Sinon unit testing. How to unit test a function that will return a promise that will call another function with callback?

I am new to Sinon, but I have looked around for a while trying to find an answer for this question..

I have a function I need to test, it returns a promise to call another function will callback.. Below is the function that I need to write test case for:

const bookService = require(./bookService);

const getBook = () => {
  const bookName = "book";
  const bookID = '111';
  return new Promise((resolve, reject) => {
    bookService.InfoRequest(bookName, bookID, 'GET', res => {
      if(res.error){
         reject(res);
      }else{
         const list = res['allPages'] || [];
         if(list = []){
           resolve({
             pageNumber: 0,
             note: "book is no longer exist"
           });
         }else{
             resolve(res['allPages']);
         }  
      }
    })
  })
} 

The bookService.InfoRequest method is not returning anything it returns the callback(res);

I have tried stub the bookService.InfoRequest method, but since it is not returning anything I am not sure how can I modified the callback parameter to test all 3 branchs..

I am using Ava, so I tried something like this:

test('getBook Error Block', t=> {
    const stub = sinon.stub(bookService, InfoRequest);
    stub.callsFake(() => {
    return { error: true };
    });
    
    return obj.getBook().then(res => {
    t.deepEqual(res, []);
}).catch(error => {
    console.log(error.error);
    t.deepEqual(error.error, true);
})

})

This is the test cases for the first Branch, the reject(res) branch. There are 2 more very similar only with different callFake.

But the problem is I am not able to print the error out and test shows it passed, but if I change true to false, it also pass...