Jest transformIgnorePatterns not working
The transformIgnorePatterns didn't work for me until I changed my .babelrc to babel.config.js, like this:
module.exports = { "presets": [ "@babel/preset-env" ]};as seen on this comment: https://github.com/facebook/jest/issues/6229#issuecomment-403539460
As a workaround for now I have changed my config to use the moduleNameMapper option to load a mock class for that library instead. I would have preferred to use transformIgnorePatterns instead so would still appreciate any ideas.
New config:
module.exports = { moduleNameMapper: { '\\.(css|scss)$': 'identity-obj-proxy', '\\.svg$': '<rootDir>/test/mocks/svg-mock.js', 'mathletics-portal-communication-service': '<rootDir>/test/mocks/mathletics-portal-communication-service-mock.js' }, setupFiles: ['./test/test-setup.js']};
Adding trailing slash fix this for me:
{ // ... transformIgnorePatterns: [ '<rootDir>/node_modules/(?!mathletics-portal-communication-service/)' ]};