mkdirp module does not respect fs manual mock

[skevy]

Do you want to request a feature or report a bug?

Bug

What is the current behavior?

When mocking fs and using mkdirp within your codebase, mkdirp doesn't use the fs mock.

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal repository on GitHub that we can npm install and npm test.

https://github.com/skevy/jest-mkdirp-issue -- npm install && npm test, and then observe that 1) the test fails and 2) an actual directory is created in the folder that contains this repo.

What is the expected behavior?

Test should pass, and it should use the fake filesystem provided by the fs mock.

Run Jest again with --debug and provide the full configuration it prints. Please mention your node and npm version and operating system.

Node Version: 6.3.1
NPM Version: 3.10.3

jest version = 15.1.0
test framework = jasmine2
config = {
  "rootDir": "/Users/adam/Development/personal/projects/jest-mkdirp-issue",
  "name": "-Users-adam-Development-personal-projects-jest-mkdirp-issue",
  "setupFiles": [
    "/Users/adam/Development/personal/projects/jest-mkdirp-issue/node_modules/babel-polyfill/lib/index.js"
  ],
  "testRunner": "/Users/adam/Development/personal/projects/jest-mkdirp-issue/node_modules/jest-jasmine2/build/index.js",
  "scriptPreprocessor": "/Users/adam/Development/personal/projects/jest-mkdirp-issue/node_modules/babel-jest/build/index.js",
  "usesBabelJest": true,
  "preprocessorIgnorePatterns": [
    "/node_modules/"
  ],
  "automock": false,
  "bail": false,
  "browser": false,
  "cacheDirectory": "/var/folders/lx/3l8d75fd29v4pfg6l2jq017w0000gn/T/jest",
  "colors": false,
  "coveragePathIgnorePatterns": [
    "/node_modules/"
  ],
  "coverageReporters": [
    "json",
    "text",
    "lcov",
    "clover"
  ],
  "globals": {},
  "haste": {
    "providesModuleNodeModules": []
  },
  "mocksPattern": "__mocks__",
  "moduleDirectories": [
    "node_modules"
  ],
  "moduleFileExtensions": [
    "js",
    "json",
    "node"
  ],
  "moduleNameMapper": {},
  "modulePathIgnorePatterns": [],
  "noStackTrace": false,
  "notify": false,
  "preset": null,
  "resetModules": false,
  "testEnvironment": "jest-environment-jsdom",
  "testPathDirs": [
    "/Users/adam/Development/personal/projects/jest-mkdirp-issue"
  ],
  "testPathIgnorePatterns": [
    "/node_modules/"
  ],
  "testRegex": "(/__tests__/.*|\\.(test|spec))\\.js$",
  "testURL": "about:blank",
  "timers": "real",
  "useStderr": false,
  "verbose": null,
  "watch": false,
  "cache": true,
  "watchman": true,
  "testcheckOptions": {
    "times": 100,
    "maxSize": 200
  }
}

[skevy]

cc @cpojer

[cpojer]

yay we fixed this. Nice work @skevy.

[github-actions]

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