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mqtt-backend/node_modules/retimer/test.js

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+'use strict'
+
+const test = require('tape')
+const retimer = require('./')
+
+test('schedule a callback', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  retimer(function () {
+    t.ok(Date.now() - start >= 50, 'it was deferred ok!')
+  }, 50)
+})
+
+test('reschedule a callback', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  const timer = retimer(function () {
+    t.ok(Date.now() - start >= 70, 'it was deferred ok!')
+  }, 50)
+
+  setTimeout(function () {
+    timer.reschedule(50)
+  }, 20)
+})
+
+test('reschedule multiple times', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  const timer = retimer(function () {
+    t.ok(Date.now() - start >= 90, 'it was deferred ok!')
+  }, 50)
+
+  setTimeout(function () {
+    timer.reschedule(50)
+    setTimeout(function () {
+      timer.reschedule(50)
+    }, 20)
+  }, 20)
+})
+
+test('clear a timer', function (t) {
+  t.plan(1)
+
+  const timer = retimer(function () {
+    t.fail('the timer should never get called')
+  }, 20)
+
+  timer.clear()
+
+  setTimeout(function () {
+    t.pass('nothing happened')
+  }, 50)
+})
+
+test('clear a timer after a reschedule', function (t) {
+  t.plan(1)
+
+  const timer = retimer(function () {
+    t.fail('the timer should never get called')
+  }, 20)
+
+  setTimeout(function () {
+    timer.reschedule(50)
+    setTimeout(function () {
+      timer.clear()
+    }, 10)
+  }, 10)
+
+  setTimeout(function () {
+    t.pass('nothing happened')
+  }, 50)
+})
+
+test('can be rescheduled early', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  const timer = retimer(function () {
+    t.ok(Date.now() - start <= 500, 'it was rescheduled!')
+  }, 500)
+
+  setTimeout(function () {
+    timer.reschedule(10)
+  }, 20)
+})
+
+test('can be rescheduled even if the timeout has already triggered', function (t) {
+  t.plan(2)
+
+  const start = Date.now()
+  let count = 0
+
+  const timer = retimer(function () {
+    count++
+    if (count === 1) {
+      t.ok(Date.now() - start >= 20, 'it was triggered!')
+      timer.reschedule(20)
+    } else {
+      t.ok(Date.now() - start >= 40, 'it was rescheduled!')
+    }
+  }, 20)
+})
+
+test('pass arguments to the callback', function (t) {
+  t.plan(1)
+
+  retimer(function (arg) {
+    t.equal(arg, 42, 'argument matches')
+  }, 50, 42)
+})