td.explain does not work on new instance of td.replace('lib')

[stephan-nordnes-eriksen]

Info:

It appears that td.explain does not seem to work on new instances (context) of replaced libraries.

Current behaviour:

let td = require('testdouble')
let someLibrary = td.replace('bull') ///Whichever library you want. I Had bull installed, so I tested with that
let instance = new someLibrary()
console.log('instance', instance, td.explain(instance), typeof(instance))
console.log(td.explain(someLibrary))

Running this results in;

$ node weirdness.js
instance testDouble {} { name: undefined,
  callCount: 0,
  calls: [],
  description: 'This is not a test double.',
  isTestDouble: false } object
{ name: 'bull: Queue',
  callCount: 1,
  calls: [ { args: [], context: testDouble {} } ],
  description: 'This test double `bull: Queue` has 0 stubbings and 1 invocations.\n\nInvocations:\n  - called with `()`.',
  isTestDouble: true }

Expected behaviour:

I expected something like the following:

$ node weirdness.js
instance testDouble {} { name: `bull: Queue context`,
  callCount: 0,
  calls: [],
  description: 'This test double `bull: Queue context` has 0 stubbings and 0 invocations.',
  isTestDouble: true } object
{ name: 'bull: Queue',
  callCount: 1,
  calls: [ { args: [], context: testDouble {} } ],
  description: 'This test double `bull: Queue` has 0 stubbings and 1 invocations.\n\nInvocations:\n  - called with `()`.',
  isTestDouble: true }

---

testdouble@3.3.2

[searls]

td.explain currently only supports being passed functions themselves, not objects that reference functions.

…

On Jan 17, 2018, at 04:40, Stephan Nordnes Eriksen ***@***.***> wrote: Info: It appears that td.explain does not seem to work on new instances (context) of replaced libraries. Current behaviour: let td = require('testdouble') let someLibrary = td.replace('bull') ///Whichever library you want. I Had bull installed, so I tested with that let instance = new someLibrary() console.log('instance', instance, td.explain(instance), typeof(instance)) console.log(td.explain(someLibrary)) Running this results in; $ node weirdness.js instance testDouble {} { name: undefined, callCount: 0, calls: [], description: 'This is not a test double.', isTestDouble: false } object { name: 'bull: Queue', callCount: 1, calls: [ { args: [], context: testDouble {} } ], description: 'This test double `bull: Queue` has 0 stubbings and 1 invocations.\n\nInvocations:\n - called with `()`.', isTestDouble: true } Expected behaviour: I expected something like the following: $ node weirdness.js instance testDouble {} { name: `bull: Queue context`, callCount: 0, calls: [], description: 'This test double `bull: Queue context` has 0 stubbings and 0 invocations.', isTestDouble: true } object { name: 'bull: Queue', callCount: 1, calls: [ { args: [], context: testDouble {} } ], description: 'This test double `bull: Queue` has 0 stubbings and 1 invocations.\n\nInvocations:\n - called with `()`.', isTestDouble: true } ***@***.*** — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

[searls]

Duplicate of #48