java simple tests

public class Method {

    public static String mSampleString = "Hi, my name is Anonymous.";

    public static void main(String[] args) {
        String s = mSampleString;
        changeString(s);
    }

    public static void changeString(String s) {
        System.out.println(s.indexOf("n"));
        System.out.println(s.charAt(1));

    }
}

package method;

import org.junit.Test;
import static org.junit.Assert.*;


public class MethodTest {

    public static String mSampleString = "Hi, my name is Derek.";

    public static void main(String[] args) {
        Method m = new Method();
        testMethod();       

    }

    @Test
    public static void testMethod() throws Exception {
        assertEquals("i", mSampleString.charAt(1));
                assertEquals(5, mSampleString.indexOf("m"));
    }
}