BDD Syntax Error

1

I’m using Chai.js. I have the following assertion

it('Expects subjects in the response body', () => {
    expect(response.body).to.be.an('object').that.includes.key("subjects");
    expect(response.body.subjects).to.be.an('array').that.has.lengthOf.at.least(1);
});

This doesn’t pass I get an error message saying Cannot read property 'least' of undefined

But the following works fine.

it('Expects subjects in the response body', () => {
    expect(response.body).to.be.an('object').that.includes.key("subjects");
    expect(response.body.subjects).to.be.an('array').that.has.lengthOf(10);
});

So how am I using .at.least() incorrectly?

2

The method you want is isAtLeast()

http://chaijs.com/api/assert/#method_isatleast

3

That doesn’t work either. According to the docs (http://chaijs.com/api/bdd/#method_lengthof) it looks like it should work.

4

Sure enough, I was looking at the assert docs and not the expect/should. Sorry about that.

I copied your code into a local project and ran it using Mocha. It worked fine for me. What version of Chai are you using? Do you have other tests that run?

5

The problem ended up being the version of Chai.js I was using. Upgraded and it worked fine.