/*
    * 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
    *
   *   https://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.bcel.util;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.IOException;
  
  import org.apache.bcel.classfile.JavaClass;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link ClassPathRepository}, {@link MemorySensitiveClassPathRepository}, and
   * {@link LruCacheClassPathRepository} for their common attributes of caching.
   *
   * <p>
   * Without memory scarcity, these classes behave in the same manner.
   */
  class ClassPathRepositoryTest {
  
      @Test
      void testClassPath() throws IOException {
          try (ClassPath classPath = new ClassPath("")) {
              final ClassPathRepository repository = new ClassPathRepository(classPath);
              try (ClassPath repoCp = repository.getClassPath()) {
                  assertEquals(classPath, repoCp);
              }
          }
      }
  
      @Test
      void testClassPathRepository() throws ClassNotFoundException, IOException {
          try (ClassPath classPath = new ClassPath("")) {
              verifyCaching(new ClassPathRepository(classPath));
          }
      }
  
      @Test
      void testClassWithoutPackage() throws IOException {
          try (ClassPath classPath = new ClassPath("")) {
              final ClassPathRepository repository = new ClassPathRepository(classPath);
              assertThrows(ClassNotFoundException.class, () -> repository.loadClass("ClassXYZ"));
          }
      }
  
      @Test
      void testEmptyInput() throws IOException {
          try (ClassPath classPath = new ClassPath("")) {
              final ClassPathRepository repository = new ClassPathRepository(classPath);
              assertThrows(IllegalArgumentException.class, () -> repository.loadClass(""));
          }
      }
  
      @Test
      void testLruCacheClassPathRepository() throws ClassNotFoundException, IOException {
          try (ClassPath classPath = new ClassPath("")) {
              verifyCaching(new LruCacheClassPathRepository(classPath, 10));
          }
      }
  
      @Test
      void testMemorySensitiveClassPathRepository() throws ClassNotFoundException, IOException {
          try (ClassPath classPath = new ClassPath("")) {
              verifyCaching(new MemorySensitiveClassPathRepository(classPath));
          }
      }
  
      @Test
      void testNoClassNotFound() throws IOException {
          try (ClassPath classPath = new ClassPath("")) {
              final ClassPathRepository repository = new ClassPathRepository(classPath);
              assertThrows(ClassNotFoundException.class, () -> repository.loadClass("no.such.Class"));
          }
      }
  
      @Test
      void testNullInput() throws IOException {
          try (ClassPath classPath = new ClassPath("")) {
              final ClassPathRepository repository = new ClassPathRepository(classPath);
              assertThrows(IllegalArgumentException.class, () -> repository.loadClass((String) null));
         }
     }
 
     private void verifyCaching(final AbstractClassPathRepository repository) throws ClassNotFoundException {
         // Tests loadClass()
         final JavaClass class1 = repository.loadClass("java.lang.String");
         assertNotNull(class1);
         final JavaClass class2 = repository.loadClass("java/lang/Long"); // Slashes should work
         assertNotNull(class2);
 
         // Tests findClass()
         assertEquals(class1, repository.findClass("java.lang.String"));
         assertEquals(class2, repository.findClass("java.lang.Long"));
 
         // Tests removeClass()
         repository.removeClass(class1);
         assertNull(repository.findClass("java.lang.String"));
 
         // Tests clear()
         repository.clear();
         assertNull(repository.findClass("java.lang.Long"));
     }
 }