Clean logs on start - and eslint/mocha with code coverage (#1945)
* Clean logs on startup; install server-side testing/linting * Add eslint config, make all of app/ conform to its demands * Add Node.js testing and linting to CI * Lock project to Node.js 7.9.0, used by Electron 1.7.10 * New eslint error: trailing commas in function argumensts Node 7.9.0 doesn't like trailing commas, but Electron does * Move electron to devDependency, tell eslint it's built-in
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Scott Nonnenberg
GitHub
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21 changed files with 1782 additions and 316 deletions
17
test/.eslintrc.js
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17
test/.eslintrc.js
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// For reference: https://github.com/airbnb/javascript
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module.exports = {
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env: {
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mocha: true,
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},
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rules: {
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// We still get the value of this rule, it just allows for dev deps
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'import/no-extraneous-dependencies': ['error', {
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devDependencies: true
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}],
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// We want to keep each test structured the same, even if its contents are tiny
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'arrow-body-style': 'off',
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}
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};
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271
test/server/app/logging_test.js
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271
test/server/app/logging_test.js
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const fs = require('fs');
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const path = require('path');
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const tmp = require('tmp');
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const { expect } = require('chai');
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const {
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eliminateOutOfDateFiles,
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eliminateOldEntries,
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isLineAfterDate,
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fetchLog,
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fetch,
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} = require('../../../app/logging');
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describe('app/logging', () => {
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let basePath;
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let tmpDir;
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beforeEach(() => {
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tmpDir = tmp.dirSync({
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unsafeCleanup: true,
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});
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basePath = tmpDir.name;
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});
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afterEach((done) => {
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// we need the unsafe option to recursively remove the directory
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tmpDir.removeCallback(done);
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});
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describe('#isLineAfterDate', () => {
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it('returns false if falsy', () => {
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const actual = isLineAfterDate('', new Date());
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expect(actual).to.equal(false);
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});
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it('returns false if invalid JSON', () => {
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const actual = isLineAfterDate('{{}', new Date());
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expect(actual).to.equal(false);
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});
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it('returns false if date is invalid', () => {
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const line = JSON.stringify({ time: '2018-01-04T19:17:05.014Z' });
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const actual = isLineAfterDate(line, new Date('try6'));
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expect(actual).to.equal(false);
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});
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it('returns false if log time is invalid', () => {
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const line = JSON.stringify({ time: 'try7' });
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const date = new Date('2018-01-04T19:17:00.000Z');
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const actual = isLineAfterDate(line, date);
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expect(actual).to.equal(false);
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});
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it('returns false if date before provided date', () => {
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const line = JSON.stringify({ time: '2018-01-04T19:17:00.000Z' });
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const date = new Date('2018-01-04T19:17:05.014Z');
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const actual = isLineAfterDate(line, date);
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expect(actual).to.equal(false);
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});
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it('returns true if date is after provided date', () => {
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const line = JSON.stringify({ time: '2018-01-04T19:17:05.014Z' });
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const date = new Date('2018-01-04T19:17:00.000Z');
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const actual = isLineAfterDate(line, date);
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expect(actual).to.equal(true);
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});
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});
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describe('#eliminateOutOfDateFiles', () => {
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it('deletes an empty file', () => {
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const date = new Date();
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const log = '\n';
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const target = path.join(basePath, 'log.log');
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fs.writeFileSync(target, log);
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return eliminateOutOfDateFiles(basePath, date).then(() => {
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expect(fs.existsSync(target)).to.equal(false);
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});
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});
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it('deletes a file with invalid JSON lines', () => {
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const date = new Date();
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const log = '{{}\n';
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const target = path.join(basePath, 'log.log');
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fs.writeFileSync(target, log);
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return eliminateOutOfDateFiles(basePath, date).then(() => {
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expect(fs.existsSync(target)).to.equal(false);
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});
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});
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it('deletes a file with all dates before provided date', () => {
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const date = new Date('2018-01-04T19:17:05.014Z');
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const contents = [
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JSON.stringify({ time: '2018-01-04T19:17:00.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:01.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:02.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const target = path.join(basePath, 'log.log');
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fs.writeFileSync(target, contents);
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return eliminateOutOfDateFiles(basePath, date).then(() => {
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expect(fs.existsSync(target)).to.equal(false);
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});
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});
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it('keeps a file with first line date before provided date', () => {
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const date = new Date('2018-01-04T19:16:00.000Z');
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const contents = [
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JSON.stringify({ time: '2018-01-04T19:17:00.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:01.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:02.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const target = path.join(basePath, 'log.log');
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fs.writeFileSync(target, contents);
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return eliminateOutOfDateFiles(basePath, date).then(() => {
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expect(fs.existsSync(target)).to.equal(true);
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});
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});
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it('keeps a file with last line date before provided date', () => {
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const date = new Date('2018-01-04T19:17:01.000Z');
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const contents = [
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JSON.stringify({ time: '2018-01-04T19:17:00.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:01.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:02.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const target = path.join(basePath, 'log.log');
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fs.writeFileSync(target, contents);
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return eliminateOutOfDateFiles(basePath, date).then(() => {
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expect(fs.existsSync(target)).to.equal(true);
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});
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});
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});
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describe('#eliminateOldEntries', () => {
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it('eliminates all non-parsing entries', () => {
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const date = new Date('2018-01-04T19:17:01.000Z');
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const contents = [
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'random line',
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JSON.stringify({ time: '2018-01-04T19:17:01.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:02.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const expected = [
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JSON.stringify({ time: '2018-01-04T19:17:01.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:02.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const target = path.join(basePath, 'log.log');
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const files = [{
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path: target,
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}];
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fs.writeFileSync(target, contents);
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return eliminateOldEntries(files, date).then(() => {
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expect(fs.readFileSync(target, 'utf8')).to.equal(`${expected}\n`);
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});
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});
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it('preserves all lines if before target date', () => {
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const date = new Date('2018-01-04T19:17:03.000Z');
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const contents = [
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'random line',
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JSON.stringify({ time: '2018-01-04T19:17:01.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:02.014Z' }),
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const expected = [
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JSON.stringify({ time: '2018-01-04T19:17:03.014Z' }),
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].join('\n');
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const target = path.join(basePath, 'log.log');
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const files = [{
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path: target,
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}];
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fs.writeFileSync(target, contents);
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return eliminateOldEntries(files, date).then(() => {
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expect(fs.readFileSync(target, 'utf8')).to.equal(`${expected}\n`);
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});
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});
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});
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describe('#fetchLog', () => {
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it('returns error if file does not exist', () => {
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const target = 'random_file';
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return fetchLog(target).then(() => {
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throw new Error('Expected an error!');
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}, (error) => {
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expect(error).to.have.property('message').that.match(/random_file/);
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});
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});
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it('returns empty array if file has no valid JSON lines', () => {
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const contents = 'line 1\nline2\n';
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const expected = [];
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const target = path.join(basePath, 'test.log');
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fs.writeFileSync(target, contents);
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return fetchLog(target).then((result) => {
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expect(result).to.deep.equal(expected);
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});
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});
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it('returns just three fields in each returned line', () => {
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const contents = [
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JSON.stringify({
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one: 1,
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two: 2,
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level: 1,
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time: 2,
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msg: 3,
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}),
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JSON.stringify({
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one: 1,
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two: 2,
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level: 2,
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time: 3,
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msg: 4,
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}),
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'',
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].join('\n');
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const expected = [{
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level: 1,
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time: 2,
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msg: 3,
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}, {
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level: 2,
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time: 3,
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msg: 4,
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}];
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const target = path.join(basePath, 'test.log');
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fs.writeFileSync(target, contents);
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return fetchLog(target).then((result) => {
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expect(result).to.deep.equal(expected);
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});
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});
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});
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describe('#fetch', () => {
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it('returns single entry if no files', () => {
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return fetch(basePath).then((results) => {
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expect(results).to.have.length(1);
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expect(results[0].msg).to.match(/Loaded this list/);
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});
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});
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it('returns sorted entries from all files', () => {
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const first = [
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JSON.stringify({ msg: 2, time: '2018-01-04T19:17:05.014Z' }),
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'',
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].join('\n');
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const second = [
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JSON.stringify({ msg: 1, time: '2018-01-04T19:17:00.014Z' }),
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JSON.stringify({ msg: 3, time: '2018-01-04T19:18:00.014Z' }),
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'',
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].join('\n');
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fs.writeFileSync(path.join(basePath, 'first.log'), first);
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fs.writeFileSync(path.join(basePath, 'second.log'), second);
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return fetch(basePath).then((results) => {
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expect(results).to.have.length(4);
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expect(results[0].msg).to.equal(1);
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expect(results[1].msg).to.equal(2);
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expect(results[2].msg).to.equal(3);
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});
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});
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});
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});
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