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// #[cfg(test)]
// mod hash_tests {
// use light_compressed_account::Pubkey;
// use light_token_interface::state::{BaseMint, Mint, MintMetadata};
// use rand::Rng;
// /// Hash Collision Detection Tests
// /// Tests for Mint::hash() following hash_collision_testing_guide.md:
// ///
// /// 1. test_hash_basic_functionality - Basic functionality and determinism
// /// 2. test_hash_collision_detection - Systematic field-by-field collision testing
// /// 3. test_hash_zero_value_edge_cases - Edge cases with zero/minimal values
// /// 4. test_hash_boundary_values - Boundary value testing for numeric fields
// /// 5. test_hash_authority_combinations - Authority confusion prevention
// /// 6. test_hash_randomized_1k_iterations - Randomized testing with 1k iterations
// /// 7. test_hash_some_zero_vs_none - Some(zero) vs None semantic distinction
// ///
// /// Helper function for collision detection - reuse existing pattern from token_data.rs
// fn assert_to_previous_hashes(hash: [u8; 32], previous_hashes: &mut Vec<[u8; 32]>) {
// for previous_hash in previous_hashes.iter() {
// assert_ne!(hash, *previous_hash, "Hash collision detected!");
// }
// previous_hashes.push(hash);
// }
// #[test]
// fn test_hash_basic_functionality() {
// let mint = Mint {
// base: BaseMint {
// mint_authority: Some(Pubkey::new_unique()),
// supply: 1000000,
// decimals: 6,
// is_initialized: true,
// freeze_authority: Some(Pubkey::new_unique()),
// },
// metadata: MintMetadata {
// version: 3,
// mint: Pubkey::new_unique(),
// mint_decompressed: false,
// },
// extensions: None,
// };
// // Test basic functionality
// let hash_result = mint.hash().unwrap();
// assert_eq!(hash_result.len(), 32);
// assert_ne!(hash_result, [0u8; 32]); // Not empty hash
// // Test determinism - same input produces same hash
// let hash_result2 = mint.hash().unwrap();
// assert_eq!(hash_result, hash_result2);
// // Test version validation - only version 3 supported
// let mut invalid_mint = mint.clone();
// invalid_mint.metadata.version = 0;
// assert!(invalid_mint.hash().is_err());
// invalid_mint.metadata.version = 1;
// assert!(invalid_mint.hash().is_err());
// invalid_mint.metadata.version = 2;
// assert!(invalid_mint.hash().is_err());
// invalid_mint.metadata.version = 4;
// assert!(invalid_mint.hash().is_err());
// }
// #[test]
// fn test_hash_collision_detection() {
// let mut previous_hashes = Vec::new();
// // Base configuration - choose default state for each field
// let base = Mint {
// base: BaseMint {
// mint_authority: None,
// supply: 0,
// decimals: 0,
// is_initialized: true,
// freeze_authority: None,
// },
// metadata: MintMetadata {
// version: 3,
// mint: Pubkey::new_from_array([1u8; 32]),
// mint_decompressed: false,
// },
// extensions: None,
// };
// assert_to_previous_hashes(base.hash().unwrap(), &mut previous_hashes);
// // Test different mint values
// for i in 2u8..10u8 {
// let mut variant = base.clone();
// variant.metadata.mint = Pubkey::new_from_array([i; 32]);
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// // Test different supply values
// for supply in [1, 42, 1000, u64::MAX] {
// let mut variant = base.clone();
// variant.base.supply = supply;
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// // Test different decimals values
// for decimals in [1, 6, 9, 18, u8::MAX] {
// let mut variant = base.clone();
// variant.base.decimals = decimals;
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// // Test mint_decompressed boolean states
// let mut variant = base.clone();
// variant.metadata.mint_decompressed = true; // Flip from false
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// // Test mint_authority Option states
// let mut variant = base.clone();
// variant.base.mint_authority = Some(Pubkey::new_from_array([10u8; 32]));
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// // Test freeze_authority Option states
// let mut variant = base.clone();
// variant.base.freeze_authority = Some(Pubkey::new_from_array([11u8; 32]));
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// // Test extensions Option states
// let mut variant = base.clone();
// variant.extensions = Some(vec![]); // Empty vec vs None
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// // Test multiple fields changed simultaneously
// let mut variant = base.clone();
// variant.base.supply = 5000;
// variant.base.decimals = 9;
// variant.metadata.mint_decompressed = true;
// variant.base.mint_authority = Some(Pubkey::new_from_array([12u8; 32]));
// variant.base.freeze_authority = Some(Pubkey::new_from_array([13u8; 32]));
// variant.extensions = Some(vec![]);
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// #[test]
// fn test_hash_zero_value_edge_cases() {
// let mut previous_hashes = Vec::new();
// // All fields zero/None/false (minimal state)
// let all_minimal = Mint {
// base: BaseMint {
// mint_authority: None,
// supply: 0,
// decimals: 0,
// is_initialized: true,
// freeze_authority: None,
// },
// metadata: MintMetadata {
// version: 3,
// mint: Pubkey::new_from_array([0u8; 32]),
// mint_decompressed: false,
// },
// extensions: None,
// };
// assert_to_previous_hashes(all_minimal.hash().unwrap(), &mut previous_hashes);
// // Test each field individually set to non-zero while others remain minimal
// let mut variant = all_minimal.clone();
// variant.metadata.mint = Pubkey::new_from_array([1u8; 32]); // Only this field non-zero
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// variant = all_minimal.clone();
// variant.base.supply = 1; // Only this field non-zero
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// variant = all_minimal.clone();
// variant.base.decimals = 1; // Only this field non-zero
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// variant = all_minimal.clone();
// variant.metadata.mint_decompressed = true; // Only this field non-false
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// variant = all_minimal.clone();
// variant.base.mint_authority = Some(Pubkey::new_from_array([1u8; 32])); // Only this field non-None
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// variant = all_minimal.clone();
// variant.base.freeze_authority = Some(Pubkey::new_from_array([2u8; 32])); // Only this field non-None
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// variant = all_minimal.clone();
// variant.extensions = Some(vec![]); // Only this field non-None
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// #[test]
// fn test_hash_boundary_values() {
// let mut previous_hashes = Vec::new();
// let base = Mint {
// base: BaseMint {
// mint_authority: Some(Pubkey::new_from_array([2u8; 32])),
// supply: 100,
// decimals: 6,
// is_initialized: true,
// freeze_authority: Some(Pubkey::new_from_array([3u8; 32])),
// },
// metadata: MintMetadata {
// version: 3,
// mint: Pubkey::new_from_array([1u8; 32]),
// mint_decompressed: false,
// },
// extensions: None,
// };
// assert_to_previous_hashes(base.hash().unwrap(), &mut previous_hashes);
// // Test supply boundaries - avoid duplicating base value 100
// for supply in [0, 1, 2, u32::MAX as u64, u64::MAX - 1, u64::MAX] {
// if supply == 100 {
// continue;
// } // Skip base value
// let mut variant = base.clone();
// variant.base.supply = supply;
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// // Test decimals boundaries - avoid duplicating base value 6
// for decimals in [0, 1, 2, 9, 18, u8::MAX - 1, u8::MAX] {
// if decimals == 6 {
// continue;
// } // Skip base value
// let mut variant = base.clone();
// variant.base.decimals = decimals;
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// // Test pubkey boundaries (edge bytes in array) - avoid duplicating base values
// for pubkey_bytes in [[0u8; 32], [4u8; 32], [255u8; 32]] {
// let mut variant = base.clone();
// variant.metadata.mint = Pubkey::new_from_array(pubkey_bytes);
// assert_to_previous_hashes(variant.hash().unwrap(), &mut previous_hashes);
// }
// }
// #[test]
// fn test_hash_authority_combinations() {
// let mut previous_hashes = Vec::new();
// let same_pubkey = Pubkey::new_from_array([42u8; 32]);
// let base = Mint {
// base: BaseMint {
// mint_authority: None,
// supply: 1000,
// decimals: 6,
// is_initialized: true,
// freeze_authority: None,
// },
// metadata: MintMetadata {
// version: 3,
// mint: Pubkey::new_from_array([1u8; 32]),
// mint_decompressed: false,
// },
// extensions: None,
// };
// // Test all authority combinations with same pubkey - must produce different hashes
// // Case 1: None mint_authority, None freeze_authority
// let mut variant1 = base.clone();
// variant1.base.mint_authority = None;
// variant1.base.freeze_authority = None;
// let hash1 = variant1.hash().unwrap();
// assert_to_previous_hashes(hash1, &mut previous_hashes);
// // Case 2: Some mint_authority, None freeze_authority (using same pubkey)
// let mut variant2 = base.clone();
// variant2.base.mint_authority = Some(same_pubkey);
// variant2.base.freeze_authority = None;
// let hash2 = variant2.hash().unwrap();
// assert_to_previous_hashes(hash2, &mut previous_hashes);
// // Case 3: None mint_authority, Some freeze_authority (using same pubkey)
// let mut variant3 = base.clone();
// variant3.base.mint_authority = None;
// variant3.base.freeze_authority = Some(same_pubkey);
// let hash3 = variant3.hash().unwrap();
// assert_to_previous_hashes(hash3, &mut previous_hashes);
// // Case 4: Both authorities present (using same pubkey)
// let mut variant4 = base.clone();
// variant4.base.mint_authority = Some(same_pubkey);
// variant4.base.freeze_authority = Some(same_pubkey);
// let hash4 = variant4.hash().unwrap();
// assert_to_previous_hashes(hash4, &mut previous_hashes);
// // Critical security check: all combinations must produce different hashes
// assert_ne!(
// hash1, hash2,
// "CRITICAL: Hash collision between different authority configurations!"
// );
// assert_ne!(
// hash1, hash3,
// "CRITICAL: Hash collision between different authority configurations!"
// );
// assert_ne!(
// hash1, hash4,
// "CRITICAL: Hash collision between different authority configurations!"
// );
// assert_ne!(
// hash2, hash3,
// "CRITICAL: Hash collision between different authority configurations!"
// );
// assert_ne!(
// hash2, hash4,
// "CRITICAL: Hash collision between different authority configurations!"
// );
// assert_ne!(
// hash3, hash4,
// "CRITICAL: Hash collision between different authority configurations!"
// );
// }
// #[test]
// fn test_hash_some_zero_vs_none() {
// let pubkey_zero = Pubkey::new_from_array([0u8; 32]);
// let base = Mint {
// base: BaseMint {
// mint_authority: None,
// supply: 1000,
// decimals: 6,
// is_initialized: true,
// freeze_authority: None,
// },
// metadata: MintMetadata {
// version: 3,
// mint: Pubkey::new_from_array([1u8; 32]),
// mint_decompressed: false,
// },
// extensions: None,
// };
// // Test Some(zero_pubkey) vs None for mint_authority
// let mut variant_none = base.clone();
// variant_none.base.mint_authority = None;
// let hash_none = variant_none.hash().unwrap();
// let mut variant_some_zero = base.clone();
// variant_some_zero.base.mint_authority = Some(pubkey_zero);
// let hash_some_zero = variant_some_zero.hash().unwrap();
// assert_ne!(
// hash_none, hash_some_zero,
// "Some(zero_pubkey) must hash differently from None for mint_authority!"
// );
// // Test Some(zero_pubkey) vs None for freeze_authority
// let mut variant_none_freeze = base.clone();
// variant_none_freeze.base.freeze_authority = None;
// let hash_none_freeze = variant_none_freeze.hash().unwrap();
// let mut variant_some_zero_freeze = base.clone();
// variant_some_zero_freeze.base.freeze_authority = Some(pubkey_zero);
// let hash_some_zero_freeze = variant_some_zero_freeze.hash().unwrap();
// assert_ne!(
// hash_none_freeze, hash_some_zero_freeze,
// "Some(zero_pubkey) must hash differently from None for freeze_authority!"
// );
// // Test Some(empty_vec) vs None for extensions
// let mut variant_none_ext = base.clone();
// variant_none_ext.extensions = None;
// let hash_none_ext = variant_none_ext.hash().unwrap();
// let mut variant_some_empty_ext = base.clone();
// variant_some_empty_ext.extensions = Some(vec![]);
// let hash_some_empty_ext = variant_some_empty_ext.hash().unwrap();
// assert_ne!(
// hash_none_ext, hash_some_empty_ext,
// "Some(empty_vec) must hash differently from None for extensions!"
// );
// }
// #[test]
// fn test_hash_randomized_1k_iterations() {
// // Use thread RNG following existing test patterns
// let mut rng = rand::thread_rng();
// let mut all_hashes = Vec::new();
// for iteration in 0..1000 {
// let mint = Mint {
// base: BaseMint {
// mint_authority: if rng.gen_bool(0.7) {
// Some(Pubkey::new_from_array(rng.gen::<[u8; 32]>()))
// } else {
// None
// },
// supply: rng.gen::<u64>(),
// decimals: rng.gen_range(0..=18), // Realistic decimal range
// is_initialized: true,
// freeze_authority: if rng.gen_bool(0.7) {
// Some(Pubkey::new_from_array(rng.gen::<[u8; 32]>()))
// } else {
// None
// },
// },
// metadata: MintMetadata {
// version: 3, // Always version 3
// mint: Pubkey::new_from_array(rng.gen::<[u8; 32]>()),
// mint_decompressed: rng.gen_bool(0.5),
// },
// extensions: if rng.gen_bool(0.3) {
// Some(vec![]) // Empty extensions for now
// } else {
// None
// },
// };
// let hash_result = mint.hash().unwrap();
// // Basic validation
// assert_eq!(hash_result.len(), 32);
// assert_ne!(hash_result, [0u8; 32]); // Should not be all zeros
// // Test determinism - same mint should produce same hash
// let hash_result2 = mint.hash().unwrap();
// assert_eq!(
// hash_result, hash_result2,
// "Hash function is not deterministic at iteration {}",
// iteration
// );
// // Check for collisions with all previous hashes
// for (prev_iteration, prev_hash) in all_hashes.iter().enumerate() {
// assert_ne!(
// hash_result, *prev_hash,
// "Hash collision detected! Iteration {} collides with iteration {}",
// iteration, prev_iteration
// );
// }
// all_hashes.push(hash_result);
// }
// println!(
// "Successfully tested {} random mint configurations without collisions",
// all_hashes.len()
// );
// }
// }