Updated and added more tests to test_flow_handler.py

[Sekhar-Kumar-Dash]

Fixes Issue #562

Changes proposed

This pull request adds more tests for flow_handler.py

Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [ ] My change requires changes to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] All new and existing tests passed.
• [x] This PR does not contain plagiarized content.
• [x] The title of my pull request is a short description of the requested changes.

[Sekhar-Kumar-Dash]

Hello @Sekhar-Kumar-Dash I see your code still has the issue of long lines. max line chars should be 78 chars. Can you please configure your IDE to user PEP8 style guide? Thanks for your PR! i will re-review again when you fix all calls to cassert_called_with() with ANY parameter.

hey @AlyaGomaa PYcharm is showing just one PEP8 style error
Are you getting more errors in your IDE? Anyway, I will further shorten the long lines.

[Sekhar-Kumar-Dash]

@AlyaGomaa I have just updated the pull request, and I used asdict as it was throwing an assertion error when using dict. Please check the code.

[AlyaGomaa]

Hello @Sekhar-Kumar-Dash. checkingg

[AlyaGomaa]

Hey @Sekhar-Kumar-Dash thanks for the awesome PR! we appreciate it!