Is it possible to add information to the error message in supertest


I’m utilizing supertest with mocha to test a nodejs express app. Everything is fine expect I’d like a little more descriptive error messages. That’s not to say the messages are currently bad, they’re not. I’d just like a little more information.

For example:

it('should successfully post my data and return a valid JSON', function(done) {
  .set('Accept', 'application/json')
  .expect('Content-Type', /json/)
  .expect(201, resultBody)
  .end(function(err, res) {
    if (err) return done(err);

If an error should occur, such that the resultBody doesn’t match the actual result, it’ll print out a nice + expected - actual message. But I would also like to see other information (maybe the authentication or the header).

My current solution is to do the following:

  .end(function(err, res) {
    if (err) {
      return done(err);

But the console.log messages appear inline with the "it" messages, before the passing/pending/failing messages and not with the actual error.

Is it possible, without too much extra effort, to put extra information with the error message?


You can fix it using the Language Chains of Chai in expect and should adding Assertion Styles:

var foo = false;
expect(foo, 'foo must be true');
//AssertionError: foo must be true: expected false to be true

Answered By – emilioriosvz

Answer Checked By – Terry (AngularFixing Volunteer)

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