//! Demonstration of comprehensive test coverage improvements
//! This test suite compiles and runs independently
//!
//! NOTE: Currently disabled - testing APIs that don't exist or have changed

/*
use ruchy::performance_optimizations::{CompilationCache, StringInterner, ParserPool};
use ruchy::error_recovery_enhanced::{ErrorRecoveryContext, RecoveryStrategy};
use ruchy::frontend::ParseError;
use ruchy::frontend::ast::Span;

#[test]
fn test_compilation_cache_functionality() {
    let mut cache = CompilationCache::new(100);

    // Check insertion
    cache.insert(
        "test_key".to_string(),
        "output".to_string(),
        std::time::Duration::from_millis(100),
        1024
    );

    // Check retrieval
    let result = cache.get("test_key");
    assert_eq!(result, Some("output".to_string()));

    // Check cache miss
    let miss = cache.get("missing");
    assert_eq!(miss, None);

    // Check statistics
    let stats = cache.stats();
    assert_eq!(stats.hits, 1);
    assert_eq!(stats.misses, 1);
    assert!(stats.hit_rate() > 0.0);
}

#[test]
fn test_string_interner() {
    let mut interner = StringInterner::new();

    // Check interning
    let id1 = interner.intern("hello");
    let id2 = interner.intern("world");
    let id3 = interner.intern("hello"); // Same string

    assert_eq!(id1, id3); // Same string gets same ID
    assert_ne!(id1, id2); // Different strings get different IDs

    // Check retrieval
    assert_eq!(interner.get(id1), Some("hello"));
    assert_eq!(interner.get(id2), Some("world"));

    // Check size tracking
    assert_eq!(interner.len(), 2); // Only 2 unique strings
}

#[test]
fn test_parser_pool() {
    let pool = ParserPool::new(10);

    // Check pool creation
    assert_eq!(pool.capacity(), 10);
    assert_eq!(pool.size(), 0); // Initially empty

    // Check parser creation
    let _parser = pool.create_parser("let x = 42");

    // Check statistics
    let stats = pool.stats();
    assert_eq!(stats.created, 1);
    assert_eq!(stats.borrowed, 1);
}

#[test]
fn test_error_recovery_manager() {
    use ruchy::error_recovery_enhanced::RecoveryStrategy;
    let mut manager = ErrorRecoveryContext::new(RecoveryStrategy::Adaptive, 10);

    // Check strategy selection
    let strategy = manager.select_strategy(&ParseError {
        message: "Unexpected token".to_string(),
        span: Span::new(0, 5),
        recovery_hint: None,
    });

    // Should select a reasonable strategy
    assert!(matches!(
        strategy,
        RecoveryStrategy::SkipToDelimiter |
        RecoveryStrategy::InsertMissing |
        RecoveryStrategy::ReplaceTokens |
        RecoveryStrategy::Adaptive
    ));

    // Check tracking
    manager.record_recovery_attempt("test_error", &strategy, true);

    let effectiveness = manager.get_strategy_effectiveness(&strategy);
    assert!(effectiveness >= 0.0 && effectiveness <= 1.0);
}

#[test]
fn test_cache_lru_eviction() {
    let mut cache = CompilationCache::new(2);

    // Fill cache to capacity
    cache.insert("key1".to_string(), "value1".to_string(),
                 std::time::Duration::from_millis(10), 100);
    cache.insert("key2".to_string(), "value2".to_string(),
                 std::time::Duration::from_millis(10), 100);

    // Access key1 to make it more recently used
    let _ = cache.get("key1");

    // Insert third item - should evict key2 (LRU)
    cache.insert("key3".to_string(), "value3".to_string(),
                 std::time::Duration::from_millis(10), 100);

    // Check eviction
    assert!(cache.get("key1").is_some()); // Still present
    assert!(cache.get("key2").is_none());  // Evicted
    assert!(cache.get("key3").is_some()); // Newly added

    let stats = cache.stats();
    assert_eq!(stats.evictions, 1);
}

#[test]
fn test_memory_tracking() {
    let mut cache = CompilationCache::new(10);

    // Insert items with different memory sizes
    cache.insert("small".to_string(), "x".to_string(),
                 std::time::Duration::from_millis(5), 100);
    cache.insert("large".to_string(), "y".repeat(1000),
                 std::time::Duration::from_millis(10), 5000);

    // Check memory usage
    let memory = cache.memory_usage();
    assert_eq!(memory, 5100); // 100 + 5000
}

#[test]
fn test_error_recovery_learning() {
    use ruchy::error_recovery_enhanced::RecoveryStrategy;
    let mut manager = ErrorRecoveryContext::new(RecoveryStrategy::Adaptive, 10);

    let error = ParseError {
        message: "Missing semicolon".to_string(),
        span: Span::new(10, 11),
        recovery_hint: Some("Insert semicolon".to_string()),
    };

    // Record multiple attempts
    let strategy = RecoveryStrategy::InsertMissing;
    manager.record_recovery_attempt("missing_semi", &strategy, true);
    manager.record_recovery_attempt("missing_semi", &strategy, true);
    manager.record_recovery_attempt("missing_semi", &strategy, false);

    // Check effectiveness (2 successes, 1 failure = 66.67%)
    let effectiveness = manager.get_strategy_effectiveness(&strategy);
    assert!(effectiveness > 0.6 && effectiveness < 0.7);

    // Strategy should adapt based on success rate
    let selected = manager.select_strategy(&error);
    assert!(matches!(selected, RecoveryStrategy::InsertMissing | RecoveryStrategy::Adaptive));
}

// Property-based tests
#[cfg(test)]
mod property_tests {
    use super::*;
    use proptest::prelude::*;

    proptest! {
        #[test]
        fn test_cache_never_panics(
            key in ".*",
            value in ".*",
            millis in 0u64..10000,
            bytes in 0usize..1000000
        ) {
            let mut cache = CompilationCache::new(10);
            // Should never panic regardless of input
            cache.insert(
                key.clone(),
                value,
                std::time::Duration::from_millis(millis),
                bytes
            );
            let _ = cache.get(&key);
        }

        #[test]
        fn test_interner_consistency(s in ".*") {
            let mut interner = StringInterner::new();
            let id1 = interner.intern(&s);
            let id2 = interner.intern(&s);

            // Same string always gets same ID
            prop_assert_eq!(id1, id2);

            // Can always retrieve interned string
            prop_assert_eq!(interner.get(id1), Some(s.as_str()));
        }

        #[test]
        fn test_cache_size_bounds(capacity in 1usize..100) {
            let cache = CompilationCache::new(capacity);
            assert_eq!(cache.capacity(), capacity);
            assert_eq!(cache.len(), 0);
            assert!(cache.is_empty());
        }
    }
}*/
