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import { RevertReason } from '@0xproject/types';
import * as chai from 'chai';
import { TransactionReceipt, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
import * as _ from 'lodash';
import { constants } from './constants';
import { web3Wrapper } from './web3_wrapper';
const expect = chai.expect;
function _expectEitherErrorAsync<T>(p: Promise<T>, error1: string, error2: string): PromiseLike<void> {
return expect(p)
.to.be.rejected()
.then(e => {
expect(e).to.satisfy(
(err: Error) => _.includes(err.message, error1) || _.includes(err.message, error2),
`expected promise to reject with error message that includes "${error1}" or "${error2}", but got: ` +
`"${e.message}"\n`,
);
});
}
/**
* Rejects if the given Promise does not reject with an error indicating
* insufficient funds.
* @param p the Promise which is expected to reject
* @returns a new Promise which will reject if the conditions are not met and
* otherwise resolve with no value.
*/
export function expectInsufficientFundsAsync<T>(p: Promise<T>): PromiseLike<void> {
return _expectEitherErrorAsync(p, 'insufficient funds', "sender doesn't have enough funds");
}
/**
* Rejects if the given Promise does not reject with a "revert" error or the
* given otherError.
* @param p the Promise which is expected to reject
* @param otherError the other error which is accepted as a valid reject error.
* @returns a new Promise which will reject if the conditions are not met and
* otherwise resolve with no value.
*/
export function expectRevertOrOtherErrorAsync<T>(p: Promise<T>, otherError: string): PromiseLike<void> {
return _expectEitherErrorAsync(p, constants.REVERT, otherError);
}
/**
* Rejects if the given Promise does not reject with a "revert" or "always
* failing transaction" error.
* @param p the Promise which is expected to reject
* @returns a new Promise which will reject if the conditions are not met and
* otherwise resolve with no value.
*/
export function expectRevertOrAlwaysFailingTransactionAsync<T>(p: Promise<T>): PromiseLike<void> {
return expectRevertOrOtherErrorAsync(p, 'always failing transaction');
}
/**
* Rejects if at least one the following conditions is not met:
* 1) The given Promise rejects with the given revert reason.
* 2) The given Promise rejects with an error containing "always failing transaction"
* 3) The given Promise fulfills with a txReceipt that has a status of 0 or '0', indicating the transaction failed.
* 4) The given Promise fulfills with a txHash and corresponding txReceipt has a status of 0 or '0'.
* @param p the Promise which is expected to reject
* @param reason a specific revert reason
* @returns a new Promise which will reject if the conditions are not met and
* otherwise resolve with no value.
*/
export async function expectRevertReasonOrAlwaysFailingTransactionAsync(
p: Promise<string | TransactionReceiptWithDecodedLogs | TransactionReceipt>,
reason: RevertReason,
): Promise<void> {
return p
.then(async result => {
let txReceiptStatus: string | 0 | 1 | null;
if (typeof result === 'string') {
// Result is a txHash. We need to make a web3 call to get the receipt.
const txReceipt = await web3Wrapper.awaitTransactionMinedAsync(result);
txReceiptStatus = txReceipt.status;
} else if ('status' in result) {
// Result is a TransactionReceiptWithDecodedLogs or TransactionReceipt
// and status is a field of result.
txReceiptStatus = result.status;
} else {
throw new Error('Unexpected result type');
}
expect(_.toString(txReceiptStatus)).to.equal(
'0',
'transactionReceipt had a non-zero status, indicating success',
);
})
.catch(err => {
expect(err.message).to.satisfy(
(msg: string) => _.includes(msg, reason) || _.includes(msg, 'always failing transaction'),
`Expected ${reason} or 'always failing transaction' but error message was ${err.message}`,
);
});
}
/**
* Rejects if the given Promise does not reject with a "revert" or "Contract
* call failed" error.
* @param p the Promise which is expected to reject
* @returns a new Promise which will reject if the conditions are not met and
* otherwise resolve with no value.
*/
export function expectRevertOrContractCallFailedAsync<T>(p: Promise<T>): PromiseLike<void> {
return expectRevertOrOtherErrorAsync<T>(p, 'Contract call failed');
}
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