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import 'mocha';
import * as chai from 'chai';
import * as _ from 'lodash';
import * as Sinon from 'sinon';
import * as Web3 from 'web3';
import BigNumber from 'bignumber.js';
import {chaiSetup} from './utils/chai_setup';
import {web3Factory} from './utils/web3_factory';
import {Web3Wrapper} from '../src/web3_wrapper';
import {EventWatcher} from '../src/mempool/event_watcher';
import {
ZeroEx,
LogEvent,
DecodedLogEvent,
} from '../src';
import {DoneCallback} from '../src/types';
chaiSetup.configure();
const expect = chai.expect;
describe('EventWatcher', () => {
let web3: Web3;
let stubs: Sinon.SinonStub[] = [];
let eventWatcher: EventWatcher;
let web3Wrapper: Web3Wrapper;
const logA = {
address: '0x71d271f8b14adef568f8f28f1587ce7271ac4ca5',
blockHash: null,
blockNumber: null,
data: '',
logIndex: null,
topics: [],
transactionHash: '0x004881d38cd4a8f72f1a0d68c8b9b8124504706041ff37019c1d1ed6bfda8e17',
transactionIndex: null,
};
const logB = {
address: '0x8d12a197cb00d4747a1fe03395095ce2a5cc6819',
blockHash: null,
blockNumber: null,
data: '',
logIndex: null,
topics: [ '0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567' ],
transactionHash: '0x01ef3c048b18d9b09ea195b4ed94cf8dd5f3d857a1905ff886b152cfb1166f25',
transactionIndex: null,
};
const logC = {
address: '0x1d271f8b174adef58f1587ce68f8f27271ac4ca5',
blockHash: null,
blockNumber: null,
data: '',
logIndex: null,
topics: [ '0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567' ],
transactionHash: '0x01ef3c048b18d9b09ea195b4ed94cf8dd5f3d857a1905ff886b152cfb1166f25',
transactionIndex: null,
};
before(async () => {
web3 = web3Factory.create();
const mempoolPollingIntervalMs = 10;
web3Wrapper = new Web3Wrapper(web3.currentProvider);
eventWatcher = new EventWatcher(web3Wrapper, mempoolPollingIntervalMs);
});
afterEach(() => {
// clean up any stubs after the test has completed
_.each(stubs, s => s.restore());
stubs = [];
eventWatcher.unsubscribe();
});
it('correctly emits initial log events', (done: DoneCallback) => {
const logs: Web3.LogEntry[] = [logA, logB];
const expectedLogEvents = [
{
removed: false,
...logA,
},
{
removed: false,
...logB,
},
];
const getLogsStub = Sinon.stub(web3Wrapper, 'getLogsAsync');
getLogsStub.onCall(0).returns(logs);
stubs.push(getLogsStub);
const callback = (event: LogEvent) => {
const expectedLogEvent = expectedLogEvents.shift();
expect(event).to.be.deep.equal(expectedLogEvent);
if (_.isEmpty(expectedLogEvents)) {
done();
}
};
eventWatcher.subscribe(callback);
});
it('correctly computes the difference and emits only changes', (done: DoneCallback) => {
const initialLogs: Web3.LogEntry[] = [logA, logB];
const changedLogs: Web3.LogEntry[] = [logA, logC];
const expectedLogEvents = [
{
removed: false,
...logA,
},
{
removed: false,
...logB,
},
{
removed: true,
...logB,
},
{
removed: false,
...logC,
},
];
const getLogsStub = Sinon.stub(web3Wrapper, 'getLogsAsync');
getLogsStub.onCall(0).returns(initialLogs);
getLogsStub.onCall(1).returns(changedLogs);
stubs.push(getLogsStub);
const callback = (event: LogEvent) => {
const expectedLogEvent = expectedLogEvents.shift();
expect(event).to.be.deep.equal(expectedLogEvent);
if (_.isEmpty(expectedLogEvents)) {
done();
}
};
eventWatcher.subscribe(callback);
});
});
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