Some tests fails to open .txt files.

[ufrshubham]

Describe the bug
Directory structure generated by MSVC compiler is a little different. This causes all the tests using txt files to fail, because they don't find the required input *.txt files. It seems cmake files will have to be modified to copy all the txt files to correct location depending on current platform.

To Reproduce
Steps to reproduce the behavior:

1. Clone this repo on a Windows machine.
2. Build it with cmake and MSVC compiler.
3. Run tests.
4. Some tests fail to open *.txt file.

Expected behavior
Tests should pass.

Desktop:

• OS: Windows 10

Additional context
if(WIN32) can be used.