我已经检查了关于stackoverflow的其他问题，但是没有一个解决方案在起作用，这就是为什么我重复这个问题。
正如标题所示，运行测试用例时出现错误。我尚未在设备上运行它。
我还尝试了https://github.com/facebook/react-native/issues/5747上建议的各种方法。但是我没有成功。
我的实用程序js文件如下 sanity.js
/**
* Constants for type of object passed
*/
export const TYPE_OF = {
STRING: 'string',
FUNCTION: 'function',
UNDEFINED: 'undefined',
BLANK: '',
NULL: 'null',
NEGATIVE_INDEX: -1
}
/**
* Checks whether any parameters passed is null or not.
* @param {...any} params that needs to be checked
* @returns {boolean} true if any one param is null
*/
export function isNull(...params) {
for (let i = 0; i < params.length; i = i + 1) {
if (TYPE_OF.UNDEFINED === typeof params[i] || TYPE_OF.NULL === typeof params[i]) {
return true
}
}
return false
}
/**
* Checks whether all parameters passed is function or not
* @param {...any} params that needs to be checked
* @returns {boolean} true if all params are function
*/
export function isFunction(...params) {
for (let i = 0; i < params.length; i = i + 1) {
if (TYPE_OF.FUNCTION !== typeof params[i]) {
return false
}
}
return false
}
/**
* Checkes whether all parameters passed is string or not
* @param {...any} params that needs to be checked
* @returns {boolean} true of all params are string
*/
export function isString(...params) {
for (let i = 0; i < params.length; i = i + 1) {
if (TYPE_OF.STRING !== typeof params[i]) {
return false
}
}
return false
}
下面是使用笑话的测试案例 sanity.test.js
import { isNull, isFunction, isString } from '../../src/utils/sanity.js'
describe('check for nulls', () => {
it('none of the arguments are null', () => {
let var1 = ''
let var2 = 'abc'
let var3 = ['1', '2']
let booleanValue = isNull(var1, var2, var3)
expect(booleanValue).toEqual(false)
})
it('one of the arguments is null', () => {
let var1
let var2 = 'abc'
let var3 = ['1', '2']
let booleanValue = isNull(var1, var2, var3)
expect(booleanValue).toEqual(true)
})
})
describe('check for functions', () => {
it('all the arguments are function', () => {
let var1 = jest.fn()
let var2 = jest.fn()
let booleanValue = isFunction(var1, var2)
expect(booleanValue).toEqual(true)
})
it('not all the arguments are function', () => {
let var1 = jest.fn()
let var2 = jest.fn()
let var3 = '3'
let booleanValue = isFunction(var1, var2, var3)
expect(booleanValue).toEqual(false)
})
})
describe('check for strings', () => {
it('all the arguments are string', () => {
let var1 = ''
let var2 = '2'
let booleanValue = isString(var1, var2)
expect(booleanValue).toEqual(true)
})
it('not all the arguments are string', () => {
let var1 = 'abc'
let var2
let var3 = '3'
let booleanValue = isString(var1, var2, var3)
expect(booleanValue).toEqual(false)
})
})
在我的package.json中，我有以下事情-
{
"dependencies": {
"prop-types": "^15.6.2",
"react": "16.4.1",
"react-native": "^0.56.1",
"react-navigation": "^2.13.0"
},
"devDependencies": {
"@babel/cli": "^7.0.0",
"@babel/core": "^7.0.0",
"@babel/preset-env": "^7.0.0",
"@babel/preset-react": "^7.0.0",
"babel-core": "^7.0.0-bridge.0",
"babel-eslint": "^9.0.0",
"babel-jest": "^23.6.0",
"babel-preset-react-native": "^5.0.2",
"babel-preset-stage-1": "^6.24.1",
"enzyme": "^3.6.0",
"enzyme-adapter-react-16": "^1.5.0",
"enzyme-to-json": "^3.3.4",
"eslint": "^4.19.1",
"eslint-config-airbnb": "^17.1.0",
"eslint-plugin-import": "^2.14.0",
"eslint-plugin-jsx-a11y": "^6.1.1",
"eslint-plugin-react": "^7.11.1",
"eslint-plugin-react-native": "^3.2.1",
"jest": "23.5.0",
"jest-cli": "^22.4.4",
"jest-sonar-reporter": "^2.0.0",
"jest-static-stubs": "0.0.1",
"jsdoc": "^3.5.5",
"react-dom": "^16.5.0",
"react-test-renderer": "16.4.1",
"regenerator-runtime": "^0.12.1"
},
"jest": {
"preset": "react-native",
"testResultsProcessor": "jest-sonar-reporter"
},
"jestSonar": {
"sonar56x": true
}
}
我的.babelrc当前看起来像这样-
{
"presets": ["@babel/preset-env", "@babel/preset-react", "react-native"]
}
当我进行测试时，这就是我得到的-
FAIL __test__/utils/sanity.test.js
check for nulls
✕ none of the arguments are null (4ms)
✕ one of the arguments is null (1ms)
check for functions
✕ all the arguments are function
✕ not all the arguments are function (1ms)
check for strings
✕ all the arguments are string
✕ not all the arguments are string (1ms)
● check for nulls › none of the arguments are null
TypeError: babelHelpers.typeof is not a function
19 | export function isNull(...params) {
20 | for (let i = 0; i < params.length; i = i + 1) {
> 21 | if (TYPE_OF.UNDEFINED === typeof params[i] || TYPE_OF.NULL === typeof params[i]) {
22 | return true
23 | }
24 | }
at isNull (src/utils/sanity.js:21:104)
at Object.<anonymous> (__test__/utils/sanity.test.js:8:43)
● check for nulls › one of the arguments is null
TypeError: babelHelpers.typeof is not a function
19 | export function isNull(...params) {
20 | for (let i = 0; i < params.length; i = i + 1) {
> 21 | if (TYPE_OF.UNDEFINED === typeof params[i] || TYPE_OF.NULL === typeof params[i]) {
22 | return true
23 | }
24 | }
at isNull (src/utils/sanity.js:21:104)
at Object.<anonymous> (__test__/utils/sanity.test.js:16:43)
● check for functions › all the arguments are function
TypeError: babelHelpers.typeof is not a function
33 | export function isFunction(...params) {
34 | for (let i = 0; i < params.length; i = i + 1) {
> 35 | if (TYPE_OF.FUNCTION !== typeof params[i]) {
36 | return false
37 | }
38 | }
at isFunction (src/utils/sanity.js:35:49)
at Object.<anonymous> (__test__/utils/sanity.test.js:24:47)
● check for functions › not all the arguments are function
TypeError: babelHelpers.typeof is not a function
33 | export function isFunction(...params) {
34 | for (let i = 0; i < params.length; i = i + 1) {
> 35 | if (TYPE_OF.FUNCTION !== typeof params[i]) {
36 | return false
37 | }
38 | }
at isFunction (src/utils/sanity.js:35:49)
at Object.<anonymous> (__test__/utils/sanity.test.js:32:47)
● check for strings › all the arguments are string
TypeError: babelHelpers.typeof is not a function
47 | export function isString(...params) {
48 | for (let i = 0; i < params.length; i = i + 1) {
> 49 | if (TYPE_OF.STRING !== typeof params[i]) {
50 | return false
51 | }
52 | }
at isString (src/utils/sanity.js:49:47)
at Object.<anonymous> (__test__/utils/sanity.test.js:40:45)
● check for strings › not all the arguments are string
TypeError: babelHelpers.typeof is not a function
47 | export function isString(...params) {
48 | for (let i = 0; i < params.length; i = i + 1) {
> 49 | if (TYPE_OF.STRING !== typeof params[i]) {
50 | return false
51 | }
52 | }
at isString (src/utils/sanity.js:49:47)
at Object.<anonymous> (__test__/utils/sanity.test.js:48:45)
答案 0 :(得分：2)
我在sanity.js，.babelrc文件中进行了调整，并开始工作。获得的经验教训是在添加任何软件包或更改babel之后，使用以下命令：
我在脚本package.json
"reset": "watchman watch-del-all && react-native start --reset-cache"
并且每次配置更改后，我都在运行npm run reset
sanity.js
/**
* Constants for type of object passed
*/
export const TYPE_OF = {
BLANK: '',
NEGATIVE_INDEX: -1
}
/**
* Checks whether any parameters passed is null or not.
* @param {...any} params that needs to be checked
* @returns {boolean} true if any one param is null
*/
export function isNull(...params) {
for (let i = 0; i < params.length; i = i + 1) {
if (params[i] === null || params[i] === undefined) { // eslint-disable-line
return true
}
}
return false
}
/**
* Checks whether all parameters passed is function or not
* @param {...any} params that needs to be checked
* @returns {boolean} true if all params are function
*/
export function isFunction(...params) {
for (let i = 0; i < params.length; i = i + 1) {
if (isNull(params[i]) || params[i] && {}.toString.call(params[i]) !== '[object Function]') {
return false
}
}
return true
}
/**
* Checkes whether all parameters passed is string or not
* @param {...any} params that needs to be checked
* @returns {boolean} true of all params are string
*/
export function isString(...params) {
for (let i = 0; i < params.length; i = i + 1) {
if (isNull(params[i]) || params[i] && {}.toString.call(params[i]) !== '[object String]') {
return false
}
}
return true
}
我的.babelrc现在看起来像这样
{
"presets": ["react-native"]
}