log4js-node/test/tap/setLevel-asymmetry-test.js

// This test shows an asymmetry between setLevel and isLevelEnabled
// (in log4js-node@0.4.3 and earlier):
// 1) setLevel("foo") works, but setLevel(log4js.levels.foo) silently
//    does not (sets the level to TRACE).
// 2) isLevelEnabled("foo") works as does isLevelEnabled(log4js.levels.foo).
//

const { test } = require("tap");
const log4js = require("../../lib/log4js");

const logger = log4js.getLogger("test-setLevel-asymmetry");

// Define the array of levels as string to iterate over.
const strLevels = ["Trace", "Debug", "Info", "Warn", "Error", "Fatal"];
const log4jsLevels = strLevels.map(log4js.levels.getLevel);

test("log4js setLevel", batch => {
  strLevels.forEach(strLevel => {
    batch.test(`is called with a ${strLevel} as string`, t => {
      const log4jsLevel = log4js.levels.getLevel(strLevel);

      t.test("should convert string to level correctly", assert => {
        logger.level = strLevel;
        log4jsLevels.forEach(level => {
          assert.equal(
            logger.isLevelEnabled(level),
            log4jsLevel.isLessThanOrEqualTo(level)
          );
        });
        assert.end();
      });

      t.test("should also accept a Level", assert => {
        logger.level = log4jsLevel;
        log4jsLevels.forEach(level => {
          assert.equal(
            logger.isLevelEnabled(level),
            log4jsLevel.isLessThanOrEqualTo(level)
          );
        });
        assert.end();
      });

      t.end();
    });
  });
  batch.end();
});