Test-Drive Development Approach for Agile Software Development

Now, people are often talking about agile development.

What is Agile Development?

Agile development is a software development capability that responds to rapidly changing needs. Their specific names, concepts, processes, and terminology vary. Compared to “non-agile,” they emphasize close collaboration between programmers’ teams and business experts, face-to-face communication (considered more effective than written documentation), and frequently deliver new software releases, small and self-organizing teams for small and valuable features writing, and team organization approaches that adapt to changing needs, with a greater focus on the role of people in software development.

TDD implementation plan

  1. Don’t want to be fat with one bite. When testing large functional blocks, you should first split them into smaller functional blocks for testing;
  2. Remember not to write code to complete the function, use the simplest possible code to implement the function;
  3. If the requirements can be tested, write test code, and give up those that cannot be tested or feel that they do not need to be tested;
  4. Before changing/adding any function code, you must first think about whether you want to change/add test cases;
  5. Function/test code, unreasonable structure, duplicate code, etc., refactor in time after the test passes.
  1. Add a unit test to verify the input and output of the test scenario;
  2. Run the test and get the failed test result;
  3. Write the simplest function code to pass the test;
  4. Run the test again and see that the test passes;
  5. Carry out code refactoring, including functional code and unit test code;
  6. Repeat the above steps until the development is completed.
  1. The protection net. Covering complete unit testing provides a protective net for product code, making it easy to meet changes in requirements or improve code design. So if your project requirements are stable, done at once, and there are no subsequent changes, the benefits of TDD are less.
  2. Clarify requirements in advance. Writing tests first can help us think about the requirements and clarify the details of the requirements in advance, rather than discovering unclear requirements only halfway through the code.
  3. Quick feedback. A lot of people say that when TDD, my code volume increases, so development efficiency decreases. However, if you don’t have unit tests, you have to test them manually, you spend a lot of time preparing data, launching apps, modifying interfaces, and so on, and feedback is slow. To be precise, quick feedback is a benefit of unit testing.

IT professional