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3a65847aa7
* Migrate to jest * Use --force-exit until dns close handle issue https://github.com/facebook/jest/issues/9982 Co-authored-by: Ivar Conradi Østhus <ivarconr@gmail.com>
98 lines
2.6 KiB
JavaScript
98 lines
2.6 KiB
JavaScript
'use strict';
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const { EventEmitter } = require('events');
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const ClientMetricStore = require('./client-metrics-store');
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const getLogger = require('../../test/fixtures/no-logger');
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function getMockDb() {
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const list = [
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{ id: 4, metrics: { appName: 'test' } },
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{ id: 3, metrics: { appName: 'test' } },
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{ id: 2, metrics: { appName: 'test' } },
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];
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return {
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getMetricsLastHour() {
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return Promise.resolve([{ id: 1, metrics: { appName: 'test' } }]);
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},
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getNewMetrics() {
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return Promise.resolve([list.pop() || { id: 0 }]);
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},
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destroy() {
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// noop
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},
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};
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}
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test('should call database on startup', done => {
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jest.useFakeTimers('modern');
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const mock = getMockDb();
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const ee = new EventEmitter();
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const store = new ClientMetricStore(mock, ee, getLogger);
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jest.runAllTicks();
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expect.assertions(2);
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store.on('metrics', metrics => {
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expect(store.highestIdSeen).toBe(1);
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expect(metrics.appName).toBe('test');
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store.destroy();
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done();
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});
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});
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test('should start poller even if initial database fetch fails', done => {
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jest.useFakeTimers('modern');
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getLogger.setMuteError(true);
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const mock = getMockDb();
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mock.getMetricsLastHour = () => Promise.reject(new Error('oops'));
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const ee = new EventEmitter();
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const store = new ClientMetricStore(mock, ee, getLogger, 100);
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jest.runAllTicks();
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const metrics = [];
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store.on('metrics', m => metrics.push(m));
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store.on('ready', () => {
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jest.useFakeTimers('modern');
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expect(metrics).toHaveLength(0);
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jest.advanceTimersByTime(300);
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jest.useRealTimers();
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process.nextTick(() => {
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expect(metrics).toHaveLength(3);
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expect(store.highestIdSeen).toBe(4);
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store.destroy();
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done();
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});
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});
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getLogger.setMuteError(false);
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});
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test('should poll for updates', done => {
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jest.useFakeTimers('modern');
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const mock = getMockDb();
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const ee = new EventEmitter();
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const store = new ClientMetricStore(mock, ee, getLogger, 100);
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jest.runAllTicks();
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const metrics = [];
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store.on('metrics', m => metrics.push(m));
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expect(metrics).toHaveLength(0);
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store.on('ready', () => {
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jest.useFakeTimers('modern');
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expect(metrics).toHaveLength(1);
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jest.advanceTimersByTime(300);
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jest.useRealTimers();
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process.nextTick(() => {
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expect(metrics).toHaveLength(4);
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expect(store.highestIdSeen).toBe(4);
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store.destroy();
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done();
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});
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});
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});
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