@Test
public void convertAngle2() {

    assertEquals("straight", Convert.angle2(0.0));
    assertEquals("90 right", Convert.angle2(90.0));
    assertEquals("90 right", Convert.angle2(90.5));
    assertEquals("130 right", Convert.angle2(135.0));
    assertEquals("130 left", Convert.angle2(-135.0));
    assertEquals("", Convert.angle2(Double.NaN));
}