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123 lines
2.0 KiB
JavaScript
123 lines
2.0 KiB
JavaScript
var tape = require('tape')
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var thunky = require('./')
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tape('run only once', function (t) {
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t.plan(3)
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var ran = 0
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var run = thunky(function (cb) {
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ran++
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cb()
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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})
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})
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tape('run only once async', function (t) {
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t.plan(3)
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var ran = 0
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var run = thunky(function (cb) {
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process.nextTick(function () {
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ran++
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cb()
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})
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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})
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})
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tape('re-run on error', function (t) {
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t.plan(3)
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var ran = 0
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var run = thunky(function (cb) {
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ran++
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cb(new Error('stop'))
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})
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run(function () {
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t.same(ran, 1, 'ran once')
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run(function () {
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t.same(ran, 2, 'ran once')
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run(function () {
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t.same(ran, 3, 'ran once')
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})
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})
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})
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})
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tape('pass arguments', function (t) {
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t.plan(6)
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var ran = 0
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var run = thunky(function (fn) {
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ran++
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fn({ hello: 'world' })
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})
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run(function (val) {
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t.same(ran, 1, 'ran once')
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t.same(val, { hello: 'world' })
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run(function (val) {
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t.same(ran, 1, 'ran once')
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t.same(val, { hello: 'world' })
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run(function (val) {
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t.same(ran, 1, 'ran once')
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t.same(val, { hello: 'world' })
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})
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})
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})
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})
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tape('callback is optional', function (t) {
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t.plan(2)
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var ran = 0
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var run = thunky(function (fn) {
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ran++
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fn({ hello: 'world' })
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})
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run()
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run(function (val) {
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t.same(ran, 1, 'ran once')
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t.same(val, { hello: 'world' })
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})
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})
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tape('always async', function (t) {
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t.plan(2)
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var run = thunky(function (cb) {
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process.nextTick(cb)
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})
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var sync = true
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run(function () {
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t.ok(!sync, 'not sync')
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var innerSync = true
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run(function () {
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t.ok(!innerSync, 'not sync')
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})
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innerSync = false
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})
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sync = false
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})
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