There is a way to intercept all custom errors messages?

[djom202]

Hi,

Currently I'm working on set an explicit message into the reports from protractor with chai, I know that we can set a custom message on the expects but my goal is just put the just our message and I got actually something like that: AssertionError: The create application button was not found: expected false to be true, so I need to remove 2 things for all the errors:

1. AssertionError:
2. expected false to be true

Is there a way to access to the message or use chai.use or anything else to remove these parts from the errors messages without overwrite all of them each one by one?

Thanks

[ljluestc]

const chai = require('chai');

function customErrorMessages(chai, utils) {
  const Assertion = chai.Assertion;

  // Store the original assert method
  const originalAssert = Assertion.prototype.assert;

  // Override the assert method
  Assertion.prototype.assert = function (expr, msg, negateMsg, expected, _actual, showDiff) {
    // Call the original assert method
    originalAssert.apply(this, arguments);

    // Check if the assertion failed
    if (!expr) {
      // Customize the error message
      const errorMessage = this.__flags.message || msg;
      const customMessage = errorMessage.split(':')[0]; // Extract the custom message
      const newErrorMessage = `Custom Error: ${customMessage}`;

      // Create a new error with the modified message
      const error = new chai.AssertionError(newErrorMessage, { actual: _actual, expected: expected, showDiff: showDiff }, utils.flag(this, 'ssfi'));

      // Set the stack trace to point to the original assertion location
      error.stack = new Error().stack.replace(/^Error/, 'AssertionError');

      throw error;
    }
  };
}

// Use the custom plugin
chai.use(customErrorMessages);

// Example test case
const expect = chai.expect;

describe('Custom Error Messages', function () {
  it('should customize the error message', function () {
    try {
      expect(false, 'The create application button was not found').to.be.true;
    } catch (err) {
      console.log(err.message); // Custom Error: The create application button was not found
    }
  });
});