@Test
public void convertGlide2() {

    assertEquals("2.0", Convert.glide2(20, -10, 1, false));
    assertEquals("2.0 : 1", Convert.glide2(20, -10, 1, true));
    assertEquals("+2.0 : 1", Convert.glide2(20, 10, 1, true));
    // Special cases
    assertEquals("", Convert.glide2(20, 0, 1, true));
    assertEquals("", Convert.glide2(0, 10, 1, true));
    assertEquals("", Convert.glide2(0.1, 0.1, 1, true));
    assertEquals("", Convert.glide2(0, 0, 1, true));
}