バグ限局ツールtarantulaの例にある中央値を求めるプログラムのJava実装（バグあり）

Mid.java

public class Mid {
	public static int mid(int x, int y, int z) {
		int m;
		m = z;
		if (y < z) {
			if (x < y) {
				m = y;
			} else if (x < z) {
				m = y;
			}
		} else {
			if (x > y) {
				m = y;
			} else if (x > z) {
				m = x;
			}
		}
		return m;
	}
}

MidTest.java

import static org.junit.Assert.*;

import org.junit.Test;

public class MidTest {

	@Test
	public void test1() {
		assertEquals(3, Mid.mid(3, 3, 5));
	}

	@Test
	public void test2() {
		assertEquals(2, Mid.mid(1, 2, 3));
	}

	@Test
	public void test3() {
		assertEquals(2, Mid.mid(3, 2, 1));
	}

	@Test
	public void test4() {
		assertEquals(5, Mid.mid(5, 5, 5));
	}

	@Test
	public void test5() {
		assertEquals(4, Mid.mid(5, 3, 4));
	}

	@Test
	public void test6() {
		assertEquals(2, Mid.mid(2, 1, 3));
	}

}