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local assert = require "luassert"
local spy = require "luassert.spy"
local match = require "luassert.match"
local a = require "nvim-lsp-installer.core.async"
local process = require "nvim-lsp-installer.process"
local function timestamp()
local seconds, microseconds = vim.loop.gettimeofday()
return (seconds * 1000) + math.floor(microseconds / 1000)
end
describe("async", function()
it("should run in blocking mode", function()
local start = timestamp()
a.run_blocking(function()
a.sleep(100)
end)
local stop = timestamp()
local grace_ms = 25
assert.is_true((stop - start) >= (100 - grace_ms))
end)
it(
"should pass arguments to .run",
async_test(function()
local callback = spy.new()
local start = timestamp()
a.run(a.sleep, callback, 100)
assert.wait_for(function()
assert.spy(callback).was_called(1)
local stop = timestamp()
local grace_ms = 25
assert.is_true((stop - start) >= (100 - grace_ms))
end, 150)
end)
)
it(
"should wrap callback-style async functions",
async_test(function()
local stdio = process.in_memory_sink()
local success, exit_code = a.promisify(process.spawn)("env", {
args = {},
env = { "FOO=BAR", "BAR=BAZ" },
stdio_sink = stdio.sink,
})
assert.is_true(success)
assert.equals(0, exit_code)
assert.equals("FOO=BAR\nBAR=BAZ\n", table.concat(stdio.buffers.stdout, ""))
end)
)
it(
"should reject callback-style functions",
async_test(function()
local err = assert.has_error(function()
a.promisify(function(arg1, cb)
cb(arg1, nil)
end, true) "påskmust"
end)
assert.equals(err, "påskmust")
end)
)
it(
"should return all values",
async_test(function()
local val1, val2, val3 = a.wait(function(resolve)
resolve(1, 2, 3)
end)
assert.equals(1, val1)
assert.equals(2, val2)
assert.equals(3, val3)
end)
)
it(
"should cancel coroutine",
async_test(function()
local james_bond = spy.new()
local poutine = a.scope(function()
a.sleep(100)
james_bond()
end)()
poutine()
a.sleep(200)
assert.spy(james_bond).was_not.called()
end)
)
it(
"should raise error if async function raises error",
async_test(function()
local err = assert.has.errors(a.promisify(function()
error "something went wrong"
end))
assert.is_true(match.has_match "something went wrong$"(err))
end)
)
it(
"should raise error if async function rejects",
async_test(function()
local err = assert.has.errors(function()
a.wait(function(_, reject)
reject "This is an error"
end)
end)
assert.equals("This is an error", err)
end)
)
it(
"should pass nil arguments to promisified functions",
async_test(function()
local fn = spy.new(function(_, _, _, _, _, _, _, cb)
cb()
end)
a.promisify(fn)(nil, 2, nil, 4, nil, nil, 7)
assert.spy(fn).was_called_with(nil, 2, nil, 4, nil, nil, 7, match.is_function())
end)
)
it("should accept yielding non-promise values to parent coroutine context", function()
local thread = coroutine.create(function(val)
a.run_blocking(function()
coroutine.yield(val)
end)
end)
local ok, value = coroutine.resume(thread, 1337)
assert.is_true(ok)
assert.equals(1337, value)
end)
it(
"should run all suspending functions concurrently",
async_test(function()
local start = timestamp()
local function sleep(ms, ret_val)
return function()
a.sleep(ms)
return ret_val
end
end
local one, two, three, four, five = a.wait_all {
sleep(100, 1),
sleep(100, "two"),
sleep(100, "three"),
sleep(100, 4),
sleep(100, 5),
}
local grace = 50
local delta = timestamp() - start
assert.is_true(delta <= (100 + grace))
assert.is_true(delta >= (100 - grace))
assert.equals(1, one)
assert.equals("two", two)
assert.equals("three", three)
assert.equals(4, four)
assert.equals(5, five)
end)
)
end)
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