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Python TestRPC for ethereum

Project description

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A rewrite of Piper Merriam’s eth-testrpc using eth-tester

The eth-teste-rpc is a tool for testing any code that needs to make calls to ethereums RPC API. It starts a server to which you can connect your application and run tests accordingly.It is built on top of py-evm.


pip install eth-tester-rpc

To check usage of the command:

$ py-testrpc --help

  -h, --host TEXT
  -p, --port INTEGER
  --help              Show this message and exit.

To start the server:

py-testrpc -p 8888

The above command will start a server at port 8888. The default port is 8545.

To make a connection using

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("http://localhost:8888"))

Developer Setup

If you would like to hack on eth-tester-rpc, please check out the Ethereum Development Tactical Manual for information on how we do:

  • Testing
  • Pull Requests
  • Code Style
  • Documentation

Development Environment Setup

You can set up your dev environment with:

git clone
cd eth-tester-rpc
virtualenv -p python3 venv
. venv/bin/activate
pip install -e .[dev]

Testing Setup

During development, you might like to have tests run on every file save.

Show flake8 errors on file change:

# Test flake8
when-changed -v -s -r -1 eth_tester_rpc/ tests/ -c "clear; flake8 eth_tester_rpc tests && echo 'flake8 success' || echo 'error'"

Run multi-process tests in one command, but without color:

# in the project root:
pytest --numprocesses=4 --looponfail --maxfail=1
# the same thing, succinctly:
pytest -n 4 -f --maxfail=1

Run in one thread, with color and desktop notifications:

cd venv
ptw --onfail "notify-send -t 5000 'Test failure ⚠⚠⚠⚠⚠' 'python 3 test on eth_tester_rpc failed'" ../tests ../eth_tester_rpc

Release setup

For Debian-like systems:

apt install pandoc

To release a new version:

make release bump=$$VERSION_PART_TO_BUMP$$

How to bumpversion

The version format for this repo is {major}.{minor}.{patch} for stable, and {major}.{minor}.{patch}-{stage}.{devnum} for unstable (stage can be alpha or beta).

To issue the next version in line, specify which part to bump, like make release bump=minor or make release bump=devnum.

If you are in a beta version, make release bump=stage will switch to a stable.

To issue an unstable version when the current version is stable, specify the new version explicitly, like make release bump="--new-version 4.0.0-alpha.1 devnum"

Project details

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