@linkedmink/multilevel-aging-cache/tests/shared/Logger.test.ts

Package provides an interface to cache and persist data to Redis, MongoDB, memory

import winston from 'winston';

import { Logger } from 'shared/Logger';

describe(Logger.name, () => {
  test('should return shared instance when label is the same', () => {
    const testLabel = 'TEST';

    const logger1 = Logger.get(testLabel);
    const logger2 = Logger.get(testLabel);

    expect(logger1).toBe(logger2);
  });

  test("should construct new loggers with global options when they're changed", () => {
    const testExitOnErrorFunc = jest.fn();
    const testOptions: winston.LoggerOptions = {
      exitOnError: testExitOnErrorFunc,
    };

    const logger1 = Logger.get('LOGGER1');
    Logger.options = testOptions;
    const logger2 = Logger.get('LOGGER2');

    expect(logger1.exitOnError).not.toBe(testExitOnErrorFunc);
    expect(logger2.exitOnError).toBe(testExitOnErrorFunc);
  });
});