Chai: Array length checking error

[endymion00]

Hi,
I have a test that checks the length of a function result (an array of objects).
Due to an error in my code the objects inside array where created with a field name called 'undefined'.

Sample

let resultArray = [
{ name  : 'a name1',
  surname : 'a surname1' ,
 undefined: {}
},
{ name  : 'a name2',
  surname : 'a surname2' ,
 undefined: {}
}
]

My test expectation was:

expect(resultArray).to.have.lenght(2);

(also tried with expect(resultArray).to.have.lenghtOf(2))

As a result expect always says that the length of the array was 0 despite the array have 2 elements.
As a workaround I had to change the expectation to this:

expect(resultArray.length).to.equal(2);

I'm using chai version 3.5.0

[vieiralucas]

Hello @endymion00, thank you for your issue.

I tried to reproduce your problem with the following code:

const expect = require('chai').expect;

let resultArray = [
  { name  : 'a name1',
    surname : 'a surname1' ,
   undefined: {}
  },
  { name  : 'a name2',
    surname : 'a surname2' ,
   undefined: {}
  }
];

expect(resultArray).to.have.length(2); // does not throw
expect(resultArray).to.have.lenghtOf(2); // does not throw


expect(resultArray).to.have.lenght(3);
// /\ this throws AssertionError: expected [ Array(2) ] to have a length of 3 but got 2

I'm using chai 3.5.0 with node 7.0.0

Can you provide a more detailed example? Maybe a public repo demonstrating the problem.

[meeber]

@endymion00 We haven't been able to reproduce this issue. I'm going to go ahead and close this issue, but please feel welcome to reopen it if you have a standalone example to share that demonstrates the problem.

[moniuch]

came here accidentally from google.
Isn't the typo in length the problem?