jest-haste-map/src/lib/fast_path.js relative() return wrong path

[yamatatsu]

🐛 Bug Report

fast_path#relative() in jest-haste-map return sliced dir name, when filename start with words same rootDir.

ex)
dirname: foo/bar
filename: foo/barbaz/index.js

And relative() return az/index.js

To Reproduce

Steps to reproduce the behavior:

Expected behavior

When:
dirname: foo/bar
filename: foo/barbaz/index.js

And should get ../barbaz/index.js

Link to repl or repo (highly encouraged)

Please provide either a repl.it demo or a minimal repository on GitHub.

Issues without a reproduction link are likely to stall.

Run npx envinfo --preset jest

Paste the results here:

  System:
    OS: macOS High Sierra 10.13.6
    CPU: x64 Intel(R) Core(TM) i5-7267U CPU @ 3.10GHz
  Binaries:
    Node: 8.11.3 - ~/.config/fnm/bin/node
    Yarn: 1.10.1 - /usr/local/bin/yarn
    npm: 6.4.1 - /usr/local/bin/npm

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.