javascript - Stryker 和 Jest 的麻烦
问题描述
我正在用 Jest 测试 Stryker。Stryker 似乎不适用 Jest 测试。
如果我在代码中手动引入这两个突变体,它们不会通过测试,但是当我使用 Stryker 时它们通过了测试。
测试似乎不适用于突变体。我怎样才能让它工作?
这是我的配置:
包.json:
{
"name": "test-stryker",
"version": "1.0.0",
"description": "",
"main": "src/index.js",
"scripts": {
"test": "jest",
"test-mutation": "stryker run"
},
"author": "",
"license": "ISC",
"devDependencies": {
"npm": "^6.0.0",
"@stryker-mutator/javascript-mutator": "^3.3.0",
"@stryker-mutator/jest-runner": "^3.3.0",
"jest": "^26.0.0",
"jest-cli": "^26.0.0"
}
}
config.jest.js :
'use strict'
module.exports = {
clearMocks: true,
collectCoverage: true,
collectCoverageFrom: [
'**/*.js',
'!**/reports/**/*.js',
'!**/test/**/*.js',
'!/node_modules/',
'!**/*.config.js',
'!**/*.conf.js'
],
coverageDirectory: 'reports/coverage',
testEnvironment: 'node'
}
stryker.conf.js :
/**
* @type {import('@stryker-mutator/api/core').StrykerOptions}
*/
module.exports = {
mutator: "javascript",
reporters: ["html", "clear-text", "progress"],
testRunner: "jest",
coverageAnalysis: "off",
jest: {
configFile: "jest.config.js",
},
};
sum.js:
'use strict'
module.exports = (a, b) => {
return a + b
}
sum.test.js:
'use strict'
const sum = require('../../src/sum')
describe('sum', () => {
test('With two values should return two values added.', () => {
expect(sum(5,2)).toBe(7)
})
})
这是结果:
16:23:30 (21936) INFO ConfigReader Using stryker.conf.js
16:23:31 (21936) INFO InputFileResolver Found 1 of 12 file(s) to be mutated.
16:23:31 (21936) INFO InitialTestExecutor Starting initial test run. This may take a while.
16:23:35 (21936) INFO InitialTestExecutor Initial test run succeeded. Ran 1 tests in 4 seconds (net 3 ms, overhead 2707 ms).
16:23:35 (21936) INFO MutatorFacade 2 Mutant(s) generated
16:23:35 (21936) INFO SandboxPool Creating 4 test runners (based on CPU count)
Mutation testing [==================================================] 100% (elapsed: <1m, remaining: n/a) 2/2 tested (2 survived, 0 timed out)
0. [Survived] ArithmeticOperator
C:\webdev\experiment\node\test-stryker\src\sum.js:3:11
- return a + b
+ return a - b
1. [Survived] BlockStatement
C:\webdev\experiment\node\test-stryker\src\sum.js:2:27
- module.exports = (a, b) => {
- return a + b
- }
+ module.exports = (a, b) => {}
Ran 0.00 tests per mutant on average.
----------|---------|----------|-----------|------------|----------|---------|
File | % score | # killed | # timeout | # survived | # no cov | # error |
----------|---------|----------|-----------|------------|----------|---------|
All files | 0.00 | 0 | 0 | 2 | 0 | 0 |
sum.js | 0.00 | 0 | 0 | 2 | 0 | 0 |
----------|---------|----------|-----------|------------|----------|---------|
解决方案
我遇到了同样的问题,发现显然是这个问题:https ://github.com/stryker-mutator/stryker/issues/1566
也就是说,jest 的“查找相关测试”功能似乎不适用于 Windows。当我将其添加到以下内容时,Stryker 为我工作stryker.config.json
:
"jest": { "enableFindRelatedTests" : false }
但是,这对于大型项目的性能当然是非常不利的。也许通过一些额外的研究,该功能可以发挥作用。我不确定这是开玩笑的普遍问题还是仅在由史崔克驾驶时才会发生。
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