test: use parallel mode by default

[tamtamchik]

This pull request introduces a parallel execution mode for the HardHat tests suite.

Issues:

• Unfortunately, HardHat's parallel mode does not work with coverage actions atm, so it's not enabled yet.
  • solidity-coverage doesn't work correctly when parallel mode is enabled NomicFoundation/hardhat#4492
  • feature: support hardhat test --parallel flag sc-forks/solidity-coverage#691

[github-actions]

🧪 Test coverage: 27.79%

Code Coverage Summary

Filename                                                       Stmts    Miss  Cover    Missing
-----------------------------------------------------------  -------  ------  -------  -----------------------------------------
contracts/0.4.24/Lido.sol                                        212      18  91.51%   683-722, 814
contracts/0.4.24/StETH.sol                                        72       6  91.67%   294, 356-360
contracts/0.4.24/StETHPermit.sol                                  15       2  86.67%   130-149
contracts/0.4.24/lib/Packed64x4.sol                                5       5  0.00%    26-47
contracts/0.4.24/lib/SigningKeys.sol                              36      36  0.00%    25-177
contracts/0.4.24/lib/StakeLimitUtils.sol                          37       0  100.00%
contracts/0.4.24/nos/NodeOperatorsRegistry.sol                   485     485  0.00%    208-1450
contracts/0.4.24/oracle/LegacyOracle.sol                          72      72  0.00%    114-399
contracts/0.4.24/utils/Pausable.sol                                9       0  100.00%
contracts/0.4.24/utils/Versioned.sol                               5       0  100.00%
contracts/0.6.12/WstETH.sol                                       17      11  35.29%   70-116
contracts/0.8.9/BeaconChainDepositor.sol                          21      19  9.52%    47-88
contracts/0.8.9/Burner.sol                                        71      71  0.00%    140-380
contracts/0.8.9/DepositSecurityModule.sol                        104       0  100.00%
contracts/0.8.9/EIP712StETH.sol                                   16       1  93.75%   75
contracts/0.8.9/LidoExecutionLayerRewardsVault.sol                16      16  0.00%    64-121
contracts/0.8.9/LidoLocator.sol                                   18       0  100.00%
contracts/0.8.9/OracleDaemonConfig.sol                            28      28  0.00%    16-73
contracts/0.8.9/StakingRouter.sol                                303     296  2.31%    157-1318
contracts/0.8.9/WithdrawalQueue.sol                               88      74  15.91%   89-116, 148-370, 384-392, 397, 400-413
contracts/0.8.9/WithdrawalQueueBase.sol                          146       0  100.00%
contracts/0.8.9/WithdrawalQueueERC721.sol                         89      30  66.29%   110-159, 213, 244, 270, 273, 332, 351-392
contracts/0.8.9/WithdrawalVault.sol                               21      21  0.00%    56-123
contracts/0.8.9/lib/Math.sol                                       4       4  0.00%    9-29
contracts/0.8.9/lib/PositiveTokenRebaseLimiter.sol                22      22  0.00%    88-172
contracts/0.8.9/lib/UnstructuredRefStorage.sol                     2       0  100.00%
contracts/0.8.9/lib/UnstructuredStorage.sol                        8       4  50.00%   13-21, 29
contracts/0.8.9/oracle/AccountingOracle.sol                      171     171  0.00%    153-881
contracts/0.8.9/oracle/BaseOracle.sol                             89      89  0.00%    104-410
contracts/0.8.9/oracle/HashConsensus.sol                         263     263  0.00%    249-1094
contracts/0.8.9/oracle/ValidatorsExitBusOracle.sol                91      91  0.00%    96-461
contracts/0.8.9/proxy/OssifiableProxy.sol                         17      16  5.88%    29-87
contracts/0.8.9/sanity_checks/OracleReportSanityChecker.sol      171     171  0.00%    156-791
contracts/0.8.9/utils/PausableUntil.sol                           31       0  100.00%
contracts/0.8.9/utils/Versioned.sol                               11       0  100.00%
contracts/0.8.9/utils/access/AccessControl.sol                    23       0  100.00%
contracts/0.8.9/utils/access/AccessControlEnumerable.sol           9       0  100.00%
contracts/common/lib/ECDSA.sol                                     8       0  100.00%
contracts/common/lib/Math256.sol                                   6       6  0.00%    13-42
contracts/common/lib/MemUtils.sol                                  8       8  0.00%    14-64
contracts/common/lib/MinFirstAllocationStrategy.sol               27      27  0.00%    35-105
contracts/common/lib/SignatureUtils.sol                           10       0  100.00%
TOTAL                                                           2857    2063  27.79%

Diff against master

Filename                                                    Stmts    Miss  Cover
--------------------------------------------------------  -------  ------  -------
contracts/0.4.24/Lido.sol                                       0     -84  +39.62%
contracts/0.4.24/StETH.sol                                      0     -14  +19.45%
contracts/0.8.9/WithdrawalQueueBase.sol                         0    -129  +88.36%
contracts/0.8.9/utils/PausableUntil.sol                         0     -29  +93.55%
contracts/0.8.9/utils/access/AccessControl.sol                  0     -15  +65.22%
contracts/0.8.9/utils/access/AccessControlEnumerable.sol        0      -4  +44.44%
TOTAL                                                           0    -275  +9.62%

Results for commit: 062e26e

Minimum allowed coverage is 0%

♻️ This comment has been updated with latest results