Creation of production build is compiling files in __mocks__ folders

[MKMZ]

Is this a bug report?

Yes

Did you try recovering your dependencies?

Yes

Environment

Environment Info:

System:
OS: Windows 10
CPU: x64 Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz
Binaries:
npm: 6.4.1 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: 42.17134.1.0
Internet Explorer: 11.0.17134.1
npmPackages:
react: ^16.7.0 => 16.7.0
react-dom: ^16.7.0 => 16.7.0
react-scripts: 2.1.3 => 2.1.3
npmGlobalPackages:
create-react-app: Not Found

Steps to Reproduce

I noticed that react-scripts build command is compiling files from __mocks__ folder (where manual mocks are stored to be used by jest). I have imported "devDepencency" to one .ts file in such folder and building process has failed.

(Write your steps here:)

1. Create project with __mocks__ folder.
2. Add "devDependency" to file in __mocks__ folder.
3. Try to build the solution.

Expected Behavior

Solution has compiled successfully.

Actual Behavior

Compilation has failed, because cannot find dependency in mock file.

[mrmckeb]

Hi @MKMZ, this is very strange and should not be the case. Can you share an example project?