Unit tests execution in Windows reports error

[pboychev-bcom]

Description

Running the unit tests for a project reports an error in Windows even if there is no such thrown.
The error indicates the process triggered for running the unit tests has exited with an error exit code.

Steps to Reproduce

1. Create a TypeScript module / project.
2. Write unit tests for the project.
3. Run the unit tests / build the project.

Preconditions:
The build / unit tests execution should be triggered under Windows.

Expected behavior:
The tests are passing successfully.

Actual behavior:
The tools are reporting an error like the following:

Error occurred in unit tests execution: null

Reproduces how often:
Every time.

Component/s:
vrotest

Affects Build/s:
3.0.0, 3.1.0, 3.1.1

Client

Rabobank

Proposed changes

We should check if the spawned process exists with exit code 0 (number) or "True" (string) to support both Unix and Windows based workstations.