/*
 * 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.geode.internal.offheap;

import static org.junit.Assert.*;

import org.junit.Test;
import org.junit.experimental.categories.Category;

import org.apache.geode.test.junit.categories.UnitTest;

@Category(UnitTest.class)
public class RefCountChangeInfoJUnitTest {

  @Test
  public void testGetOwner() {

    String owner1 = new String("Info1");
    String notOwner1 = new String("notInfo1");

    RefCountChangeInfo refInfo1 = new RefCountChangeInfo(true, 1, owner1);
    RefCountChangeInfo refInfo2 = new RefCountChangeInfo(true, 1, notOwner1);

    assertEquals(owner1, refInfo1.getOwner());
    assertEquals(notOwner1, refInfo2.getOwner());
    assertFalse(refInfo1.getOwner().equals(refInfo2.getOwner()));

  }

  @Test
  public void testNullOwner() {

    String owner1 = null;
    String notOwner1 = new String("notInfo1");

    RefCountChangeInfo refInfo1 = new RefCountChangeInfo(true, 1, owner1);
    RefCountChangeInfo refInfo2 = new RefCountChangeInfo(true, 1, notOwner1);
    assertFalse(isOwnerNull(refInfo2.getOwner()));
    assertTrue(hasStringLit(refInfo2.toString(), " owner="));

    assertEquals(owner1, refInfo1.getOwner());
    assertEquals(notOwner1, refInfo2.getOwner());
    assertTrue(isOwnerNull(refInfo1.getOwner()));
    assertFalse(hasStringLit(refInfo1.toString(), " owner="));

  }

  private boolean isOwnerNull(Object own1) {
    return own1 == null;
  }

  private boolean hasStringLit(String str, String has) {
    if (str.indexOf(has) == -1)
      return false;
    return true;
  }

  @Test
  public void testGetUseCount() {

    String owner1 = new String("Info1");
    String owner2 = new String("Info2");

    RefCountChangeInfo refInfo1 = new RefCountChangeInfo(true, 1, owner1);
    assertEquals(0, refInfo1.getUseCount());

    RefCountChangeInfo refInfo2 = new RefCountChangeInfo(true, 1, owner1);
    assertTrue(refInfo1.isSameCaller(refInfo2));
    refInfo1.incUseCount();
    assertEquals(1, refInfo1.getUseCount());

    // owner not used in isDup
    RefCountChangeInfo refInfo3 = new RefCountChangeInfo(true, 1, owner2);
    assertTrue(refInfo1.isSameCaller(refInfo3));
    refInfo1.incUseCount();
    assertEquals(2, refInfo1.getUseCount());

    RefCountChangeInfo refInfo4 = new RefCountChangeInfo(false, 1, owner2);
    assertFalse(refInfo1.isSameCaller(refInfo4));
    assertEquals(2, refInfo1.getUseCount());

  }

  @Test
  public void testDecUseCount() {

    String owner1 = new String("Info1");
    String owner2 = new String("Info2");

    RefCountChangeInfo refInfo1 = new RefCountChangeInfo(true, 1, owner1);
    assertEquals(0, refInfo1.getUseCount());

    RefCountChangeInfo refInfo2 = new RefCountChangeInfo(true, 1, owner1);
    assertTrue(refInfo1.isSameCaller(refInfo2));
    refInfo1.incUseCount();
    assertEquals(1, refInfo1.getUseCount());

    // owner not used in isSameCaller check
    RefCountChangeInfo refInfo3 = new RefCountChangeInfo(true, 1, owner2);
    assertTrue(refInfo1.isSameCaller(refInfo3));
    refInfo1.incUseCount();
    assertEquals(2, refInfo1.getUseCount());

    refInfo1.decUseCount();
    assertEquals(1, refInfo1.getUseCount());

    refInfo1.decUseCount();
    assertEquals(0, refInfo1.getUseCount());

  }

  @Test
  public void testToString() {

    String owner1 = new String("Info1");

    RefCountChangeInfo refInfo1 = new RefCountChangeInfo(true, 1, owner1);

    RefCountChangeInfo refInfo2 = new RefCountChangeInfo(true, 1, owner1);
    assertEquals(refInfo1.toString(), refInfo2.toString());

    RefCountChangeInfo refInfo3 = new RefCountChangeInfo(false, 1, owner1);
    assertFalse(refInfo1.toString().equals(refInfo3.toString()));

    RefCountChangeInfo refInfo4 = new RefCountChangeInfo(true, 2, owner1);
    assertFalse(refInfo1.toString().equals(refInfo4.toString()));

  }

  @Test
  public void testisSameCaller() {

    String owner1 = new String("Info1");
    String owner2 = new String("Info2");

    RefCountChangeInfo refInfo1 = new RefCountChangeInfo(true, 1, owner1);
    assertEquals(0, refInfo1.getUseCount());

    RefCountChangeInfo refInfo2 = new RefCountChangeInfo(true, 1, owner1);
    assertTrue(refInfo1.isSameCaller(refInfo2));
    refInfo1.incUseCount();
    assertEquals(1, refInfo1.getUseCount());
    String str = refInfo1.toString();
    str = refInfo1.toString();

    assertTrue(hasStringLit(refInfo1.toString(), " useCount=1"));


    RefCountChangeInfo refInfo3 = new RefCountChangeInfo(false, 1, owner1);
    assertFalse(refInfo1.isSameCaller(refInfo3));
    assertEquals(1, refInfo1.getUseCount());

    RefCountChangeInfo refInfo4 = new RefCountChangeInfo(true, 1, owner2);
    assertTrue(refInfo1.isSameCaller(refInfo4));
    refInfo1.incUseCount();
    assertEquals(2, refInfo1.getUseCount());

    assertTrue(hasStringLit(refInfo1.toString(), " useCount=2"));

    refInfo1.setStackTraceString("not_the_same");
    assertFalse(refInfo1.isSameCaller(refInfo4));
    assertEquals(2, refInfo1.getUseCount());
    refInfo1.setStackTraceString(null);

    refInfo1.setStackTraceString(new SameHashDifferentTrace());
    refInfo4.setStackTraceString(new SameHashDifferentTrace());
    assertFalse(refInfo1.isSameCaller(refInfo4));
    assertEquals(2, refInfo1.getUseCount());

  }

  private static class SameHashDifferentTrace {

    public int hashCode() {
      return 1;
    }

    public boolean equals(Object notused) {
      return false;
    }
  }
}
