Myujth

In a create-react-app/react-scripts@2.1.1 project, I'm trying to generate a coverage report using jest-junit. Unfortunately, it fails with the following:

$ yarn run test --coverage
 Failed to write coverage reports:
 ERROR: Error: Invalid report format [jest-junit]
 STACK: Error: Invalid report format [jest-junit]
 at Object.module.exports.create (D:UsersusernameDocumentsProjectnode_modulesistanbul-apilibinput-error.js:6:15)
 at Reporter.add (D:UsersusernameDocumentsProjectnode_modulesistanbul-apilibreporter.js:51:30)
 at D:UsersusernameDocumentsProjectnode_modulesistanbul-apilibreporter.js:62:18
 at Array.forEach (<anonymous>)
 at Reporter.addAll (D:UsersusernameDocumentsProjectnode_modulesistanbul-apilibreporter.js:61:14)
 at D:UsersusernameDocumentsProjectnode_modulesjest-clibuildreporterscoverage_reporter.js:180:18
 at Generator.next (<anonymous>)
 at step (D:UsersusernameDocumentsProjectnode_modulesjest-clibuildreporterscoverage_reporter.js:75:30)
 at D:UsersusernameDocumentsProjectnode_modulesjest-clibuildreporterscoverage_reporter.js:86:15
 at process._tickCallback (internal/process/next_tick.js:68:7)

I encounter no errors if I run yarn run test. The following configuration block was added to the project's package.json file:

 ...
 "jest": 
 "collectCoverageFrom": [
 "src/**/*.js,jsx,ts,tsx",
 "!src/**/*.d.ts",
 "!src/**/__stories__/",
 "!<rootDir>/node_modules/"
 ],
 "coverageReporters": [
 "jest-junit"
 ]
 
 ...

Has anyone successfully configured jest-junit in a create-react-app@2 project?

Thanks to @jonrsharpe for the quick comment. I wasn't paying close enough attention... my mistake was dropping jest-junit into coverageReporters (as opposed to reporters).

Unfortunately, create-react-app@2 does not appear to support a custom reporters configuration in package.json. Interestingly, the following command works:

$ yarn run test --coverage --reporters=default --reporters=jest-junit

I'm used to most of create-react-app's configs overriding any explicitly defined options. However, it appears an exception (or loophole?) exists for yarn run test. With the above, I get the desired junit.xml file.