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local lanes = require "lanes"
local fixture = require "fixture"
lanes.finally(fixture.throwing_finalizer)
local utils = lanes.require "_utils"
local PRINT = utils.MAKE_PRINT()
-- the coroutine generator
local coro_g = lanes.coro("*", {name = "auto"}, utils.yield_one_by_one)
-------------------------------------------------------------------------
-- TEST: if we index a yielded lane, we should get the last yielded value
-------------------------------------------------------------------------
if true then
-- launch coroutine lane
local h = coro_g("hello", "world", "!")
-- read the first yielded value, sending back the expected index
assert(h:resume(1) == "hello")
-- indexing multiple times gives back the same us the same yielded value
local r1 = h[1]
local r2 = h[1]
local r3 = h[1]
assert(r1 == "world" and r2 == "world" and r3 == "world", "got " .. r1 .. " " .. r2 .. " " .. r3)
-- once the lane was indexed, it is no longer resumable (just like after join)
local b, e = pcall(h.resume, h, 2)
assert(b == false and e == "cannot resume non-suspended coroutine Lane")
end
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