JUnit test for methods writing to OutputStream

SystemOutTest.java

import static org.junit.Assert.assertEquals;

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

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

public class SystemOutTest {

	private final ByteArrayOutputStream output = new ByteArrayOutputStream();

	@Before
	public void setUpStreams() {
		System.setOut(new PrintStream(output));
	}

	@After
	public void cleanUpStreams() {
		System.setOut(null);
	}

	@Test
	public void testSystemOut() {
		System.out.print("assertme!");
		assertEquals("assertme!", output.toString());
	}

}