swm.setLWMScn(source1, scn);
swm.setHWMScn(source1, scn);
assertEquals(swm.getHWMScn(source1), swm.getLWMScn(source1));
scn = System.currentTimeMillis() + counter++;
swm.saveHWMark(source1, scn);
assertTrue(swm.getLWMScn(source1) < swm.getHWMScn(source1));
scn = System.currentTimeMillis() + counter++;
swm.setWaterMarks(source1, scn, scn);
assertEquals(scn, swm.getLWMScn(source1));