@Test
public void testAppendReferenceFrame() {
assertFalse(tFoot.equals(null));
assertTrue(tFoot.getReferenceFrames().size() == 1);
tFoot.appendIfUniqueRFrame(fName + "-Spherical");
assertTrue(tFoot.getReferenceFrames().size() == 2);
}
@Test
public void testRemoveReferenceFrame() {
assertTrue(tFoot.getReferenceFrames().size() == 1);
tFoot.appendIfUniqueRFrame(fName + "-Spherical2");
assertTrue(tFoot.getReferenceFrames().size() == 2);
tFoot.removeRFrames(fName + "-Spherical2");
assertTrue(tFoot.getReferenceFrames().size() == 1);
}