InjectRepository fails when running test

[osmanmesutozcan]

I'm submitting a...

[ ] Regression 
[x] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

@InjectRepository fails with 'TypeError: Right-hand side of 'instanceof' is not an object'. when yarn test

Expected behavior

Minimal reproduction of the problem with instructions

https://github.com/osmanmesutozcan/nestjs-inject-repository-bug-repro

to run it:

yarn
yarn test

What is the motivation / use case for changing the behavior?

Environment

Nest version: 
    "@nestjs/common": "^5.4.0",
    "@nestjs/core": "^5.4.0",
    "@nestjs/graphql": "^5.5.7",
    "@nestjs/typeorm": "^5.3.0",

 
For Tooling issues:
- Node version: 10.12.0  
- Platform: Linux  

Others:

[kamilmysliwiec]

Please, provide a minimal repository which reproduces your issue.

[osmanmesutozcan]

Hey @kamilmysliwiec. I actually did add an example repository. Let me know if it needs some more clarification.

yarn test should pop an error message

[rcanessa89]

Looks more like a Jest configuration problem

[kamilmysliwiec]

Sounds like you were passing undefined to @InjectRepository. I added an additional check in 6.1.0

[angel-carvajal]

Would you guys give more detail of this? I'm having this problem. How do we fix that?

[wm4tos]

Same problem here... Some solution?

[kamilmysliwiec]

I would suggest avoiding barrel files (index.ts). This may cause some side-effects, leading to classes being represented as undefined. It's especially important when it comes to jest and it's path resolution mapper.