Add test suite for code

[Israel-Laguan]

Problem

The code don't have a test suite:

templatestringparser/package.json

Line 7 in 29fec42

"test": "echo \"Error: no test specified\" && exit 1"

This make the code feeble and prone to errors.

Proposal

Add a set of test to make sure the code do what is supposed to do. A suggestion is MochaJS but maybe there are better options.

[tunjioye]

Thanks for this suggestion. Test Cases will be written as mentioned.