MsgNode mn0 = (MsgNode) nodes.get(0);
assertEquals("Tells user's quota usage.", mn0.getDesc());
assertEquals(null, mn0.getMeaning());
assertEquals(false, mn0.isHidden());
assertEquals(8, mn0.numChildren());
assertEquals("You're currently using ", ((RawTextNode) mn0.getChild(0)).getRawText());
MsgPlaceholderNode mpn1 = (MsgPlaceholderNode) mn0.getChild(1);
assertEquals("$usedMb", ((PrintNode) mpn1.getChild(0)).getExprText());
assertEquals(" MB of your quota. ", ((RawTextNode) mn0.getChild(2)).getRawText());