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Merge pull request #808 from embark-framework/eth_call_coverage

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Add call coverage to pure functions
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Iuri Matias 2018-09-12 18:31:22 -04:00 committed by GitHub
commit cdf5a37ac4
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1 changed files with 36 additions and 1 deletions
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37
lib/tests/test.js
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@ -99,7 +99,42 @@ class Test {
if (!this.sim) {
this.sim = getSimulator();
}
this.web3.setProvider(this.sim.provider(this.simOptions));
let simProvider = this.sim.provider(this.simOptions);
// Here we patch the sendAsync method on the provider. The goal behind this is to force pure/constant/view calls to become
// transactions, so that we can pull in execution traces and account for those executions in code coverage.
//
// Instead of a simple call, here's what happens:
//
// 1) A transaction is sent with the same payload, and a pre-defined gas price;
// 2) We wait for the transaction to be mined by asking for the receipt;
// 3) Once we get the receipt back, we dispatch the real call and pass the original callback;
//
// This will still allow tests to get the return value from the call and run contracts unmodified.
simProvider.realSendAsync = simProvider.sendAsync.bind(simProvider);
simProvider.sendAsync = function(payload, cb) {
if(payload.method !== 'eth_call') {
return simProvider.realSendAsync(payload, cb);
}
let newParams = Object.assign({}, payload.params[0], {gasPrice: '0x77359400'});
let newPayload = {
id: payload.id + 1,
method: 'eth_sendTransaction',
params: [newParams],
jsonrpc: payload.jsonrpc
};
simProvider.realSendAsync(newPayload, (_err, response) => {
let txHash = response.result;
self.web3.eth.getTransactionReceipt(txHash, (_err, _res) => {
simProvider.realSendAsync(payload, cb);
});
});
};
this.web3.setProvider(simProvider);
callback();
}