When it comes to writing effective test cases, it's crucial to ensure that all possible scenarios are covered. Test cases serve as a roadmap to verify that the software meets the desired specifications and functions as intended. Here are some guidelines to create comprehensive and reusable test cases:
Identify Edge Cases: Apart from testing the regular inputs, it's important to consider extreme values, boundary conditions, and unusual inputs. For example, if you're testing a function that calculates an average, include test cases with the lowest and highest possible values.
Test All Valid Input Combinations: It's essential to cover all possible valid input combinations. For instance, if you have a form with multiple fields, test it with various valid input combinations to ensure that all the fields are working correctly together.
Ensure Maximum Code Coverage: Test cases should be designed to cover as much of the code as possible. By executing test cases that touch different parts of the codebase, you increase the chances of finding potential bugs or issues.
Remember, effective test cases save time and effort in the long run by reducing the number of bugs that reach production.