geode-core/src/test/java/org/apache/geode/internal/logging/log4j/HexThreadIdPatternConverterTest.java

/*
 * 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.logging.log4j;

import static org.assertj.core.api.Assertions.assertThat;

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

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

/**
 * Unit tests for {@link HexThreadIdPatternConverter}.
 */
@Category(LoggingTest.class)
public class HexThreadIdPatternConverterTest {

  private HexThreadIdPatternConverter converter;
  private StringBuilder toAppendTo;

  @Before
  public void setUp() {
    converter = HexThreadIdPatternConverter.INSTANCE;
    toAppendTo = new StringBuilder();
  }

  @Test
  public void appendsCurrentThreadIdInHex() {
    converter.format(null, toAppendTo);

    assertThat(toAppendTo.toString())
        .isEqualTo("0x" + Long.toHexString(Thread.currentThread().getId()));
  }
}