/*
 * 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.flink.streaming.runtime.streamstatus;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;

public class StreamStatusTest {

	@Test (expected = IllegalArgumentException.class)
	public void testIllegalCreationThrowsException() {
		new StreamStatus(32);
	}

	@Test
	public void testEquals() {
		StreamStatus idleStatus = new StreamStatus(StreamStatus.IDLE_STATUS);
		StreamStatus activeStatus = new StreamStatus(StreamStatus.ACTIVE_STATUS);

		assertEquals(StreamStatus.IDLE, idleStatus);
		assertTrue(idleStatus.isIdle());
		assertFalse(idleStatus.isActive());

		assertEquals(StreamStatus.ACTIVE, activeStatus);
		assertTrue(activeStatus.isActive());
		assertFalse(activeStatus.isIdle());
	}

	@Test
	public void testTypeCasting() {
		StreamStatus status = StreamStatus.ACTIVE;

		assertTrue(status.isStreamStatus());
		assertFalse(status.isRecord());
		assertFalse(status.isWatermark());
		assertFalse(status.isLatencyMarker());

		try {
			status.asWatermark();
			fail("should throw an exception");
		} catch (Exception e) {
			// expected
		}

		try {
			status.asRecord();
			fail("should throw an exception");
		} catch (Exception e) {
			// expected
		}

		try {
			status.asLatencyMarker();
			fail("should throw an exception");
		} catch (Exception e) {
			// expected
		}
	}

}