knex/test/unit/interface.js

'use strict';
/*global expect, describe, it*/
var _interface = require("../../lib/interface");
var chai = require("chai");

describe('interface', function () {
  it('catch and rethrow with an async stack trace', function (done) {
    var error = new Error('Some SQL error')
    function SomeClass() {
      this.client = {
        config: {
          asyncStackTraces: true
        },
        runner: function (){
          return {
            run: function () {
              return {
                catch: function (rethrow) {
                  rethrow.call(fakeInstance, error) // by calling here we're simulating that the promise was rejected
                  chai.expect(error.stack).to.equal('Error: Some SQL error\nline1\nline2\nline3')
                  done()
                },
                then: function () {}
              }
            }
          }
        }
      }
    }

    _interface(SomeClass)
    var fakeInstance = new SomeClass()
    fakeInstance._asyncStack = [
      'line1',
      'line2',
      'line3'
    ]
    fakeInstance.then()
  })

})