Equivalence Partitioning
Define equivalence classes for input data and automatically generate valid and invalid test cases.
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How to Use
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- 1
Define Parameters and Equivalence Classes
Enter parameter names and add valid/invalid equivalence classes. Set a class name and representative value for each class.
- 2
Generate Test Cases
Click "Generate Test Cases" to automatically create valid class coverage tests and invalid class tests.
- 3
Export Results
Copy or download generated test cases in CSV or Markdown format.
Presets
Parameter Settings
Add valid and invalid equivalence classes for each parameter
Generation
Results
What is Equivalence Partitioning?
Equivalence Partitioning is a test design tool that divides input data domains into equivalence classes and automatically generates efficient test cases following the equivalence partitioning technique from ISTQB and IEEE 829 standards. Define parameters with valid and invalid classes, each with a representative value, and the tool produces two types of test cases: valid class coverage tests (one case covering all valid classes simultaneously) and individual invalid class tests (one case per invalid class with all other parameters set to valid values). This approach minimizes the number of test cases while maximizing defect detection coverage. Export results in CSV or Markdown format for integration with test management tools.
Key Features
- Define valid and invalid equivalence classes to auto-generate test cases
- Generate both valid class coverage tests and individual invalid class tests
- Freely add and remove parameters and classes
- Quick setup with presets
- Export in CSV and Markdown formats
Use Cases
- Designing test cases for a sign-up form that validates email, age, and zip code fields
- Reducing redundant test cases by grouping equivalent inputs into representative classes
- Identifying both valid and invalid partitions for an API parameter to ensure error handling is tested
- Teaching equivalence partitioning to junior QA engineers or developer teams
- Creating a minimal yet thorough test set that satisfies test coverage requirements
- Exporting test cases to import into TestRail, Jira, or a shared test plan spreadsheet
Frequently Asked Questions
What is equivalence partitioning?
Equivalence partitioning is a black-box testing technique that divides input data domains into "equivalence classes" and tests representative values from each class. It assumes values within the same class produce the same behavior, reducing test cases while achieving high coverage.
What is the difference between valid and invalid classes?
Valid classes represent input ranges the system should process normally, while invalid classes represent input ranges the system should handle as errors. Testing both ensures quality for both normal and error scenarios.
How is this different from boundary value analysis?
Equivalence partitioning divides domains into classes and tests representative values, while boundary value analysis focuses on values near boundaries. They complement each other, and combining them enables more effective testing.
How do I use the generated test cases?
Download in CSV format for use in Excel or test management tools, or copy in Markdown format to paste into documentation. Use them as a checklist during test execution.
Why are other parameters set to valid in invalid class tests?
In invalid tests, only one parameter is set to invalid while others remain valid. This isolates which parameter causes the error. Setting multiple parameters to invalid simultaneously makes it difficult to identify the root cause.