# Test Coverage The tables below provide a summary and detailed information in relation to the number of tests performed, the count of passing tests and the count of failing tests. To summarise, VeChain is fully compatible with OpenZeppelin contracts (with v5 being the latest version tested), and the main differences encountered are related to Hardhat: * The `chainId` in VeChain is the genesis block ID of each network * Custom [Hardhat RPC methods](https://hardhat.org/hardhat-network/docs/reference#special-testing/debugging-methods) like `evm_increaseTime` or `evm_mine` depend on the actual Hardhat VeChain plugin (so differences might be expected in this regard). You can find detailed analysis of the coverage categories in the pages to follow. ## OpenZeppelin v5 ### Summary

Category	Short Description	Failures
Set base URI	URI was not set in the ERC721 and ERC721Enumerable test cases, causing 6 tests to remain pending. Since these tests focus on compatibility, URI validation is not essential.	0

### Detail

Contract Name	Pass	Total
Total	2611	2617
AccessControl	30	30
Ownable	8	8
Ownable2Step	6	6
AccessControlDefaultAdminRules	56	56
AccessControlEnumerable	36	36
AccessManaged	8	8
AccessManager	113	113
AuthorityUtils	4	4
VestingWallet	2	2
Governor	136	136
GovernorERC721	2	2
GovernorPreventLateQuorum	5	5
GovernorStorage	3	3
GovernorTimelockAccess	3	3
GovernorTimelockCompound	8	8
GovernorTimelockControl	12	12
GovernorVotesQuorumFraction	4	4
GovernorWithParams	7	7
Votes	44	44
ERC2771Context	11	11
ERC2771Forwarder	36	36
Clones	30	30
ERC1967Proxy	19	19
BeaconProxy	6	6
UpgradeableBeacon	6	6
ProxyAdmin	5	5
TransparentUpgradeableProxy	19	19
Initializable	29	29
UUPSupgradeable	8	8
ERC721	375	378
ERC721Enumerable	397	400
ERC721Wrapper	18	18
ERC721Holder	1	1
ERC721Burnable	5	5
ERC721Consecutive	34	34
ERC721Pausable	9	9
ERC721Royalty	16	16
ERC721URIStorage	17	17
ERC721Votes	23	23
ERC721Holder	1	1
ERC1155	89	89
ERC1155Burnable	6	6
ERC1155Pausable	11	11
ERC1155Supply	4	4
ERC1155URIStorage	4	4
ERC1155Holder	7	7
Address	7	7
Address	29	29
Arrays	20	20
Base64	5	5
Context	4	4
Create2	8	8
Multicall	4	4
Nonces	6	6
Pausable	11	11
ReentrancyGuard	6	6
ShortStrings	14	14
StorageSlot	24	24
Strings	71	71
ECDSA	14	14
EIP712	13	13
MerkleProof	10	10
MessageHashUtils	4	4
ERC165	5	5
ERC165Checker	40	40
Math	44	44
SafeCast	444	444
SignedMath	12	12
BitMap	10	10
Checkpoints	33	33
DoubleEndedQueue	9	9
EnumerableMap	60	60
EnumerableSet	24	24
Time	7	7

## OpenZeppelin v4 ### Summary

Category	Short Description	Failures
Justifiable	Failures that result from the inherent design differences between VeChain and Ethereum.	73
Contract Address Prediction	See here.	14
Failures in Constructor	Contract fails in constructor, resulting in failure to be deployed.	7
Full, with eth_sign implementation	See here.	4
Full, with test changes	Some test modifications had to be added for the tests to pass.	3
BadBeaconProxy Address 0x1	See here.	1

### Detail

Contract Name	Pass	Fail	Total	Hardhat Total Tests
Total	2324	102	2426	2667
ERC1967Proxy	25	3	28	28
TransparentUpgradeableProxy	58	3	61	61
BeaconProxy	7	2	9	9
GovernorTimelockCompound	7	12	19	19
GovernorCompatibilityBravo	7	2	9	9
TimelockController	27	15	42	48
CrossChainEnabled	4	9	13	15
GovernorTimelockControl	12	9	21	21
AccessControl	50	4	54	80
MinimalForwarder	12	4	16	15
TokenTimelock	3	4	7	7
VestingWallet	2	4	6	6
ERC721Enumerable	233	3	236	236
DoubleEndedQueue	7	2	9	9
ERC2771Context	5	2	7	7
ERC721	211	2	213	213
Governor	42	2	44	44
Checkpoints	22	1	23	23
ERC1155	83	1	84	84
ERC1155Holder	4	1	5	5
ERC1155PresetMinterPauser	16	1	17	17
ERC165	2	1	3	3
ERC165Storage	4	1	5	5
ERC20Votes	28	1	29	29
ERC20VotesComp	27	1	28	28
ERC721PresetMinterPauserAutoId	15	1	16	16
ERC721Royalty	13	1	14	14
GovernorWithParams	3	1	4	4
MerkleProof	8	1	9	9
TimersTimestamp	4	1	5	5
ECDSA	14	3	17	17
SignatureChecker (ERC1271)	1	1	1	7
ERC1820Implementer	1	1	1	6
ERC777	1	1	1	193
ERC777PresetFixedSupply	1	1	1	6
Address	29	0	29	29
Arrays	15	0	15	15
BitMap	10	0	10	10
Clones	30	0	30	30
ConditionalEscrow	11	0	11	11
Context	4	0	4	4
Counters	8	0	8	8
Create2	8	0	8	8
EIP712	2	0	2	2
EnumerableMap	70	0	70	70
EnumerableSet	20	0	24	24
ERC1155Burnable	6	0	6	6
ERC1155Pausable	11	0	11	11
ERC1155Supply	10	0	10	10
ERC1155URIStorage	4	0	4	4
ERC165Checker	40	0	40	40
ERC20	118	0	118	118
ERC20Burnable	13	0	13	13
ERC20Capped	5	0	5	5
ERC20FlashMint	12	0	12	12
ERC20Pausable	12	0	12	12
ERC20Permit	6	0	6	6
ERC20PresetFixedSupply	4	0	4	4
ERC20PresetMinterPauser	12	0	12	12
ERC20Snapshot	14	0	14	14
ERC4626	25	0	25	25
ERC721Burnable	4	0	4	4
ERC721Consecutive	13	0	13	13
ERC721Holder	1	0	1	1
ERC721Pausable	10	0	10	10
ERC721URIStorage	10	0	10	10
ERC721Votes	26	0	26	26
Escrow	10	0	10	10
GovernorComp	2	0	2	2
GovernorERC721Mock	2	0	2	2
GovernorPreventLateQuorum	5	0	5	5
GovernorVotesQuorumFraction	6	0	6	6
Initializable	29	0	29	29
Math	25	0	25	25
MulticallToken	4	0	4	4
Ownable	6	0	6	6
Ownable2Step	5	0	5	5
Pausable	11	0	11	11
PaymentSplitter	20	0	20	20
ProxyAdmin	12	0	12	12
PullPayment	4	0	4	4
ReentrancyGuard	6	0	6	6
RefundEscrow	17	0	17	17
SafeCast	444	0	444	444
SafeERC20	35	0	35	35
SafeMath	48	0	48	48
SignedMath	12	0	12	12
SignedSafeMath	17	0	17	17
StorageSlot	12	0	12	12
Strings	31	0	31	31
TimersBlockNumber	5	0	5	5
UpgradeableBeacon	5	0	5	5
UUPSUpgradeable	6	0	6	6
Votes	23	0	23	23