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-rw-r--r--packages/0x.js/test/event_watcher_test.ts127
1 files changed, 127 insertions, 0 deletions
diff --git a/packages/0x.js/test/event_watcher_test.ts b/packages/0x.js/test/event_watcher_test.ts
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+++ b/packages/0x.js/test/event_watcher_test.ts
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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/order_watcher/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 numConfirmations = 0;
+ const logA: Web3.LogEntry = {
+ address: '0x71d271f8b14adef568f8f28f1587ce7271ac4ca5',
+ blockHash: null,
+ blockNumber: null,
+ data: '',
+ logIndex: null,
+ topics: [],
+ transactionHash: '0x004881d38cd4a8f72f1a0d68c8b9b8124504706041ff37019c1d1ed6bfda8e17',
+ transactionIndex: 0,
+ };
+ const logB: Web3.LogEntry = {
+ address: '0x8d12a197cb00d4747a1fe03395095ce2a5cc6819',
+ blockHash: null,
+ blockNumber: null,
+ data: '',
+ logIndex: null,
+ topics: [ '0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567' ],
+ transactionHash: '0x01ef3c048b18d9b09ea195b4ed94cf8dd5f3d857a1905ff886b152cfb1166f25',
+ transactionIndex: 0,
+ };
+ const logC: Web3.LogEntry = {
+ address: '0x1d271f8b174adef58f1587ce68f8f27271ac4ca5',
+ blockHash: null,
+ blockNumber: null,
+ data: '',
+ logIndex: null,
+ topics: [ '0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567' ],
+ transactionHash: '0x01ef3c048b18d9b09ea195b4ed94cf8dd5f3d857a1905ff886b152cfb1166f25',
+ transactionIndex: 0,
+ };
+ before(async () => {
+ web3 = web3Factory.create();
+ const pollingIntervalMs = 10;
+ web3Wrapper = new Web3Wrapper(web3.currentProvider);
+ eventWatcher = new EventWatcher(web3Wrapper, pollingIntervalMs);
+ });
+ 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);
+ });
+});