openethereum/js/src/util/subscribe-to-events.spec.js

116 lines
3.5 KiB
JavaScript

// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import { spy, stub } from 'sinon';
import subscribeToEvents from './subscribe-to-events';
import {
pastLogs, liveLogs, createApi, createContract
} from './subscribe-to-events.test.js';
const delay = (t) => new Promise((resolve) => {
setTimeout(resolve, t);
});
describe('util/subscribe-to-events', () => {
beforeEach(function () {
this.api = createApi();
this.contract = createContract(this.api);
});
it('installs a filter', async function () {
const { api, contract } = this;
subscribeToEvents(contract, [ 'Foo', 'Bar' ]);
await delay(0);
expect(api.eth.newFilter.calledOnce).to.equal(true);
expect(api.eth.newFilter.firstCall.args).to.eql([ {
fromBlock: 0, toBlock: 'latest',
address: contract.address,
topics: [ [
contract.instance.Foo.signature,
contract.instance.Bar.signature
] ]
} ]);
});
it('queries & parses logs in the beginning', async function () {
const { api, contract } = this;
subscribeToEvents(contract, [ 'Foo', 'Bar' ]);
await delay(0);
expect(api.eth.getFilterLogs.callCount).to.equal(1);
expect(api.eth.getFilterLogs.firstCall.args).to.eql([ 123 ]);
await delay(0);
expect(contract.parseEventLogs.callCount).to.equal(1);
});
it('emits logs in the beginning', async function () {
const { contract } = this;
const onLog = spy();
const onFoo = spy();
const onBar = spy();
subscribeToEvents(contract, [ 'Foo', 'Bar' ])
.on('log', onLog)
.on('Foo', onFoo)
.on('Bar', onBar);
await delay(0);
expect(onLog.callCount).to.equal(2);
expect(onLog.firstCall.args).to.eql([ pastLogs[0] ]);
expect(onLog.secondCall.args).to.eql([ pastLogs[1] ]);
expect(onFoo.callCount).to.equal(1);
expect(onFoo.firstCall.args).to.eql([ pastLogs[0] ]);
expect(onBar.callCount).to.equal(1);
expect(onBar.firstCall.args).to.eql([ pastLogs[1] ]);
});
it('uninstalls the filter on sunsubscribe', async function () {
const { api, contract } = this;
const s = subscribeToEvents(contract, [ 'Foo', 'Bar' ]);
await delay(0);
s.unsubscribe();
await delay(0);
expect(api.eth.uninstallFilter.calledOnce).to.equal(true);
expect(api.eth.uninstallFilter.firstCall.args).to.eql([ 123 ]);
});
it('checks for new events regularly', async function () {
const { api, contract } = this;
api.eth.getFilterLogs = stub().resolves([]);
const onLog = spy();
const onBar = spy();
const s = subscribeToEvents(contract, [ 'Bar' ], { interval: 5 })
.on('log', onLog)
.on('Bar', onBar);
await delay(9);
s.unsubscribe();
expect(onLog.callCount).to.equal(1);
expect(onLog.firstCall.args).to.eql([ liveLogs[0] ]);
expect(onBar.callCount).to.equal(1);
expect(onBar.firstCall.args).to.eql([ liveLogs[0] ]);
});
});