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prosody/spec/util_async_spec.lua

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local async = require "util.async";
describe("util.async", function()
local debug = false;
local print = print;
if debug then
require "util.logger".add_simple_sink(print);
else
print = function () end
end
local function new(func, name)
local log = {};
return async.runner(func, setmetatable({}, {
__index = function (_, event)
return function (runner, err)
print(name, "event", event, err)
print "--"
table.insert(log, { event = event, err = err });
end;
end;
})), log;
end
describe("#runner", function()
it("should work", function()
local r, l = new(function (item) assert(type(item) == "number") end);
r:run(1);
r:run(2);
end);
it("should be ready after creation", function ()
local r = async.runner(function (item) end);
assert.equal(r.state, "ready");
end);
it("should do nothing if the queue is empty", function ()
local did_run;
local r = async.runner(function (item) did_run = true end);
r:run();
assert.equal(r.state, "ready");
assert.is_nil(did_run);
r:run("hello");
assert.is_true(did_run);
end);
it("should support queuing work items without running", function ()
local did_run;
local r = async.runner(function (item) did_run = true end);
r:enqueue("hello");
assert.equal(r.state, "ready");
assert.is_nil(did_run);
r:run();
assert.is_true(did_run);
end);
it("should support queuing multiple work items", function ()
local last_item;
local s = spy(function (item) last_item = item; end);
local r = async.runner(s);
r:enqueue("hello");
r:enqueue("there");
r:enqueue("world");
assert.equal(r.state, "ready");
r:run();
assert.equal(r.state, "ready");
assert.spy(s).was.called(3);
assert.equal(last_item, "world");
end);
it("should support all simple data types", function ()
local last_item;
local s = spy(function (item) last_item = item; end);
local r = async.runner(s);
local values = { {}, 123, "hello", true, false };
for i = 1, #values do
r:enqueue(values[i]);
end
assert.equal(r.state, "ready");
r:run();
assert.equal(r.state, "ready");
assert.spy(s).was.called(#values);
for i = 1, #values do
assert.spy(s).was.called_with(values[i]);
end
assert.equal(last_item, values[#values]);
end);
describe("#errors", function ()
local last_processed_item, last_error;
local r;
local wait, done;
r = async.runner(function (item)
if item == "error" then
error({ e = "test error" });
elseif item == "wait" then
wait, done = async.waiter();
wait();
error({ e = "post wait error" });
end
last_processed_item = item;
end, {
error = function (runner, err)
assert.equal(r, runner);
last_error = err;
end;
});
randomize(false);
it("should notify", function ()
local last_processed_item, last_error;
local r;
r = async.runner(function (item)
if item == "error" then
error({ e = "test error" });
end
last_processed_item = item;
end, {
error = function (runner, err)
assert.equal(r, runner);
last_error = err;
end;
});
r:run("hello");
assert.equal(r.state, "ready");
assert.equal(last_processed_item, "hello");
assert.equal(last_error, nil);
r:run("error");
assert.is_table(last_error);
assert.equal(last_error.e, "test error");
last_error = nil;
assert.equal(r.state, "ready");
assert.equal(last_processed_item, "hello");
end);
it("should not be fatal to the runner", function ()
r:run("world");
assert.equal(r.state, "ready");
assert.equal(last_processed_item, "world");
end);
it("should work despite a #waiter", function ()
-- This test covers an important case where a runner
-- throws an error while being executed outside of the
-- main loop. This happens when it was blocked ('waiting'),
-- and then released (via a call to done()).
last_error = nil;
r:run("wait");
assert.equal(r.state, "waiting");
done();
-- At this point an error happens (state goes error->ready)
assert.equal(r.state, "ready");
assert.is_table(last_error);
assert.equal(last_error.e, "post wait error");
last_error = nil;
r:run("hello again");
assert.equal(r.state, "ready");
assert.equal(last_processed_item, "hello again");
end);
it("should continue to process work items", function ()
local wait, done, last_item;
local runner_func = spy.new(function (item)
if item == "error" then
error("test error");
elseif item == "wait-error" then
wait, done = async.waiter();
wait();
error("test error");
end
last_item = item;
end);
local runner = async.runner(runner_func, { error = spy.new(function () end) });
runner:enqueue("one");
runner:enqueue("error");
runner:enqueue("two");
runner:run();
assert.equal(r.state, "ready");
assert.equal(r.state, r.notified_state);
assert.spy(runner_func).was.called(3);
assert.spy(runner.watchers.error).was.called(1);
assert.equal(last_item, "two");
end);
it("should continue to process work items during resume", function ()
local wait, done, last_item;
local runner_func = spy.new(function (item)
if item == "error" then
error("test error");
elseif item == "wait-error" then
wait, done = async.waiter();
wait();
error("test error");
end
last_item = item;
end);
local runner = async.runner(runner_func, { error = spy.new(function () end) });
runner:enqueue("one");
runner:enqueue("wait-error");
runner:enqueue("two");
runner:run();
done();
assert.equal(r.state, "ready");
assert.equal(r.state, r.notified_state);
assert.spy(runner_func).was.called(3);
assert.spy(runner.watchers.error).was.called(1);
assert.equal(last_item, "two");
end);
end);
end);
describe("#waiter", function()
it("should error outside of async context", function ()
assert.has_error(function ()
async.waiter();
end);
end);
it("should work", function ()
local wait, done;
local r, l = new(function (item)
assert(type(item) == "number")
if item == 3 then
wait, done = async.waiter();
wait();
end
end);
r:run(1);
assert(r.state == "ready");
r:run(2);
assert(r.state == "ready");
r:run(3);
assert(r.state == "waiting");
done();
assert(r.state == "ready");
--for k, v in ipairs(l) do print(k,v) end
end);
it("should work", function ()
--------------------
local wait, done;
local last_item = 0;
local r, l = new(function (item)
assert(type(item) == "number")
assert(item == last_item + 1);
last_item = item;
if item == 3 then
wait, done = async.waiter();
wait();
end
end);
r:run(1);
assert(r.state == "ready");
r:run(2);
assert(r.state == "ready");
r:run(3);
assert(r.state == "waiting");
r:run(4);
assert(r.state == "waiting");
done();
assert(r.state == "ready");
--for k, v in ipairs(l) do print(k,v) end
end);
it("should work", function ()
--------------------
local wait, done;
local last_item = 0;
local r, l = new(function (item)
assert(type(item) == "number")
assert((item == last_item + 1) or item == 3);
last_item = item;
if item == 3 then
wait, done = async.waiter();
wait();
end
end);
r:run(1);
assert(r.state == "ready");
r:run(2);
assert(r.state == "ready");
local dones = {};
r:run(3);
assert(r.state == "waiting");
r:run(3);
assert(r.state == "waiting");
r:run(3);
assert(r.state == "waiting");
r:run(4);
assert(r.state == "waiting");
for i = 1, 3 do
done();
if i < 3 then
assert(r.state == "waiting");
end
end
assert(r.state == "ready");
--for k, v in ipairs(l) do print(k,v) end
end);
it("should work", function ()
--------------------
local wait, done;
local last_item = 0;
local r, l = new(function (item)
assert(type(item) == "number")
assert((item == last_item + 1) or item == 3);
last_item = item;
if item == 3 then
wait, done = async.waiter();
wait();
end
end);
r:run(1);
assert(r.state == "ready");
r:run(2);
assert(r.state == "ready");
local dones = {};
r:run(3);
assert(r.state == "waiting");
r:run(3);
assert(r.state == "waiting");
for i = 1, 2 do
done();
if i < 2 then
assert(r.state == "waiting");
end
end
assert(r.state == "ready");
r:run(4);
assert(r.state == "ready");
assert(r.state == "ready");
--for k, v in ipairs(l) do print(k,v) end
end);
it("should work with multiple runners in parallel", function ()
-- Now with multiple runners
--------------------
local wait1, done1;
local last_item1 = 0;
local r1, l1 = new(function (item)
assert(type(item) == "number")
assert((item == last_item1 + 1) or item == 3);
last_item1 = item;
if item == 3 then
wait1, done1 = async.waiter();
wait1();
end
end, "r1");
local wait2, done2;
local last_item2 = 0;
local r2, l2 = new(function (item)
assert(type(item) == "number")
assert((item == last_item2 + 1) or item == 3);
last_item2 = item;
if item == 3 then
wait2, done2 = async.waiter();
wait2();
end
end, "r2");
r1:run(1);
assert(r1.state == "ready");
r1:run(2);
assert(r1.state == "ready");
local dones = {};
r1:run(3);
assert(r1.state == "waiting");
r1:run(3);
assert(r1.state == "waiting");
r2:run(1);
assert(r1.state == "waiting");
assert(r2.state == "ready");
r2:run(2);
assert(r1.state == "waiting");
assert(r2.state == "ready");
r2:run(3);
assert(r1.state == "waiting");
assert(r2.state == "waiting");
done2();
r2:run(3);
assert(r1.state == "waiting");
assert(r2.state == "waiting");
done2();
r2:run(4);
assert(r1.state == "waiting");
assert(r2.state == "ready");
for i = 1, 2 do
done1();
if i < 2 then
assert(r1.state == "waiting");
end
end
assert(r1.state == "ready");
r1:run(4);
assert(r1.state == "ready");
assert(r1.state == "ready");
--for k, v in ipairs(l1) do print(k,v) end
end);
it("should work work with multiple runners in parallel", function ()
--------------------
local wait1, done1;
local last_item1 = 0;
local r1, l1 = new(function (item)
print("r1 processing ", item);
assert(type(item) == "number")
assert((item == last_item1 + 1) or item == 3);
last_item1 = item;
if item == 3 then
wait1, done1 = async.waiter();
wait1();
end
end, "r1");
local wait2, done2;
local last_item2 = 0;
local r2, l2 = new(function (item)
print("r2 processing ", item);
assert.is_number(item);
assert((item == last_item2 + 1) or item == 3);
last_item2 = item;
if item == 3 then
wait2, done2 = async.waiter();
wait2();
end
end, "r2");
r1:run(1);
assert.equal(r1.state, "ready");
r1:run(2);
assert.equal(r1.state, "ready");
r1:run(5);
assert.equal(r1.state, "ready");
local dones = {};
r1:run(3);
assert.equal(r1.state, "waiting");
r1:run(5); -- Will error, when we get to it
assert.equal(r1.state, "waiting");
done1();
assert.equal(r1.state, "ready");
r1:run(3);
assert.equal(r1.state, "waiting");
r2:run(1);
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "ready");
r2:run(2);
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "ready");
r2:run(3);
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "waiting");
done2();
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "ready");
r2:run(3);
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "waiting");
done2();
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "ready");
r2:run(4);
assert.equal(r1.state, "waiting");
assert.equal(r2.state, "ready");
done1();
assert.equal(r1.state, "ready");
r1:run(4);
assert.equal(r1.state, "ready");
assert.equal(r1.state, "ready");
--for k, v in ipairs(l1) do print(k,v) end
end);
end);
end);
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