Implement Test Framework

[isururanawaka]

• [ ] Enhance the current test bed to the rest of the APIs.
  • [ ] Verify existing test cases
  • [ ] Add new test cases for critical APIs.
• [ ] Implement unit tests for core functionalities
  • [ ] Find a way to simulate Data access layer
  • [ ] Write test cases for entire core services APIs

[abhinav7sinha]

Taking this up