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test-oracle-generator

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Generates automated test oracles to verify correct software behavior. Creates assertion-based oracles (expected values), property-based oracles (invariants), differential oracles (comparing implementations), and metamorphic oracles (input transformations). Use when you need to generate assertions for test cases, identify invariants that should always hold, compare new vs legacy implementations, create metamorphic test relationships, validate function correctness, or improve test coverage with better verification strategies. Supports Python (pytest, unittest, hypothesis) and Java (JUnit, property testing).

skills/test-oracle-generator/SKILL.md

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# Test Oracle Generator

Generate automated test oracles to verify correct software behavior across multiple oracle types.

## Oracle Types

1. **Assertion-based**: Compare actual vs expected output
2. **Property-based**: Verify invariants that should always hold
3. **Differential**: Compare new implementation against reference
4. **Metamorphic**: Test input-output transformations

## Workflow

### Step 1: Analyze the Function Under Test
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