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package org.scijava.log;

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

import java.util.Arrays;

import org.junit.Before;
import org.junit.Test;

/**
 * Tests {@link DefaultLogger}
 *
 * @author Matthias Arzt
 */
public class DefaultLoggerTest {

	private Logger logger;
	private TestLogListener listener;

	@Before
	public void setup() {
		logger = new DefaultLogger(message -> {}, LogSource.newRoot(), LogLevel.INFO);
		listener = new TestLogListener();
		logger.addLogListener(listener);
	}

	@Test
	public void test() {
		listener.clear();

		logger.error("Hello World!");

		assertTrue(listener.hasLogged(m -> m.text().equals("Hello World!")));
		assertTrue(listener.hasLogged(m -> m.level() == LogLevel.ERROR));
	}

	@Test
	public void testSubLogger() {
		listener.clear();
		Logger sub = logger.subLogger("sub");

		sub.error("Hello World!");

		assertTrue(listener.hasLogged(m -> m.source().path().contains("sub")));
	}

	@Test
	public void testHierarchicLogger() {
		listener.clear();
		Logger subA = logger.subLogger("subA");
		Logger subB = subA.subLogger("subB");

		subB.error("Hello World!");

		assertTrue(listener.hasLogged(m -> m.source().equals(subB.getSource())));
		assertEquals(Arrays.asList("subA"), subA.getSource().path());
		assertEquals(Arrays.asList("subA", "subB"), subB.getSource().path());
	}

	@Test
	public void testLogForwarding() {
		listener.clear();
		Logger sub = logger.subLogger("xyz");
		TestLogListener subListener = new TestLogListener();
		sub.addLogListener(subListener);

		sub.error("Hello World!");
		logger.error("Goodbye!");

		assertTrue(subListener.hasLogged(m -> m.text().equals("Hello World!")));
		assertFalse(subListener.hasLogged(m -> m.text().equals("Goodbye!")));
		assertTrue(listener.hasLogged(m -> m.text().equals("Hello World!")));
		assertTrue(listener.hasLogged(m -> m.text().equals("Goodbye!")));
	}
}
