Logic & Boundary Generator
Catch the edge cases before they reach production.
Input field requirements such as date ranges, character limits, or dropdown values and get boundary value and equivalence class scenarios to review.
What it does
Input field requirements such as date ranges, character limits, or dropdown values and get boundary value and equivalence class scenarios to review.
Who this is for
Manual testers, test analysts, and QA engineers who need to apply boundary value analysis (BVA) and equivalence partitioning (EP) to form fields, date inputs, numeric ranges, and other constrained inputs.
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How to use Logic & Boundary Generator
- 1Describe your input field — for example, 'Age field, integer, minimum 18, maximum 120'.
- 2Optionally add data type, required/optional status, and any format constraints.
- 3Click Generate — the tool applies BVA and EP to produce a complete test data set.
- 4Review boundary values (at, just below, just above min/max) and equivalence classes.
- 5Use the generated values directly in test cases or parameterised automation tests.
Example output
For 'Password field, 8–64 characters, must contain uppercase, lowercase, and a number', the tool generates: 7 chars (invalid), 8 chars (valid min), 9 chars (valid), 64 chars (valid max), 65 chars (invalid), all lowercase (invalid), no number (invalid), and a valid boundary example — all with expected pass/fail outcomes.
Limitations
- Analyses individual fields in isolation — complex cross-field validation rules need manual analysis.
- Works best for numeric, string-length, and date constraints; business-logic rules such as discount eligibility still need human judgement.
- Does not generate test automation code — use the Prompt Library for Playwright or Jest parameterised test prompts.
Related resources
Related tools
Related prompts
Related guides
Frequently asked questions
What is boundary value analysis?v
Boundary value analysis (BVA) is a test design technique where you test at the exact boundary of an input range and just inside/outside it. For example, if a field accepts 1–100, you test 0, 1, 2, 99, 100, and 101. Defects are disproportionately common at boundaries.
What is equivalence partitioning?v
Equivalence partitioning (EP) divides inputs into groups where all values in the group should behave the same way. You test one value from each group instead of every possible value, reducing test count without losing coverage.
Can I use it for date fields?v
Yes. Describe the date constraint (e.g. 'date of birth, must be in the past, no earlier than 1900-01-01') and the tool generates boundary dates including leap year edge cases.