anya-core 1.2.0

# Unit Testing

This document details the unit testing practices in Anya.

## Test Structure

### 1. Test Organization
```rust
#[cfg(test)]
mod tests {
    use super::*;

    // Test setup
    fn setup() -> TestContext {
        TestContext::new()
    }

    // Test cleanup
    fn teardown(context: TestContext) {
        context.cleanup();
    }

    #[test]
    fn test_basic_functionality() {
        let context = setup();
        // Test implementation
        teardown(context);
    }
}
```

### 2. Test Categories
```rust
#[cfg(test)]
mod tests {
    // Positive tests
    #[test]
    fn test_valid_input() {
        assert!(process_input("valid").is_ok());
    }

    // Negative tests
    #[test]
    fn test_invalid_input() {
        assert!(process_input("").is_err());
    }

    // Edge cases
    #[test]
    fn test_boundary_conditions() {
        assert!(process_input("max_length").is_ok());
    }
}
```

### 3. Test Utilities
```rust
// Test helpers
pub mod test_utils {
    pub fn create_test_data() -> TestData {
        TestData::default()
    }

    pub fn verify_result(result: TestResult) -> bool {
        result.is_valid()
    }

    pub fn cleanup_test_data(data: TestData) {
        data.cleanup();
    }
}
```

## Test Implementation

### 1. Basic Tests
```rust
#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_addition() {
        assert_eq!(add(2, 2), 4);
    }

    #[test]
    fn test_subtraction() {
        assert_eq!(subtract(4, 2), 2);
    }

    #[test]
    fn test_multiplication() {
        assert_eq!(multiply(3, 3), 9);
    }
}
```

### 2. Property Tests
```rust
use proptest::prelude::*;

proptest! {
    #[test]
    fn test_addition_properties(a in 0..100i32, b in 0..100i32) {
        let result = add(a, b);
        prop_assert!(result >= a);
        prop_assert!(result >= b);
        prop_assert_eq!(result, b + a);
    }
}
```

### 3. Mock Tests
```rust
use mockall::automock;

#[automock]
trait Database {
    fn query(&self, id: u32) -> Result<String, Error>;
}

#[cfg(test)]
mod tests {
    #[test]
    fn test_database_query() {
        let mut mock = MockDatabase::new();
        mock.expect_query()
            .with(eq(1))
            .returning(|_| Ok("result".to_string()));
        
        assert_eq!(mock.query(1).unwrap(), "result");
    }
}
```

## Best Practices

### 1. Test Design
- Single responsibility
- Clear naming
- Comprehensive coverage
- Independent tests

### 2. Test Implementation
- Setup and teardown
- Error handling
- Resource cleanup
- Documentation

### 3. Test Maintenance
- Regular updates
- Coverage monitoring
- Performance checks
- Documentation updates

## Related Documentation
- [Integration Testing](integration-testing.md)
- [Performance Testing](performance-testing.md)
- [Test Coverage](test-coverage.md)