util.dbuffer: Add efficient shortcuts for discard() in certain cases
If the buffer is already empty, nothing to do. If we're throwing away the
whole buffer, we can just empty it and avoid read_chunk() (which in turn
may collapse()). These shortcuts are much more efficient.
local muc_util;
local st = require "util.stanza";
do
-- XXX Hack for lack of a mock moduleapi
local env = setmetatable({
module = {
_shared = {};
-- Close enough to the real module:shared() for our purposes here
shared = function (self, name)
local t = self._shared[name];
if t == nil then
t = {};
self._shared[name] = t;
end
return t;
end;
}
}, { __index = _ENV or _G });
muc_util = require "util.envload".envloadfile("plugins/muc/util.lib.lua", env)();
end
describe("muc/util", function ()
describe("filter_muc_x()", function ()
it("correctly filters muc#user", function ()
local stanza = st.message({ to = "to", from = "from", id = "foo" })
:tag("x", { xmlns = "http://jabber.org/protocol/muc#user" })
:tag("invite", { to = "user@example.com" });
assert.equal(1, #stanza.tags);
assert.equal(stanza, muc_util.filter_muc_x(stanza));
assert.equal(0, #stanza.tags);
end);
it("correctly filters muc#user on a cloned stanza", function ()
local stanza = st.message({ to = "to", from = "from", id = "foo" })
:tag("x", { xmlns = "http://jabber.org/protocol/muc#user" })
:tag("invite", { to = "user@example.com" });
assert.equal(1, #stanza.tags);
local filtered = muc_util.filter_muc_x(st.clone(stanza));
assert.equal(1, #stanza.tags);
assert.equal(0, #filtered.tags);
end);
end);
end);