How to write a Jest configuration file

Question

I am trying to pass along a configuration file to Jest in order to run tests only from a given directory.

According to documentation, you can use config.testPathDi

Answer 1

For JEST V20+:

{
 "roots": ["__tests__/"]
}

For v 20-, you will get following warning if you use testPathDirs:

Deprecation Warning:

Option "testPathDirs" was replaced by "roots".

Jest now treats your current configuration as: { "roots": ["tests/unit/"] }

Please update your configuration.