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import { expect, spy } from 'chai';
import fs from 'fs';
import sinon from 'sinon';
import { it, describe, before, beforeEach, after } from 'mocha';
import { Logger } from '../src/shared/logging';
import { backupLogFile, rotateOrDeleteFile } from '../src/main/logging';
import { LogLevel } from '../src/shared/logging-types';
const aPath = 'log-directory/a.log';
const oldAPath = 'log-directory/a.old.log';
const bPath = 'log-directory/b.log';
const oldBPath = 'log-directory/b.old.log';
const initialFileState = {
[aPath]: 'a',
[bPath]: 'b',
[oldBPath]: 'old b',
};
describe('Logging', () => {
let files: Record<string, string>;
let sandbox: sinon.SinonSandbox;
before(() => {
sandbox = sinon.createSandbox();
sandbox.stub(fs, 'accessSync').callsFake((path) => {
if (files[path as string] === undefined) {
throw Error('File not found');
}
});
sandbox.stub(fs, 'renameSync').callsFake((oldPath, newPath) => {
files[newPath as string] = files[oldPath as string];
fs.unlinkSync(oldPath);
});
sandbox.stub(fs, 'unlinkSync').callsFake((path) => {
delete files[path as string];
});
sandbox.stub(fs, 'readFileSync').callsFake((path) => {
return files[path as string] ?? '';
});
});
after(() => {
sandbox.restore();
});
beforeEach(() => {
files = { ...initialFileState };
});
it('should backup log file', () => {
backupLogFile(aPath);
const oldA = fs.readFileSync(oldAPath).toString();
expect(fs.accessSync.bind(null, aPath)).to.throw();
expect(oldA).to.equal(initialFileState[aPath]);
});
it('should replace backup file', () => {
backupLogFile(bPath);
const oldB = fs.readFileSync(oldBPath).toString();
expect(fs.accessSync.bind(null, bPath)).to.throw();
expect(oldB).to.equal(initialFileState[bPath]);
});
it('should clean up old log files', () => {
rotateOrDeleteFile(bPath);
const oldB = fs.readFileSync(oldBPath).toString();
expect(fs.accessSync.bind(null, bPath)).to.throw();
expect(oldB).to.equal(initialFileState[bPath]);
rotateOrDeleteFile(bPath);
expect(fs.accessSync.bind(null, bPath)).to.throw();
expect(fs.accessSync.bind(null, oldBPath)).to.throw();
});
it('should only log for the correct log level', () => {
const logger = new Logger();
const errorSpy = spy();
const warningSpy = spy();
const infoSpy = spy();
const verboseSpy = spy();
const debugSpy = spy();
logger.addOutput({ level: LogLevel.error, write: errorSpy });
logger.addOutput({ level: LogLevel.warning, write: warningSpy });
logger.addOutput({ level: LogLevel.info, write: infoSpy });
logger.addOutput({ level: LogLevel.verbose, write: verboseSpy });
logger.addOutput({ level: LogLevel.debug, write: debugSpy });
logger.error();
logger.warn();
logger.info();
logger.verbose();
logger.debug();
expect(errorSpy).to.have.been.called.exactly(1);
expect(warningSpy).to.have.been.called.exactly(2);
expect(infoSpy).to.have.been.called.exactly(3);
expect(verboseSpy).to.have.been.called.exactly(4);
expect(debugSpy).to.have.been.called.exactly(5);
});
it('should format JavaScript types correctly', async () => {
const logger = new Logger();
const promise = new Promise((resolve, _reject) => {
logger.addOutput({
level: LogLevel.info,
write: (_, message) => resolve(message.replace(/^.*\[info\] /, '')),
});
});
logger.info('zero', 'one two', 3, [4, 5, 'six', { seven: 'eight' }], {
nine: 10,
eleven: [true],
});
await expect(promise).to.eventually.be.fulfilled.then((result) => {
expect(result).to.equal(
'zero one two 3 [4,5,"six",{"seven":"eight"}] {"nine":10,"eleven":[true]}',
);
});
});
});
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