def test_generate_custom_genesis_parameters(self):
# Establish parameter overrides, for example a custom genesis gas limit
param_overrides = {"gas_limit": 4750000}
# Test the underlying default parameter merging functionality
genesis_params = get_default_genesis_params(overrides=param_overrides)
assert genesis_params["gas_limit"] == param_overrides["gas_limit"]
# Use the the staticmethod to generate custom genesis parameters
genesis_params = PyEVMBackend.generate_genesis_params(param_overrides)
assert genesis_params["gas_limit"] == param_overrides["gas_limit"]
# Only existing default genesis parameter keys can be overridden
invalid_overrides = {"gato": "con botas"}
with pytest.raises(ValueError):
_invalid_genesis_params = PyEVMBackend.generate_genesis_params(
overrides=invalid_overrides)
def test_override_genesis_parameters(self):
# Establish a custom gas limit
param_overrides = {"gas_limit": 4750000}
block_one_gas_limit = param_overrides['gas_limit']
# Initialize PyEVM backend with custom genesis parameters
genesis_params = PyEVMBackend.generate_genesis_params(
overrides=param_overrides)
pyevm_backend = PyEVMBackend(genesis_parameters=genesis_params)
genesis_block = pyevm_backend.get_block_by_number(0)
assert genesis_block["gas_limit"] == param_overrides["gas_limit"]
genesis_block = pyevm_backend.get_block_by_number(1)
assert genesis_block["gas_limit"] == block_one_gas_limit
# Integrate with EthereumTester
tester = EthereumTester(backend=pyevm_backend)
genesis_block = tester.get_block_by_number(0)
assert genesis_block["gas_limit"] == param_overrides["gas_limit"]
genesis_block = tester.get_block_by_number(1)
assert genesis_block["gas_limit"] == block_one_gas_limit
