Created by: aisensiy

The jest just add a new configuration property watchPathIgnorePatterns in version 21.0.0+ which will ignore some path patterns in watch mode.

This configuration property make jest support tests which will generate a new file after running the test. Without this watch ignore property, any test which will generate a new file during test in watch mode will make a infinite loop for test. For example if I use pact-js in my create-react-app project. The pact-js test will generate a new pact file after running the pact contract test. I create a repository pact-integration-with-react-app to demonstrate this case. Run all the test in watch mode will show the infinite loop.

This is the document for the new watchPathIgnorePatterns in jest.