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 encodings = require "util.encodings";
local utf8 = assert(encodings.utf8, "no encodings.utf8 module");
describe("util.encodings", function ()
describe("#encode()", function()
it("should work", function ()
assert.is.equal(encodings.base64.encode(""), "");
assert.is.equal(encodings.base64.encode('coucou'), "Y291Y291");
assert.is.equal(encodings.base64.encode("\0\0\0"), "AAAA");
assert.is.equal(encodings.base64.encode("\255\255\255"), "////");
end);
end);
describe("#decode()", function()
it("should work", function ()
assert.is.equal(encodings.base64.decode(""), "");
assert.is.equal(encodings.base64.decode("="), "");
assert.is.equal(encodings.base64.decode('Y291Y291'), "coucou");
assert.is.equal(encodings.base64.decode("AAAA"), "\0\0\0");
assert.is.equal(encodings.base64.decode("////"), "\255\255\255");
end);
end);
end);
describe("util.encodings.utf8", function()
describe("#valid()", function()
it("should work", function()
for line in io.lines("spec/utf8_sequences.txt") do
local data = line:match(":%s*([^#]+)"):gsub("%s+", ""):gsub("..", function (c) return string.char(tonumber(c, 16)); end)
local expect = line:match("(%S+):");
assert(expect == "pass" or expect == "fail", "unknown expectation: "..line:match("^[^:]+"));
local valid = utf8.valid(data);
assert.is.equal(valid, utf8.valid(data.." "));
assert.is.equal(valid, expect == "pass", line);
end
end);
end);
end);