Write better unit tests in JS or TS thanks to a new set of rules dedicated to Mocha and Chai

Sonar Updates
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Hello JavaScript, TypeScript developers,

We believe that test code quality is as important as main code quality. This is why we just released a set of rules to help you write better tests with Mocha or Chai.

Rules dedicated to Mocha:

  • S6079: Tests should not execute any code after “done()” is called
  • S6080: Mocha timeout should be disabled by setting it to “0”

Rules dedicated to Chai:

  • S5863: Assertions should not be given twice the same argument
  • S3415: Assertion arguments should be passed in the correct order
  • S2970: Assertions should be complete
  • S6092: Chai assertions should have only one reason to succeed

Rules for Mocha and Chai:

  • S2699: Tests should include assertions
  • S5958: Tests should check which exception is thrown

These rules are available now on SonarCloud.io and are part of the recently released SonarQube 9.2.

Enjoy!
Alex

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