util.signal: Add support for signalfd(2) on Linux
signalfd allows handling signal events using the same method as sockets,
via file descriptors. Thus all signal dispatch can go through the same
main event loop as everything else, removing need for thread-scary
signal handling where execution would just jump to the signal handler
regardless of the state of Lua, and needing to keep track of Lua
states/threads.
local errors = require "util.error"
describe("util.error", function ()
describe("new()", function ()
it("works", function ()
local err = errors.new("bork", "bork bork");
assert.not_nil(err);
assert.equal("cancel", err.type);
assert.equal("undefined-condition", err.condition);
assert.same("bork bork", err.context);
end);
describe("templates", function ()
it("works", function ()
local templates = {
["fail"] = {
type = "wait",
condition = "internal-server-error",
code = 555;
};
};
local err = errors.new("fail", { traceback = "in some file, somewhere" }, templates);
assert.equal("wait", err.type);
assert.equal("internal-server-error", err.condition);
assert.equal(555, err.code);
assert.same({ traceback = "in some file, somewhere" }, err.context);
end);
end);
end);
describe("is_err()", function ()
it("works", function ()
assert.truthy(errors.is_err(errors.new()));
assert.falsy(errors.is_err("not an error"));
end);
end);
describe("coerce", function ()
it("works", function ()
local ok, err = errors.coerce(nil, "it dun goofed");
assert.is_nil(ok);
assert.truthy(errors.is_err(err))
end);
end);
describe("from_stanza", function ()
it("works", function ()
local st = require "util.stanza";
local m = st.message({ type = "chat" });
local e = st.error_reply(m, "modify", "bad-request", nil, "error.example"):tag("extra", { xmlns = "xmpp:example.test" });
local err = errors.from_stanza(e);
assert.truthy(errors.is_err(err));
assert.equal("modify", err.type);
assert.equal("bad-request", err.condition);
assert.equal(e, err.context.stanza);
assert.equal("error.example", err.context.by);
assert.not_nil(err.extra.tag);
assert.not_has_error(function ()
errors.from_stanza(st.message())
end);
end);
end);
describe("__tostring", function ()
it("doesn't throw", function ()
assert.has_no.errors(function ()
-- See 6f317e51544d
tostring(errors.new());
end);
end);
end);
describe("extra", function ()
it("keeps some extra fields", function ()
local err = errors.new({condition="gone",text="Sorry mate, it's all gone",extra={uri="file:///dev/null"}});
assert.is_table(err.extra);
assert.equal("file:///dev/null", err.extra.uri);
end);
end)
describe("init", function()
it("basics works", function()
local reg = errors.init("test", {
broke = {type = "cancel"; condition = "internal-server-error"; text = "It broke :("};
nope = {type = "auth"; condition = "not-authorized"; text = "Can't let you do that Dave"};
});
local broke = reg.new("broke");
assert.equal("cancel", broke.type);
assert.equal("internal-server-error", broke.condition);
assert.equal("It broke :(", broke.text);
assert.equal("test", broke.source);
local nope = reg.new("nope");
assert.equal("auth", nope.type);
assert.equal("not-authorized", nope.condition);
assert.equal("Can't let you do that Dave", nope.text);
end);
it("compact mode works", function()
local reg = errors.init("test", "spec", {
broke = {"cancel"; "internal-server-error"; "It broke :("};
nope = {"auth"; "not-authorized"; "Can't let you do that Dave"; "sorry-dave"};
});
local broke = reg.new("broke");
assert.equal("cancel", broke.type);
assert.equal("internal-server-error", broke.condition);
assert.equal("It broke :(", broke.text);
assert.is_nil(broke.extra);
local nope = reg.new("nope");
assert.equal("auth", nope.type);
assert.equal("not-authorized", nope.condition);
assert.equal("Can't let you do that Dave", nope.text);
assert.equal("spec", nope.extra.namespace);
assert.equal("sorry-dave", nope.extra.condition);
end);
it("registry looks the same regardless of syntax", function()
local normal = errors.init("test", {
broke = {type = "cancel"; condition = "internal-server-error"; text = "It broke :("};
nope = {
type = "auth";
condition = "not-authorized";
text = "Can't let you do that Dave";
extra = {namespace = "spec"; condition = "sorry-dave"};
};
});
local compact1 = errors.init("test", "spec", {
broke = {"cancel"; "internal-server-error"; "It broke :("};
nope = {"auth"; "not-authorized"; "Can't let you do that Dave"; "sorry-dave"};
});
local compact2 = errors.init("test", {
broke = {"cancel"; "internal-server-error"; "It broke :("};
nope = {"auth"; "not-authorized"; "Can't let you do that Dave"};
});
assert.same(normal.registry, compact1.registry);
assert.same({
broke = {type = "cancel"; condition = "internal-server-error"; text = "It broke :("};
nope = {type = "auth"; condition = "not-authorized"; text = "Can't let you do that Dave"};
}, compact2.registry);
end);
describe(".wrap", function ()
local reg = errors.init("test", "spec", {
myerror = { "cancel", "internal-server-error", "Oh no" };
});
it("is exposed", function ()
assert.is_function(reg.wrap);
end);
it("returns errors according to the registry", function ()
local e = reg.wrap("myerror");
assert.equal("cancel", e.type);
assert.equal("internal-server-error", e.condition);
assert.equal("Oh no", e.text);
end);
it("passes through existing errors", function ()
local e = reg.wrap(reg.new({ type = "auth", condition = "forbidden" }));
assert.equal("auth", e.type);
assert.equal("forbidden", e.condition);
end);
it("wraps arbitrary values", function ()
local e = reg.wrap(123);
assert.equal("cancel", e.type);
assert.equal("undefined-condition", e.condition);
assert.equal(123, e.context.wrapped_error);
end);
end);
describe(".coerce", function ()
local reg = errors.init("test", "spec", {
myerror = { "cancel", "internal-server-error", "Oh no" };
});
it("is exposed", function ()
assert.is_function(reg.coerce);
end);
it("passes through existing errors", function ()
local function test()
return nil, errors.new({ type = "auth", condition = "forbidden" });
end
local ok, err = reg.coerce(test());
assert.is_nil(ok);
assert.is_truthy(errors.is_err(err));
assert.equal("forbidden", err.condition);
end);
it("passes through successful return values", function ()
local function test()
return 1, 2, 3, 4;
end
local one, two, three, four = reg.coerce(test());
assert.equal(1, one);
assert.equal(2, two);
assert.equal(3, three);
assert.equal(4, four);
end);
it("wraps non-error objects", function ()
local function test()
return nil, "myerror";
end
local ok, err = reg.coerce(test());
assert.is_nil(ok);
assert.is_truthy(errors.is_err(err));
assert.equal("internal-server-error", err.condition);
assert.equal("Oh no", err.text);
end);
end);
end);
end);