no unused expression

[fibo]

I have a test like this

describe('emptyGraph', function () {
  it('is a valid graph', function () {
    validate(emptyGraph).should.be.ok
  })
})

and now standard v9 complains with

Expected an assignment or function call and instead saw an expression

Why it is considered a warning? I don't get it. How it could be rewritten?

[dcousens]

Duplicate of #803, see #690

Specifically, here is the comment that explains what you can do to fix the issue: #690 (comment)

[fibo]

Thank you for the asnwer, it was solved using

 validate(emptyGraph).should.be.True()