GitAuto: [FEATURE] Generate unit tests for this project

Original issue: #149

What is the feature

The feature is to generate unit tests for the project by creating a new test project under the /Tests/ directory named BancosBrasileiros.MergeTool.Tests.csproj. This test project will include necessary NuGet packages for testing.

Why we need the feature

Unit tests are essential for ensuring the reliability and correctness of the code. They help in identifying bugs early in the development process and facilitate easier maintenance and refactoring. By having a dedicated test project, we can systematically test the functionalities of the BancosBrasileiros.MergeTool project.

How to implement and why

Create a new directory:
- Create a /Tests/ directory if it doesn't already exist. This will serve as the location for all test-related projects, keeping them organized and separate from the main codebase.
Create a new test project:
- Inside the /Tests/ directory, create a new C# project named BancosBrasileiros.MergeTool.Tests.csproj. This will be the main project for writing and running unit tests.
Add NuGet packages:
- Add the following NuGet packages to the test project:
  - xUnit: A popular testing framework for .NET, which will be used to write and run the tests.
  - coverlet.msbuild: A cross-platform code coverage tool for .NET, which will help in measuring the effectiveness of the tests.
  - nsubstitute: A friendly substitute for .NET mocking, which will be used to create mock objects for testing.
  - fluentassertions: A set of .NET extension methods that allow for more readable and maintainable assertions in tests.
Configure the test project:
- Ensure that the test project is correctly configured to reference the main BancosBrasileiros.MergeTool project. This will allow the test project to access the classes and methods that need to be tested.
Write initial test cases:
- Start by writing basic test cases for the most critical functionalities of the BancosBrasileiros.MergeTool project. This will serve as a foundation for future tests and help in validating the initial setup.

About backward compatibility

This feature does not affect backward compatibility as it involves adding a new test project without altering the existing codebase. The main project remains unchanged, ensuring that current functionalities are not impacted.

Test these changes locally

git checkout -b gitauto/issue-#149-c39e9ad6-4986-4a9a-8f89-1c90d3fe7385
git pull origin gitauto/issue-#149-c39e9ad6-4986-4a9a-8f89-1c90d3fe7385

guibranco / BancosBrasileiros-MergeTool