A port of log4js to node.js

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Recording Appender

This appender stores the log events in memory. It is mainly useful for testing (see the tests for the category filter, for instance).


There is no other configuration for this appender.


The array that stores log events is shared across all recording appender instances, and is accessible from the recording module. require('<LOG4JS LIB DIR>/appenders/recording') returns a module with the following functions exported:


const recording = require("log4js/lib/appenders/recording");
const log4js = require("log4js");
  appenders: { vcr: { type: "recording" } },
  categories: { default: { appenders: ["vcr"], level: "info" } },

const logger = log4js.getLogger();
logger.info("some log event");

const events = recording.replay(); // events is an array of LogEvent objects.
recording.erase(); // clear the appender's array.