  : "com.sun.security.auth.module.Krb5LoginModule";
          Class.forName(clazz);
      }
  }
  