Using Tosca’s TestCase Design for Data-Driven Testing

In software testing, data-driven testing (DDT) is a powerful technique that involves running the same test logic with different sets of input data. This approach enhances test coverage and reduces redundancy. Tricentis Tosca, a leading continuous testing platform, offers a robust feature called TestCase Design (TCD) to simplify and scale data-driven testing. In this blog post, we’ll explore how Tosca’s TestCase Design module streamlines DDT and why it’s a game-changer for efficient test automation.


What is TestCase Design in Tosca?

TestCase Design in Tosca allows testers to separate test logic from test data. Instead of creating multiple test cases for each data variation, TCD enables you to define reusable templates and generate combinations dynamically. This ensures a cleaner, maintainable, and scalable testing structure.


Key Benefits of Using TestCase Design for DDT

  • Centralized Data Management: Maintain test data in a structured and reusable format.
  • Parameterization: Easily inject data into test steps using parameters.
  • Combinatorial Logic: Generate exhaustive test coverage using value combinations and constraints.
  • Dynamic Test Case Generation: Automatically generate test cases from test sheets, reducing manual effort.


How TestCase Design Works in Tosca

Let’s break down the process into simple steps:

1. Create a TestCase Design Class

Start by creating a TestCase Design class that defines the structure of your test data. This includes attributes (data fields) and their possible values.

Example:

Attribute                                           Values

Username                               user1, user2

Password                                pass123, pass456

Role Admin, Viewer

Each combination of values will represent a different test scenario.


2. Define Combinations (Equivalence Classes or All Combinations)

Tosca allows you to create combinations of data using:

  • All Combinations: Generates every possible combination (Cartesian product).
  • Pairwise/Linear Combinations: Reduces the number of tests while maintaining coverage.
  • Constraints: Define rules to exclude invalid or irrelevant combinations.

This helps in optimizing test cases for both efficiency and coverage.


3. Link TestCase Design to Test Template

Once your data structure is ready, link it to a test case template. This is a parameterized version of your test case where each test step refers to the data attributes from the TCD sheet.

For example:

plaintext


Enter <Username> in the username field.

Enter <Password> in the password field.

Select <Role> from the dropdown.

Tosca will replace placeholders like <Username> with actual data from the design class when generating test cases.


4. Generate Test Cases Automatically

After linking the template and data sheet, Tosca can automatically create individual test cases based on the selected combinations. These generated test cases are ready to execute and fully traceable back to the test data source.


5. Maintain and Reuse

When test data changes, you only need to update it in the TestCase Design sheet. All linked test cases can be regenerated without altering the core test logic. This promotes reusability and easier maintenance across releases.


Conclusion

Tosca’s TestCase Design module brings structure and scalability to data-driven testing. By separating test data from logic, it allows QA teams to efficiently generate, manage, and execute tests across different input scenarios. Whether you're testing web, desktop, or API applications, leveraging TCD for DDT results in higher test coverage, lower maintenance, and faster automation development.

In an agile environment where rapid releases are the norm, TestCase Design ensures your test suite remains robust, dynamic, and easy to manage. For any team embracing model-based test automation, mastering Tosca’s TCD is a must-have skill.

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