Test Coverage Guide

Unit tests help everyone dive into the details of the code and understand its functionality.
Through test cases, we can discover bugs and enhance the robustness of the code.
Test cases also serve as demo usage of the code.

Steps, granularity, and combination conditions should be carefully designed.
Pay attention to boundary conditions.
Unit tests should also be well-designed; do not write useless code.
When you find a method difficult to unit test, if it can be confirmed that this method is smelly code, then refactor it together with the developer.
The mock framework used in Dubbo is: mockito. Below are some developer guides: mockito tutorial, mockito refcard
TDD (optional): When you start writing a new feature, you can try to write the test cases first.

At this stage, the test coverage threshold for Delta changes is: >=60%, the higher the better.
We can see the test report on this page: https://codecov.io/gh/apache/dubbo

Feedback