Implement test on add and delete functionality

[chukwuebukaVictor]

Todo-list test

• Add a unit test on add functionality using jest
• Add a unit test on delete functionality using jest
• Add a unit test on local storage jest

[Hamzaoutdoors]

Hi @chukwuebukaVictor,

Congratulations! 🎉 Project Approved ✅

Your project is complete! There is nothing else to say other than... it's time to merge it 🚀

To Highlight:

• The Pull Request has a proper title and description. ✔️
• You have added a descriptive Readme file. Good Job. ✔️
• There is no linter error is present. ✔️
• Project has met all the technical aspects you needed for this project! ✔️
• 4 unit tests have been passed ✔️

Optional suggestions

Every comment with the [OPTIONAL] prefix is not crucial enough to stop the approval of this PR. However, I strongly recommend you to take them into account as they can make your code better.

You can also consider:

• I recommend you to collect your Unit Test files into a tests folder,

Cheers and Happy coding and Keep rocking! 👏👏👏

Feel free to leave any questions or comments in the PR thread if something is not 100% clear.

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