/*
 *
 *  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.metron.profiler.clock;

import org.apache.metron.common.configuration.profiler.ProfilerConfig;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.util.Optional;

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

/**
 * Tests the DefaultClockFactory.
 */
public class DefaultClockFactoryTest {

  /**
   * The object under test.
   */
  private DefaultClockFactory clockFactory;

  @BeforeEach
  public void setup() {
    clockFactory = new DefaultClockFactory();
  }

  /**
   * When a 'timestampField' is defined the factory should return a clock
   * that deals with event time.
   */
  @Test
  public void testCreateEventTimeClock() {

    // configure the profiler to use event time
    ProfilerConfig config = new ProfilerConfig();
    config.setTimestampField(Optional.of("timestamp"));

    // the factory should return a clock that handles 'event time'
    Clock clock = clockFactory.createClock(config);
    assertTrue(clock instanceof EventTimeClock);
  }

  /**
   * When a 'timestampField' is defined the factory should return a clock
   * that deals with processing time.
   */
  @Test
  public void testCreateProcessingTimeClock() {

    // the profiler uses processing time by default
    ProfilerConfig config = new ProfilerConfig();

    // the factory should return a clock that handles 'processing time'
    Clock clock = clockFactory.createClock(config);
    assertTrue(clock instanceof WallClock);
  }
}
