text: from unittest import TestCase
  
  from mythril.ethereum.interface.rpc.client import EthJsonRpc
  
  class RpcTest(TestCase):
      client = None
  
      def setUp(self):
          self.client = EthJsonRpc()
  
      def tearDown(self):
          self.client.close()
  
      def test_eth_coinbase(self):
          coinbase = self.client.eth_coinbase()
          self.assertTrue(coinbase.startswith("0x"), "coinbase should be a hex string")
          self.assertEqual(len(coinbase), 42, "coinbase is a string with length of 42")
  
      def test_eth_blockNumber(self):
          block_number = self.client.eth_blockNumber()
          self.assertGreater(block_number, 0, "we have made sure the blockNumber is > 0 for testing")
  
      def test_eth_getBalance(self):
          balance = self.client.eth_getBalance(address="0x0000000000000000000000000000000000000000")
          self.assertGreater(balance, 10000000, "specified address should have a lot of balance")
  
      def test_eth_getStorageAt(self):
          storage = self.client.eth_getStorageAt(address="0x0000000000000000000000000000000000000000")
          self.assertEqual(storage, '0x0000000000000000000000000000000000000000000000000000000000000000')
  
      def test_eth_getBlockByNumber(self):
          block = self.client.eth_getBlockByNumber(0)
          self.assertEqual(block["extraData"], "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa", "the data of the first block should be right")
  
      def test_eth_getCode(self):
          # TODO: can't find a proper address for getting code
          code = self.client.eth_getCode(address="0x0000000000000000000000000000000000000001")
          self.assertEqual(code, "0x")
  
      def test_eth_getTransactionReceipt(self):
          transaction = self.client.eth_getTransactionReceipt(tx_hash="0xe363505adc6b2996111f8bd774f8653a61d244cc6567b5372c2e781c6c63b737")
          self.assertEqual(transaction["from"], "0x22f2dcff5ad78c3eb6850b5cb951127b659522e6")
          self.assertEqual(transaction["to"], "0x0000000000000000000000000000000000000000")
  