I have a module ./main.js that I am trying to test using ./__tests__/main-test.js. ./main.js uses new Regexp(REGEX, 'g') in one of its exported functions.

Running jest produces this error:

ReferenceError: Regexp is not defined

I thought it may be a mocking problem and added jest.unmock('Regexp') to main-test.js (even though it's not a required module), but got the same result.

What isn't Regexp defined?

I have a module ./main.js that I am trying to test using ./__tests__/main-test.js. ./main.js uses new Regexp(REGEX, 'g') in one of its exported functions.

Running jest produces this error:

ReferenceError: Regexp is not defined

I thought it may be a mocking problem and added jest.unmock('Regexp') to main-test.js (even though it's not a required module), but got the same result.

What isn't Regexp defined?

• javascript
• regex
• reactjs
• babeljs
• jestjs

1 Answer 1

Cause it should be RegExp , case sensitive, remember? otherwise the interpreter is searching for an object called Regexp which is not the desired RegExp constructor.