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import { BlockchainLifecycle, callbackErrorReporter } from '@0xproject/dev-utils';
import { DoneCallback } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as _ from 'lodash';
import 'mocha';
import * as Sinon from 'sinon';
import { ContractWrappers, DecodedLogEvent, ERC20TokenApprovalEventArgs, ERC20TokenEvents, Token } from '../src';
import { chaiSetup } from './utils/chai_setup';
import { constants } from './utils/constants';
import { tokenUtils } from './utils/token_utils';
import { provider, web3Wrapper } from './utils/web3_wrapper';
chaiSetup.configure();
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
describe('SubscriptionTest', () => {
let contractWrappers: ContractWrappers;
let userAddresses: string[];
let coinbase: string;
let addressWithoutFunds: string;
const config = {
networkId: constants.TESTRPC_NETWORK_ID,
};
before(async () => {
contractWrappers = new ContractWrappers(provider, config);
userAddresses = await web3Wrapper.getAvailableAddressesAsync();
coinbase = userAddresses[0];
addressWithoutFunds = userAddresses[1];
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('#subscribe', () => {
const indexFilterValues = {};
let tokenAddress: string;
const allowanceAmount = new BigNumber(42);
let stubs: Sinon.SinonStub[] = [];
before(() => {
const tokenAddresses = tokenUtils.getDummyERC20TokenAddresses();
tokenAddress = tokenAddresses[0];
});
afterEach(() => {
contractWrappers.erc20Token.unsubscribeAll();
_.each(stubs, s => s.restore());
stubs = [];
});
it('Should receive the Error when an error occurs while fetching the block', (done: DoneCallback) => {
(async () => {
const errMsg = 'Error fetching block';
const callback = callbackErrorReporter.assertNodeCallbackError(done, errMsg);
stubs = [Sinon.stub((contractWrappers as any)._web3Wrapper, 'getBlockAsync').throws(new Error(errMsg))];
contractWrappers.erc20Token.subscribe(
tokenAddress,
ERC20TokenEvents.Approval,
indexFilterValues,
callback,
);
await contractWrappers.erc20Token.setAllowanceAsync(
tokenAddress,
coinbase,
addressWithoutFunds,
allowanceAmount,
);
})().catch(done);
});
it('Should receive the Error when an error occurs while reconciling the new block', (done: DoneCallback) => {
(async () => {
const errMsg = 'Error fetching logs';
const callback = callbackErrorReporter.assertNodeCallbackError(done, errMsg);
stubs = [Sinon.stub((contractWrappers as any)._web3Wrapper, 'getLogsAsync').throws(new Error(errMsg))];
contractWrappers.erc20Token.subscribe(
tokenAddress,
ERC20TokenEvents.Approval,
indexFilterValues,
callback,
);
await contractWrappers.erc20Token.setAllowanceAsync(
tokenAddress,
coinbase,
addressWithoutFunds,
allowanceAmount,
);
})().catch(done);
});
it('Should allow unsubscribeAll to be called successfully after an error', (done: DoneCallback) => {
(async () => {
const callback = (err: Error | null, logEvent?: DecodedLogEvent<ERC20TokenApprovalEventArgs>) => _.noop;
contractWrappers.erc20Token.subscribe(
tokenAddress,
ERC20TokenEvents.Approval,
indexFilterValues,
callback,
);
stubs = [
Sinon.stub((contractWrappers as any)._web3Wrapper, 'getBlockAsync').throws(
new Error('JSON RPC error'),
),
];
contractWrappers.erc20Token.unsubscribeAll();
done();
})().catch(done);
});
});
});
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