source: trip-planner-front/node_modules/thunky/test.js@ 6c1585f

Last change on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.0 KB
Line 
1var tape = require('tape')
2var thunky = require('./')
3
4tape('run only once', function (t) {
5 t.plan(3)
6
7 var ran = 0
8 var run = thunky(function (cb) {
9 ran++
10 cb()
11 })
12
13 run(function () {
14 t.same(ran, 1, 'ran once')
15 })
16 run(function () {
17 t.same(ran, 1, 'ran once')
18 })
19 run(function () {
20 t.same(ran, 1, 'ran once')
21 })
22})
23
24tape('run only once async', function (t) {
25 t.plan(3)
26
27 var ran = 0
28 var run = thunky(function (cb) {
29 process.nextTick(function () {
30 ran++
31 cb()
32 })
33 })
34
35 run(function () {
36 t.same(ran, 1, 'ran once')
37 })
38 run(function () {
39 t.same(ran, 1, 'ran once')
40 })
41 run(function () {
42 t.same(ran, 1, 'ran once')
43 })
44})
45
46tape('re-run on error', function (t) {
47 t.plan(3)
48
49 var ran = 0
50 var run = thunky(function (cb) {
51 ran++
52 cb(new Error('stop'))
53 })
54
55 run(function () {
56 t.same(ran, 1, 'ran once')
57 run(function () {
58 t.same(ran, 2, 'ran once')
59 run(function () {
60 t.same(ran, 3, 'ran once')
61 })
62 })
63 })
64})
65
66tape('pass arguments', function (t) {
67 t.plan(6)
68
69 var ran = 0
70 var run = thunky(function (fn) {
71 ran++
72 fn({ hello: 'world' })
73 })
74
75 run(function (val) {
76 t.same(ran, 1, 'ran once')
77 t.same(val, { hello: 'world' })
78 run(function (val) {
79 t.same(ran, 1, 'ran once')
80 t.same(val, { hello: 'world' })
81 run(function (val) {
82 t.same(ran, 1, 'ran once')
83 t.same(val, { hello: 'world' })
84 })
85 })
86 })
87})
88
89tape('callback is optional', function (t) {
90 t.plan(2)
91
92 var ran = 0
93 var run = thunky(function (fn) {
94 ran++
95 fn({ hello: 'world' })
96 })
97
98 run()
99 run(function (val) {
100 t.same(ran, 1, 'ran once')
101 t.same(val, { hello: 'world' })
102 })
103})
104
105tape('always async', function (t) {
106 t.plan(2)
107
108 var run = thunky(function (cb) {
109 process.nextTick(cb)
110 })
111
112 var sync = true
113 run(function () {
114 t.ok(!sync, 'not sync')
115 var innerSync = true
116 run(function () {
117 t.ok(!innerSync, 'not sync')
118 })
119 innerSync = false
120 })
121 sync = false
122})
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