How to write a good test case?

Table of content

How to write test cases: A step-by-step guide

Test cases are the blueprints that testers will follow, so they must be clear, thorough, and accurate. Below, we’ve outlined 10 steps you can take whether you’re writing new test cases or revisiting and evaluating existing test cases.

  1. Define the area you want to cover from the test scenario.
  2. Ensure the test case is easy for testers to understand and execute.
  3. Understand and apply relevant test designs.
  4. Use a unique test case ID.
  5. Use the requirements traceability matrix in testing for visibility.
  6. Include a clear description in each test.
  7. Add proper preconditions and postconditions.
  8. Specify the exact expected result. 
  9. Utilize suitable testing techniques. 
  10. Get your test plan peer-reviewed before moving forward.

What is a “Test Case”?

A Test Case is a specific set of conditions or variables under which a tester will determine whether an application, software system, or one of its features is working correctly or not. A Test Case aims to validate software features’ accuracy, completeness, and reliability. A test case usually includes the following details:

  • Test Case ID.
  • Test Case Description.
  • Module [Optional].
  • Use Case ID or User Story ID [Optional].
  • Pre-Condition.
  • Test Steps.
  • Test Data.
  • Expected Results.
  • Post-Conditions.
  • Actual Results.
  • Status (Passed or Failed).

Benefits of writing high-quality test cases

Writing test cases allows you think through every aspect of your software and makes it easier to identify any software gaps as it develops. Several of benefits emerge when you write formal test cases.

  • Documentation means you can guarantee the coverage of your tests.
  • You can reduce software maintenance and bug fixes and support future costs. 
  • Test cases can be used again in current and future projects.
  • You can improve the quality of the software and the user experience.
  • A higher quality product means more satisfied customers and higher profits.

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