/*
    * 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.bcel.classfile;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.File;
  import java.io.IOException;
  
  import org.apache.bcel.AbstractTestCase;
  import org.apache.bcel.util.SyntheticRepository;
  import org.apache.bcel.visitors.CountingVisitor;
  import org.junit.jupiter.api.Test;
  
  public class RecordTestCase extends AbstractTestCase {
  
      /**
       * Check that we can copy a attribute correctly.
       */
      @Test
      public void recordsCanBeCopied() throws ClassNotFoundException, IOException {
          final JavaClass clazz = new ClassParser("src/test/resources/record/SimpleRecord.class").parse();
          final JavaClass copyClazz = clazz.copy();
          assertEquals(clazz.toString(), copyClazz.toString(), "both records should have the same value");
      }
  
      /**
       * Check that a record can be visited by our visitors
       */
      @Test
      public void recordsCanBeVisited() throws ClassNotFoundException, IOException {
          final JavaClass clazz = new ClassParser("src/test/resources/record/SimpleRecord.class").parse();
          final CountingVisitor countVisitor = new CountingVisitor();
          final DescendingVisitor desendingVisitor = new DescendingVisitor(clazz, countVisitor);
          desendingVisitor.visit();
          assertEquals(1,countVisitor.recordCount, "should count one record");
          assertEquals(2,countVisitor.recordComponentCount, "should count two record components");
      }
  
  
      /**
       * Check that we can save and load the attribute correctly.
       */
      @Test
      public void testAttributeSerializtion() throws ClassNotFoundException, IOException {
          final JavaClass clazz = new ClassParser("src/test/resources/record/SimpleRecord.class").parse();
          final File tfile = createTestdataFile("SimpleRecord.class");
          final Record recordAttribute = (Record)findAttribute("Record",clazz)[0];
          clazz.dump(tfile);
          // Read in the new version and check it is OK
          final SyntheticRepository repos2 = createRepos(".");
          final JavaClass clazzFromRepo = repos2.loadClass("SimpleRecord");
          assertNotNull(clazzFromRepo); // Use the variable to avoid a warning
          final Record recordAttributeFromRepo = (Record)findAttribute("Record",clazzFromRepo)[0];
          assertEquals(recordAttribute.toString(), recordAttributeFromRepo.toString(), "Both attributes needs to be equal");
          tfile.deleteOnExit();
      }
  
      /**
       * A record type, once compiled, should result in a class file that is
       * marked such that we can determine from the access flags
       * (through BCEL) that it is in fact a record.
       *
       * @throws IOException
       * @throws ClassFormatException
       */
      @Test
      public void testRecordClassSaysItIs() throws ClassNotFoundException, ClassFormatException, IOException {
          final JavaClass clazz = new ClassParser("src/test/resources/record/SimpleRecord.class").parse();
          assertTrue(clazz.isRecord(), "Expected SimpleRecord class to say it was a record - but it didn't !");
          final JavaClass simpleClazz = getTestJavaClass(PACKAGE_BASE_NAME + ".data.SimpleClass");
          assertFalse(simpleClazz.isRecord(), "Expected SimpleClass class to say it was not a record - but it didn't !");
      }
  
      /**
       * A simple record with two simple fields, an integer and a String field, should
       * show its content in its string representation.
       *
       * @throws ClassNotFoundException
       * @throws ClassFormatException
       * @throws IOException
       */
     @Test
     public void testRecordToString() throws ClassNotFoundException, ClassFormatException, IOException {
         final JavaClass clazz = new ClassParser("src/test/resources/record/SimpleRecord.class").parse();
         final Attribute[] attributes = clazz.getAttributes();
         final Record recordAttribute = (Record) findAttribute("Record",clazz)[0];
         assertEquals(4, attributes.length);
         assertEquals("SourceFile: SimpleRecord.java", attributes[0].toString());
         assertEquals("Record(2):\n"
                 + "  RecordComponentInfo(aNumber,I,0):\n"
                 + "  RecordComponentInfo(aString,Ljava/lang/String;,1):\n"
                 + "  RuntimeVisibleAnnotations:\n"
                 + "  @Ljavax/annotation/Nonnull;"
                 ,recordAttribute.toString());
         final RecordComponentInfo firstComponent = recordAttribute.getComponents()[0];
         assertEquals(5, firstComponent.getIndex());
         assertEquals(6, firstComponent.getDescriptorIndex());
         assertEquals(0, firstComponent.getAttributes().length);
         assertEquals(recordAttribute.getConstantPool(),firstComponent.getConstantPool());
         assertEquals("RecordComponentInfo(aNumber,I,0):", firstComponent.toString());
     }
 
 }