public class TestName extends TestWatcher {
 private String fName;
 @Override
 protected void starting(Description d) {
  fName = d.getMethodName();
 }
 /**
  * @return the name of the currently-running test method
  */
 public String getMethodName() {
  return fName;
 }
}

protected void starting(Description d) {
 fName = d.getClassName() + "." + d.getMethodName();
}

public class NameRuleTest {
 @Rule public TestName name = new TestName();
 @Test public void testA() {
  assertEquals("testA", name.getMethodName());
 }
 @Test public void testB() {
  assertEquals("testB", name.getMethodName());
 }
}