#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/javascript/testing-javascript/testing-for-errors

░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░█████████████████████████████████████████████████████████████████████████████

#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/javascript/testing-javascript/testing-for-errors

Repovive

Testing for Errors - Testing JavaScript | JavaScript | Repovive

Repovive.

JavaScript22 sections · 783 units18h total

Open in Course

Testing for Errors

Verify code throws correctly

Test that functions throw errors when expected:

function divide(a, b) {
  if (b === 0) throw new Error('Division by zero');
  return a / b;
}

test('throws on division by zero', () => {
  expect(() => divide(1, 0)).toThrow();
  expect(() => divide(1, 0)).toThrow('Division by zero');
});

Wrap the call in a function so Jest can catch the error.