You can run tests without directly connecting to an existing nodeos node. Hydra allows you to quickly get started writing unit tests.
Which test environment? Hydra or nodeos+cleos?

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You can run tests without directly connecting to an existing nodeos node. Hydra allows you to quickly get started writing unit tests.
Block.one今天宣布,它已经向Klevoya提供了5万美元的资助,以进一步开发其智能合约验证系统,并促进区块链技术的采用。
Block.one announced that it has awarded Klevoya with a $50k grant to further develop it's smart contract verification system
Hydra是一个简单快速的EOSIO智能合约测试和执行环境,可以让您快速创建和执行测试用例,而无需维护和运行本地区块链。
Introducing Hydra: a simple and fast EOSIO smart contract test and execution environment that allows you quickly create and execute test cases without needing to maintain and run a local blockchain.