How do I unit test custom validators in my application?

How do I unit test custom validators in my application?

To unit test custom validators, you can create test cases that simulate different input scenarios and validate the output.

Can you show me an example of a test case for a custom validator?

Sure! If you have a validator that checks if a string is an email, you can write a test like this:

test('valid email', () => {
  expect(validateEmail('[email protected]')).toBe(true);
});

What testing framework should I use for this?

You can use popular testing frameworks like Jest, Mocha, or Jasmine. Jest is particularly user-friendly for unit testing.

Are there any best practices for writing these tests?

Yes! Some best practices include testing edge cases, keeping tests isolated, and using descriptive test names.