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local system = require 'system.core'
describe('Test time functions', function()
-- returns the new second, on the new second
local function wait_for_second_rollover()
local start_time = math.floor(os.time())
local end_time = math.floor(os.time())
while end_time == start_time do
end_time = math.floor(os.time())
end
return end_time
end
describe("time()", function()
it('returns current time', function()
local expected_time = wait_for_second_rollover()
local received_time = system.gettime()
assert.is.near(expected_time, received_time, 0.02)
wait_for_second_rollover()
assert.is.near(1, system.gettime() - received_time, 0.02)
end)
end)
describe("monotime()", function()
it('returns monotonically increasing time', function()
local starttime = system.monotime()
local endtime = system.monotime()
local delta = endtime - starttime
assert.is_true(starttime > 0)
assert.is_true(delta >= 0)
assert.is_true(system.monotime() - endtime >= 0)
end)
end)
describe("sleep()", function()
it("should sleep for the specified time", function()
local start_time = system.gettime()
system.sleep(1, 1)
local end_time = system.gettime()
local elapsed_time = end_time - start_time
assert.is.near(elapsed_time, 1, 0.2) -- large marging of error due to CI priorities
end)
it("should sleep for the specified time; fractional", function()
local start_time = system.gettime()
system.sleep(0.5, 1)
local end_time = system.gettime()
local elapsed_time = end_time - start_time
assert.is.near(0.5, elapsed_time, 0.2) -- large marging of error due to CI priorities
end)
it("should return immediately for a non-positive sleep time", function()
local start_time = system.gettime()
system.sleep(-1)
local end_time = system.gettime()
local elapsed_time = end_time - start_time
assert.is.near(elapsed_time, 0, 0.01)
end)
end)
end)
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