util.hashring: Support associating arbitrary data with nodes
In this API, a 'node' is always a simple text string. Sometimes the caller may
have a more complex structure representing a node, but the hash ring is really
only concerned with the node's name.
This API change allows :add_nodes() to take a table of `node_name = value`
pairs, as well as the simple array of node names previously accepted.
The 'value' of the selected node is returned as a new second result from
:get_node().
If no value is passed when a node is added, it defaults to `true` (as before,
but this was never previously exposed).
local xml = require "util.xml";
describe("util.xml", function()
describe("#parse()", function()
it("should work", function()
local x =
[[<x xmlns:a="b">
<y xmlns:a="c"> <!-- this overwrites 'a' -->
<a:z/>
</y>
<a:z/> <!-- prefix 'a' is nil here, but should be 'b' -->
</x>
]]
local stanza = xml.parse(x, {allow_comments = true});
assert.are.equal(stanza.tags[2].attr.xmlns, "b");
assert.are.equal(stanza.tags[2].namespaces["a"], "b");
end);
it("should reject doctypes", function()
local x = "<!DOCTYPE foo []><foo/>";
local ok = xml.parse(x);
assert.falsy(ok);
end);
it("should reject comments by default", function()
local x = "<foo><!-- foo --></foo>";
local ok = xml.parse(x);
assert.falsy(ok);
end);
it("should allow comments if asked nicely", function()
local x = "<foo><!-- foo --></foo>";
local stanza = xml.parse(x, {allow_comments = true});
assert.are.equal(stanza.name, "foo");
assert.are.equal(#stanza, 0);
end);
it("should reject processing instructions", function()
local x = "<foo><?php die(); ?></foo>";
local ok = xml.parse(x);
assert.falsy(ok);
end);
it("should allow processing instructions if asked nicely", function()
local x = "<?xml-stylesheet href='make-fancy.xsl'?><foo/>";
local stanza = xml.parse(x, {allow_processing_instructions = true});
assert.truthy(stanza);
assert.are.equal(stanza.name, "foo");
end);
it("should allow an xml declaration", function()
local x = "<?xml version='1.0'?><foo/>";
local stanza = xml.parse(x);
assert.truthy(stanza);
assert.are.equal(stanza.name, "foo");
end);
end);
end);