SyntaxError: Cannot use import statement outside a module

[yxtao]

Question

Can Stryker.conf.json file override the default transformIgnorePattern in Jest ?

In Stryker.conf.json ,

testRunnerNodeArgs": ["--experimental-vm-modules"], 
"jest":{ 
     "projectType" : "custom",
      "config" : {
              "testEnvironment":"jest-environment-jsdom-sixteen",
               "transform":{}
       }
}

When I run npx stryker run, it shows that import and export are not supported. SyntaxError: Cannot use import statement outside a module. This points to several packages in node modules. So I added { "transformIgnorePatterns": ["/node_modules/(?!(nodePackage1|nodePackage2)/)"] } to the stryker.conf.json file under the “jest”/“config” section, but it didn’t solve the issue.

testRunnerNodeArgs": ["--experimental-vm-modules"], 
"jest":{ 
     "projectType" : "custom",
      "config" : {
              "testEnvironment":"jest-environment-jsdom-sixteen",
               "transform":{},
                "transformIgnorePatterns": ["/node_modules/(?!(nodePackage1|nodePackage2)/)"]
       }
}

Stryker environment

+-- @stryker-mutator/[email protected]

+-- @stryker-mutator/jest-runner@ 6.2.0-beta.0 

Additional context

It is a react project

[nicojs]

What is your normal npm test command? And what is your jest config (if you have any)

If it's a normal "react-scripts" project, than this config should work:

{
  "jest": {
    "projectType": "create-react-app",
    "config": {
        "here-you-can-override-any-jest-option":{}
     }
  }
}

The error about import and export is coming from the wrong babel transpiling would be my guess. This means that you should not use --experimental-vm-modules or override any options, setting the project type to "create-react-app" should be enough.

[crystalfp]

I have the same problem in the stryker generated file test.js:

({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import path from 'path';
                                                                                  ^^^^^^
SyntaxError: Cannot use import statement outside a module

and this configuration:

{
  "$schema": "./node_modules/@stryker-mutator/core/schema/stryker-schema.json",
  "_comment": "This config was generated using 'stryker init'. Please take a look at: https://stryker-mutator.io/docs/stryker-js/configuration/ for more information.",
  "packageManager": "npm",
  "reporters": [
    "html",
    "clear-text",
    "progress",
    "dashboard"
  ],
  "testRunner": "jest",
  "testRunner_comment": "Take a look at https://stryker-mutator.io/docs/stryker-js/jest-runner for information about the jest plugin.",
  "coverageAnalysis": "perTest",
  "ignorePatterns": ["dist", "coverage", "tests", "runtime", "http", "config", "v8coverage"]
}

The application is a server written in TypeScript. Normal testing works using the following command:

npx jest --config jest.config.json --runInBand

with the following configuration:

{
  "rootDir": "..",
  "testEnvironment": "node",
  "verbose": true,
  "testMatch": ["**/tests/*.test.ts"],
  "moduleFileExtensions": ["ts", "js"],
  "extensionsToTreatAsEsm": [".ts"],
  "transformIgnorePatterns": ["!../common/", "!server/", "!./"],
  "transform": {
    "^.+\\.ts$": ["ts-jest", {
      "tsconfig": "tests/tsconfig.json",
      "diagnostics": {"ignore": [1343]}
	  }]
  },
  "setupFilesAfterEnv": ["jest-extended/all"],
  "collectCoverage": false,
  "collectCoverageFrom": [
    "server/*.ts",
    "common/*.ts"
  ],
  "coveragePathIgnorePatterns": [".d.ts", "iie.ts", "node_modules", "save", "WordStatistics.ts"],
  "coverageDirectory": "coverage",
  "coverageReporters": ["text", "json-summary", "html"]
}

(Windows 11, jest 29.3.1, "@stryker-mutator/core": "^6.3.1", node 18.13.0) It is my first attempt at stryker. Any idea? Thanks! mario

[crystalfp]

Red face. Was a test file outside the project source directory. Added to ignorePatterns solved the problem. Sorry for the noise! mario

[stale[bot]]

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