TS error on a specific class mock

[C0ZEN]

Subject of the issue

When using createMock on a specific complex class, an error occurred breaking all the tests.

Your environment

• ts-auto-mock version: 1.5.7
• typescript version: 3.8.3
• node version: 13.5.0
• npm version: 6.14.2
• ttypescript: 1.5.10
• jest-ts-auto-mock: 1.0.11
• jest: 25.2.4
• discord.js: 12.1.1

Steps to reproduce

import { Message } from 'discord.js';

createMock<Message>();

You can also checkout the online version of the problem but note that the tests are not working with the dependencies so this is only to have a look of the dependencies and the test not working.

StackTrace

TypeError: Cannot read property 'declarations' of undefined

at r (node_modules/ts-auto-mock/transformer/index.js:176:21)
at Object.t [as GetDeclarationFromNode] (node_modules/ts-auto-mock/transformer/index.js:172:16)
at node_modules/ts-auto-mock/transformer/index.js:550:38
at Array.forEach (<anonymous>)
at node_modules/ts-auto-mock/transformer/index.js:549:17
at Array.forEach (<anonymous>)
at p (node_modules/ts-auto-mock/transformer/index.js:548:46)
at l (node_modules/ts-auto-mock/transformer/index.js:542:41)
at Object.t.CreateMockFactory (node_modules/ts-auto-mock/transformer/index.js:561:59)
at Object.t.GetTypeReferenceDescriptor (node_modules/ts-auto-mock/transformer/index.js:960:188)

Expected behavior

No error and a mock produced.

Actual behavior

Error and no mock produced.

Additional information

Could be related to the #201 issue.

[C0ZEN]

<@U010ZUZQPS4> morning!. I confirm that there is an issue mocking Message. The interface it's actually quite complex.
_{View in Slack}

[uittorio]

Hi, good news. I've found the source of the bug.

declare function TestFn(): new (...args: any[]) => Test ;

class Test extends TestFn() {
  public a: string;
}

We don`t currently support extending function constructor.

I've found a fix, just need to add more tests to make sure we are covering all the scenarios.

[uittorio]

I've created a branch. Once it's reviewed and merge, a new version will be published :). #296

[uittorio]

This is fixed in 1.6.0 :) I'll close for now. Feel free to reopen it if it's still bugged.

[C0ZEN]

@uittorio I refactored all the Discord classes with createMock and for all the cases this new version is fine.
Thank you for the time and the fix, this is very nice.

[uittorio]

Cool! bear in mind that some types are not working in discord.. it will convert to null :) hopefully it will not impact your code