As specified in the title
I use truffle to test now, but often times it just returns the error msg "invalid opcode" instead of clearly stating what happened.
Any other testing/debugging tips will also be much appreciated ><
Thanks a lot:)


Use the pyethereum tester: https://github.com/ethereum/pyethereum/wiki/Using-pyethereum.tester

This is much faster than using a truffle workflow with testrpc, and much more flexible: You can test the return values of functions, store the blockchain state to do repeated tests on it, change the block timestamp etc.


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