log4js-node/test/tap/subcategories-test.js

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

test("subcategories", batch => {
  batch.test("loggers created after levels configuration is loaded", t => {
    log4js.configure({
      appenders: { stdout: { type: "stdout" } },
      categories: {
        default: { appenders: ["stdout"], level: "TRACE" },
        sub1: { appenders: ["stdout"], level: "WARN" },
        "sub1.sub11": { appenders: ["stdout"], level: "TRACE" },
        "sub1.sub11.sub111": { appenders: ["stdout"], level: "WARN" },
        "sub1.sub12": { appenders: ["stdout"], level: "INFO" }
      }
    });

    const loggers = {
      sub1: log4js.getLogger("sub1"), // WARN
      sub11: log4js.getLogger("sub1.sub11"), // TRACE
      sub111: log4js.getLogger("sub1.sub11.sub111"), // WARN
      sub12: log4js.getLogger("sub1.sub12"), // INFO

      sub13: log4js.getLogger("sub1.sub13"), // Inherits sub1: WARN
      sub112: log4js.getLogger("sub1.sub11.sub112"), // Inherits sub1.sub11: TRACE
      sub121: log4js.getLogger("sub1.sub12.sub121"), // Inherits sub12: INFO
      sub0: log4js.getLogger("sub0") // Not defined, not inherited: TRACE
    };

    t.test("check logger levels", assert => {
      assert.equal(loggers.sub1.level, log4js.levels.WARN);
      assert.equal(loggers.sub11.level, log4js.levels.TRACE);
      assert.equal(loggers.sub111.level, log4js.levels.WARN);
      assert.equal(loggers.sub12.level, log4js.levels.INFO);

      assert.equal(loggers.sub13.level, log4js.levels.WARN);
      assert.equal(loggers.sub112.level, log4js.levels.TRACE);
      assert.equal(loggers.sub121.level, log4js.levels.INFO);
      assert.equal(loggers.sub0.level, log4js.levels.TRACE);
      assert.end();
    });

    t.end();
  });

  batch.test("loggers created before levels configuration is loaded", t => {
    // reset to defaults
    log4js.configure({
      appenders: { stdout: { type: "stdout" } },
      categories: { default: { appenders: ["stdout"], level: "info" } }
    });

    // these should all get the default log level of INFO
    const loggers = {
      sub1: log4js.getLogger("sub1"), // WARN
      sub11: log4js.getLogger("sub1.sub11"), // TRACE
      sub111: log4js.getLogger("sub1.sub11.sub111"), // WARN
      sub12: log4js.getLogger("sub1.sub12"), // INFO

      sub13: log4js.getLogger("sub1.sub13"), // Inherits sub1: WARN
      sub112: log4js.getLogger("sub1.sub11.sub112"), // Inherits sub1.sub11: TRACE
      sub121: log4js.getLogger("sub1.sub12.sub121"), // Inherits sub12: INFO
      sub0: log4js.getLogger("sub0") // Not defined, not inherited: TRACE
    };

    log4js.configure({
      appenders: { stdout: { type: "stdout" } },
      categories: {
        default: { appenders: ["stdout"], level: "TRACE" },
        sub1: { appenders: ["stdout"], level: "WARN" },
        "sub1.sub11": { appenders: ["stdout"], level: "TRACE" },
        "sub1.sub11.sub111": { appenders: ["stdout"], level: "WARN" },
        "sub1.sub12": { appenders: ["stdout"], level: "INFO" }
      }
    });

    t.test("should still get new levels", assert => {
      // can't use .equal because by calling log4js.configure we create new instances
      assert.same(loggers.sub1.level, log4js.levels.WARN);
      assert.same(loggers.sub11.level, log4js.levels.TRACE);
      assert.same(loggers.sub111.level, log4js.levels.WARN);
      assert.same(loggers.sub12.level, log4js.levels.INFO);

      assert.same(loggers.sub13.level, log4js.levels.WARN);
      assert.same(loggers.sub112.level, log4js.levels.TRACE);
      assert.same(loggers.sub121.level, log4js.levels.INFO);
      assert.same(loggers.sub0.level, log4js.levels.TRACE);
      assert.end();
    });
    t.end();
  });

  batch.test(
    "setting level on subcategories should not set parent level",
    t => {
      log4js.configure({
        appenders: { stdout: { type: "stdout" } },
        categories: {
          default: { appenders: ["stdout"], level: "trace" },
          parent: { appenders: ["stdout"], level: "error" }
        }
      });

      const logger = log4js.getLogger("parent");
      const subLogger = log4js.getLogger("parent.child");

      t.test("should inherit parent level", assert => {
        assert.same(subLogger.level, log4js.levels.ERROR);
        assert.end();
      });

      t.test("changing child level should not change parent level", assert => {
        subLogger.level = "info";
        assert.same(subLogger.level, log4js.levels.INFO);
        assert.same(logger.level, log4js.levels.ERROR);
        assert.end();
      });

      t.end();
    }
  );

  batch.end();
});