// Differential testing for cross-runtime WASM validation

impl Default for DifferentialTester {
    fn default() -> Self {
        Self::new()
    }
}

impl DifferentialTester {
    #[must_use]
    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    /// Create a new instance.
    pub fn new() -> Self {
        Self {
            test_cases: Vec::new(),
        }
    }

    /// Generate test cases for differential testing
    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    pub fn generate_test_cases(&mut self, _module: &[u8], count: usize) -> Vec<TestCase> {
        // Generate diverse test inputs
        let mut cases = Vec::new();

        for i in 0..count {
            cases.push(TestCase {
                inputs: vec![i as i32, (i * 2) as i32],
                expected_output: None,
            });
        }

        cases
    }

    /// Run differential testing between runtimes
    #[must_use]
    #[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
    pub fn differential_test(&self, _module: &[u8]) -> DifferentialResult {
        // This would compare execution across wasmtime, wasmer, etc.
        // Simplified for now
        DifferentialResult::Consistent
    }
}
