metron-analytics/metron-profiler-common/src/test/java/org/apache/metron/profiler/clock/WallClockTest.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
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 *
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package org.apache.metron.profiler.clock;

import org.json.simple.JSONObject;
import org.junit.jupiter.api.Test;

import java.util.Optional;

import static org.junit.jupiter.api.Assertions.assertTrue;

public class WallClockTest {

  public JSONObject createMessage() {
    return new JSONObject();
  }

  /**
   * The wall clock time ALWAYS comes from the system clock.
   */
  @Test
  public void testCurrentTimeMillis() {

    JSONObject message = createMessage();
    long before = System.currentTimeMillis();

    // what time is it?
    WallClock clock = new WallClock();
    Optional<Long> result = clock.currentTimeMillis(message);

    // validate
    long after = System.currentTimeMillis();
    assertTrue(result.isPresent());
    assertTrue(result.get() >= before);
    assertTrue(result.get() <= after);
  }
}