TypeError: TextDecoder is not a constructor

[C0ZEN]

Summary

Having the error TypeError: TextDecoder is not a constructor.

Stryker config

{
  "$schema": "https://raw.githubusercontent.com/stryker-mutator/stryker/master/packages/api/schema/stryker-core.json",
  "mutator": "typescript",
  "packageManager": "npm",
  "reporters": [
    "clear-text",
    "progress",
    "dots",
    "html"
  ],
  "testRunner": "jest",
  "transpilers": [
    "typescript"
  ],
  "coverageAnalysis": "off",
  "tsconfigFile": "tsconfig.json",
  "mutate": [
    "src/**/*.ts",
    "!src/**/*.spec.ts",
    "!src/**/__mocks__/*.spec.ts",
    "!src/**/__mocks__/"
  ],
  "allowConsoleColors": true,
  "dashboard": {
    "baseUrl": "https://dashboard.stryker-mutator.io/api/reports",
    "reportType": "full"
  },
  "fileLogLevel": "info",
  "logLevel": "info",
  "symlinkNodeModules": true,
  "tempDirName": "stryker-tmp",
  "timeoutFactor": 2,
  "timeoutMS": 5000,
  "plugins": [
    "@stryker-mutator/*"
  ]
}

Test runner config (jest.config.js)

// For a detailed explanation regarding each configuration property, visit:
// https://jestjs.io/docs/en/configuration.html

module.exports = {
  // All imported modules in your tests should be mocked automatically
  automock: false,

  // Stop running tests after `n` failures
  bail: false,

  // Respect "browser" field in package.json when resolving modules
  // browser: false,

  cache: true,

  // The directory where Jest should store its cached dependency information
  cacheDirectory: `./.cache-jest`,

  // Automatically clear mock calls and instances between every test
  clearMocks: true,

  // Indicates whether the coverage information should be collected while executing the test
  collectCoverage: false,

  // An array of glob patterns indicating a set of files for which coverage information should be collected
  // collectCoverageFrom: undefined,

  // The directory where Jest should output its coverage files
  coverageDirectory: `coverage`,

  // An array of regexp pattern strings used to skip coverage collection
  // coveragePathIgnorePatterns: [
  //   "\\\\node_modules\\\\"
  // ],

  // A list of reporter names that Jest uses when writing coverage reports
  coverageReporters: [`json`, `text-summary`, `lcov`],

  // An object that configures minimum threshold enforcement for coverage results
  // coverageThreshold: undefined,

  // A path to a custom dependency extractor
  // dependencyExtractor: undefined,

  displayName: {
    color: `magenta`,
    name: `Sonia`,
  },

  // Make calling deprecated APIs throw helpful error messages
  errorOnDeprecated: true,

  // Force coverage collection from ignored files using an array of glob patterns
  // forceCoverageMatch: [],

  // A path to a module which exports an async function that is triggered once before all test suites
  // globalSetup: undefined,

  // A path to a module which exports an async function that is triggered once after all test suites
  // globalTeardown: undefined,

  // A set of global variables that need to be available in all test environments
  globals: {
    "ts-jest": {
      compiler: `ttypescript`,
    },
  },

  // The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
  // maxWorkers: "50%",

  maxConcurrency: 5,

  // An array of directory names to be searched recursively up from the requiring module's location
  moduleDirectories: [`./node_modules`],

  // A map from regular expressions to module names that allow to stub out resources with a single module
  // moduleNameMapper: {},

  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
  // modulePathIgnorePatterns: [],

  // An array of file extensions your modules use
  moduleFileExtensions: [`js`, `json`, `ts`, `node`],

  // Activates notifications for test results
  notify: true,

  // An enum that specifies notification mode. Requires { notify: true }
  notifyMode: `failure-change`,

  // Run tests from one or more projects
  // projects: undefined,

  // A preset that is used as a base for Jest's configuration
  preset: `ts-jest/presets/js-with-ts`,

  prettierPath: `prettier`,

  // Use this configuration option to add custom reporters to Jest
  reporters: [
    [
      `jest-silent-reporter`,
      {
        showPaths: true,
        showWarnings: true,
        useDots: true,
      },
    ],
  ],

  // Automatically reset mock state between every test
  resetMocks: true,

  // A path to a custom resolver
  // resolver: undefined,

  // Reset the module registry before running each individual test
  resetModules: false,

  // The root directory that Jest should scan for tests and modules within
  // rootDir: undefined,

  // Automatically restore mock state between every test
  restoreMocks: true,

  // Allows you to use a custom runner instead of Jest's default test runner
  // runner: "jest-runner",

  // A list of paths to directories that Jest should use to search for files in
  roots: [`./src`, `./scripts`],

  // The paths to modules that run some code to configure or set up the testing environment before each test
  setupFiles: [`./config.ts`],

  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
  // snapshotSerializers: [],

  // Prevent tests from printing messages through the console
  silent: true,

  // A list of paths to modules that run some code to configure or set up the testing framework before each test
  // setupFilesAfterEnv: [`./__tests__/setup.js`],

  // The test environment that will be used for testing
  testEnvironment: `node`,

  // Options that will be passed to the testEnvironment
  // testEnvironmentOptions: {},

  // Adds a location field to test results
  // testLocationInResults: false,

  // The glob patterns Jest uses to detect test files
  // testMatch: [
  //   "**/__tests__/**/*.[jt]s?(x)",
  //   "**/?(*.)+(spec|test).[tj]s?(x)"
  // ],

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  // testPathIgnorePatterns: [
  //   "\\\\node_modules\\\\"
  // ],

  // The regexp pattern or array of patterns that Jest uses to detect test files
  // testRegex: [],

  // This option allows the use of a custom results processor
  // testResultsProcessor: undefined,

  // This option allows use of a custom test runner
  // testRunner: "jasmine2",

  // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
  // testURL: "http://localhost",

  testTimeout: 5000,

  // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
  timers: `fake`,

  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
  // transformIgnorePatterns: [
  //   "\\\\node_modules\\\\"
  // ],

  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
  // unmockedModulePathPatterns: undefined,

  // A map from regular expressions to paths to transformers
  transform: {
    ".ts": `ts-jest`,
  },

  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
  // watchPathIgnorePatterns: [],

  // Indicates whether each individual test should be reported during the run
  verbose: true,

  // Whether to use watchman for file crawling
  watchman: true,
};

Stryker environment

+-- "@stryker-mutator/core": "3.2.4"
+-- "@stryker-mutator/jest-runner": "3.2.4"
+-- "@stryker-mutator/typescript": "3.2.4"

+-- "jest": "26.0.1"
+-- "ts-jest": "26.0.0"
+-- "discord.js": "12.2.0"

Test runner environment

stryker run

Your Environment

software	version(s)
node	13.7.0
npm	6.14.4
Operating System	Windows 10 64bits

Add stryker.log

stryker.log

My repo issue: https://github.com/Sonia-corporation/il-est-midi-discord/issues/459

[C0ZEN]

Does someone can tell me at least if the error is fixable from Stryker or not? I do not know after two months now if this is the right place for this issue. Clearly Stryker and discord.js are not compatible but both can eventually add a fix. Maybe the way discord.js export stuff is not yet handled by Stryker or on the other maybe that discord.js is fucked up at some point in the exports so both can fix this - eventually -.

[C0ZEN]

Fixed. See https://github.com/Sonia-corporation/sonia-discord/issues/459

[nicojs]

Great to hear you managed to get Stryker working! Sorry for not responding 😟

Thanks for reporting back as well.

[C0ZEN]

@nicojs no problem I understand completely. I think it should be hard to maintain and time consuming. Plus it's open-source so no need to be sorry for this 😄