A source to determine expected results to compare with the actual result of the software under test. An oracle may be the existing system (for a benchmark), other software, a user manual, or an individual's specialized knowledge, but should not be the code.
International Software Testing Qualifications Board. (2026). test oracle. ISTQB Glossary. Retrieved October 19, 2026, from https://istqb-glossary.page/test-oracle/.
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