test.js
2.68 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
const chai = require('chai')
const sinon = require('sinon')
const sinonChai = require('sinon-chai')
const { expect } = chai
chai.use(sinonChai)
chai.should()
const asyncUtil = require('./index')
describe('asyncUtil', () => {
it('should catch exceptions of a function passed into it', async () => {
const error = new Error('catch me!')
const foo = asyncUtil(() => {
throw error
})
expect(foo).to.throw(error)
})
it('should call next with the error when an async function passed into it throws', async () => {
const error = new Error('catch me!')
const next = sinon.spy();
const foo = asyncUtil(async (req, res, next) => {
throw error
})
await foo(null, null, next)
expect(next).to.have.been.calledWith(error)
})
it('should call next with the arguments when an async function passed into it calls next', async () => {
const next = sinon.spy()
const foo = asyncUtil(async (req, res, next) => {
next('test')
})
await foo(null, null, next)
expect(next).to.have.been.calledWith('test')
})
it('should provide additional arguments to the middleware', async () => {
const next = sinon.spy()
const id = '1';
const foo = asyncUtil(async (req, res, next, id) => {
return id;
})
const result = await foo(null, null, next, id);
expect(result).to.equal(id);
})
it('should accept a non-async function', async () => {
const next = sinon.spy()
const foo = asyncUtil((req, res, next) => {
next('test')
})
await foo(null, null, next)
expect(next).to.have.been.calledWith('test')
})
it('should accept a non-async function erroring', async () => {
const error = new Error('catch me!')
const next = sinon.spy();
const foo = asyncUtil((req, res, next) => {
next(error)
})
await foo(null, null, next)
expect(next).to.have.been.calledWith(error)
})
// NB, thenables are not guaranteed to have a `catch` method.
it('should handle thenables', async () => {
const error = Error('catch me!')
// construct a minimalist thenable which we can fail at a specific time
let thenable, triggerFailure
const registeringThenable = new Promise(res => {
thenable = {
then: sinon.spy((success, fail) => {
triggerFailure = fail
res()
})
}
})
// test the actual library feature
const next = sinon.spy()
const catchingThenable = asyncUtil(_ => thenable)(null, null, next)
await registeringThenable
expect(thenable.then).to.have.been.called
expect(next).not.to.have.been.called
triggerFailure(error)
await catchingThenable
expect(next).to.have.been.calledWith(error)
})
})