assertEquals(3, sc.fixtures.indexOf(vf3));
assertEquals(4, sc.fixtures.indexOf(vf4));
assertEquals(5, sc.fixtures.indexOf(ex2));
sc.insertBetween(ex2, vf5);
assertEquals(7, sc.fixtures.size());
assertEquals(0, sc.fixtures.indexOf(vf));
assertEquals(1, sc.fixtures.indexOf(vf2));
assertEquals(2, sc.fixtures.indexOf(ex));
assertEquals(3, sc.fixtures.indexOf(vf3));