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package org.scijava.log;

import static org.junit.Assert.assertTrue;
import static org.scijava.log.LogLevel.WARN;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;

import org.junit.Test;

/**
 * Tests {@link StderrLogService}.
 * 
 * @author Johannes Schindelin
 * @author Matthias Arzt
 */
public class StderrLogServiceTest {

	@Test
	public void testDefaultLevel() {
		final LogService log = new StderrLogService();
		int level = log.getLevel();
		assertTrue("default level (" + level + //
			") is at least INFO(" + WARN + ")", level >= WARN);
	}

	@Test
	public void testOutputToStream() {
		// setup
		final StderrLogService logService = new StderrLogService();
		final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
		final PrintStream p = new PrintStream(outputStream);
		logService.setPrintStreams(ignore -> p);

		final String text1 = "Hello World!";
		final String text2 = "foo bar";

		// process
		logService.warn(text1);
		logService.subLogger("sub").error(text2);

		// test
		assertTrue(outputStream.toString().contains(text1));
		assertTrue(outputStream.toString().contains(text2));
	}
}
