Zengtudor/Nuxt
1
0
Fork 0
mirror of https://github.com/nuxt/nuxt.git synced 2024-11-23 14:15:13 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add tests for chainFn

Browse Source
This commit is contained in:
Ivan Nikulin 2017-08-23 00:50:27 +02:00
parent 2336b3e6ea
commit 9c39c128f2
No known key found for this signature in database
GPG Key ID: F800F559F11A1A10
2 changed files with 64 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lib/common/utils.js
View File

@ -72,6 +72,7 @@ export function chainFn (base, fn) {
if (!(fn instanceof Function)) {
return
}
return function () {
if (typeof base !== 'function') {
return fn.apply(this, arguments)
}
@ -80,13 +81,14 @@ export function chainFn (base, fn) {
if (baseResult === undefined) {
baseResult = arguments[0]
}
let fnResult = fn.call(this, baseResult, ...arguments.slice(1))
let fnResult = fn.call(this, baseResult, ...Array.prototype.slice.call(arguments, 1))
// Return mutated argument if no result was returned
if (fnResult === undefined) {
return baseResult
}
return fnResult
}
}
export function isPureObject (o) {
return !Array.isArray(o) && typeof o === 'object'

49
test/utils.test.js
View File

@ -94,3 +94,52 @@ test('promisifyRoute (fn(cb) with result)', t => {
t.is(res, array)
})
})
test('chainFn (mutate, mutate)', t => {
// Pass more than one argument to test that they're actually taken into account
const firstFn = function (obj, count) {
obj.foo = count + 1
}
const secondFn = function (obj, count) {
obj.bar = count + 2
}
const chainedFn = Utils.chainFn(firstFn, secondFn)
const expectedResult = { foo: 11, bar: 12 }
t.deepEqual(chainedFn({}, 10), expectedResult)
})
test('chainFn (mutate, return)', t => {
const firstFn = function (obj, count) {
obj.foo = count + 1
}
const secondFn = function (obj, count) {
return Object.assign({}, obj, { bar: count + 2 })
}
const chainedFn = Utils.chainFn(firstFn, secondFn)
const expectedResult = { foo: 11, bar: 12 }
t.deepEqual(chainedFn({}, 10), expectedResult)
})
test('chainFn (return, mutate)', t => {
const firstFn = function (obj, count) {
return Object.assign({}, obj, { foo: count + 1 })
}
const secondFn = function (obj, count) {
obj.bar = count + 2
}
const chainedFn = Utils.chainFn(firstFn, secondFn)
const expectedResult = { foo: 11, bar: 12 }
t.deepEqual(chainedFn({}, 10), expectedResult)
})
test('chainFn (return, return)', t => {
const firstFn = function (obj, count) {
return Object.assign({}, obj, { foo: count + 1 })
}
const secondFn = function (obj, count) {
return Object.assign({}, obj, { bar: count + 2 })
}
const chainedFn = Utils.chainFn(firstFn, secondFn)
const expectedResult = { foo: 11, bar: 12 }
t.deepEqual(chainedFn({}, 10), expectedResult)
})