React/Jest tests for ModalWindow.js

[shivaahir158]

Motivate of the pull request

• To address an existing issue. If so, please provide a link to the issue:
• Breaking new feature. If so, please describe details in the description part.

Describe the technical details -

Tests for ModalWindow.js that checks

1. Rendering the modal with the correct title.
2. Verifying that all input fields are rendered with the correct default values.
3. Triggering the closeModal function when the close button is clicked.
4. Triggering the onSubmit function with the correct data when the form is submitted.
5. Making sure that input fields (name, age, percentage, and clock) update correctly when their values are changed.

Which part of the code base require a change

• Frontend: ModalWindow.test.js
• Backend:
• Library: <Specify the library name, e.g. npm packages>
• Plug-in: <Specify the plugin name, e.g. Webpack, jtest>
• Documentation
• Regression tests
• Continuous Integration (CI) scripts

Impact of the pull request

• Require a change on Quality of Results (QoR)
• Break backward-compatibility. If so, please list who may be influenced.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.06%. Comparing base (02be836) to head (44a6726).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #221   +/-   ##
=======================================
  Coverage   68.06%   68.06%           
=======================================
  Files         109      109           
  Lines        8527     8527           
=======================================
  Hits         5804     5804           
  Misses       2723     2723           

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