docs tests: add testing documentation.

Author: jitendra-ky

docs/testing/README.md

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+# Testing Documentation
+
+This codebase is setup with a **high standard testing**.
+Which automate the testing of almost complte codebase.
+
+Here we explain how we put different testing in our codebase.
+
+Wishing you Happy Reading :) from @jitendra-ky
+
+## Django API Endpoint Tests
+
+### Overview
+
+Django API endpoint tests are used to test individual API endpoints of the application to ensure they work as expected.
+
+### Running Django API Endpoint Tests
+
+To run the Django API endpoint tests, use the following command:
+
+```bash
+python manage.py test
+```
+
+### Test Framework
+
+We use Django's built-in test framework for testing API endpoints.
+
+## UI Tests
+
+### Overview
+
+UI tests are used to test the user interface of the application using Selenium.
+
+> With `selenium` i automate almost complete UI (User Interface).
+> So no more headache or visiting every page and checking, if it is woring corrently or not after making every small change.
+
+### Running UI Tests
+
+To run the UI tests:
+
+> make sure django server is running on localhost:8000.
+> you can run the server with `python manag.epy runserver`
+
+```bash
+./tools/uitest
+```
+
+### Test Framework
+
+We use Selenium for UI testing.
+
+Selenium is a powerful tool for **controlling a web browser through the program**. It is functional for all browsers, works on all major OS, and its scripts can be written in various programming languages such as **Python**, Java, C#, etc. Selenium is primarily used for **automating web applications for testing purposes** but is certainly not limited to just that. Boring web-based administration tasks can also be automated as well.
+
+## Linting
+
+### Overview
+
+Linting is used to ensure code quality and adherence to coding standards.
+
+### Running Linting
+
+To run the linting checks for python code, use the following command:
+
+```bash
+ruff check --force-exclude $(git ls-files '*.py')
+```
+
+To run ESLint and Prettier check.
+
+```bash
+npm run test
+```
+
+### Tools
+
+- Ruff for linting Python code.
+- ESLint for linting JavaScript code.
+- Prettier for code formattng.
+
+## CI/CD Pipeline
+
+### Overview
+
+With Github Actions We automation to run all the tests on every pull request.
+
+### Pipeline Configuration
+
+The pipeline is configured using GitHub Actions. The configuration file is located at `.github/workflows/tests_ci.yml`.