added mocha, simplified logger by removing levels and making immutable

lib/logger.js

@@ -1,80 +1,49 @@
 "use strict";
 var debug = require('./debug')('logger')
-, levels = require('./levels')
-, util = require('util')
-, DEFAULT_CATEGORY = '[default]';
+, util = require('util');
+
+module.exports = function Logger(dispatch, category) {
+  if (typeof dispatch !== 'function') {
+    throw new Error("Logger must have a dispatch delegate.");
+  }
+
+  if (!category) {
+    throw new Error("Logger must have a category.");
+  }
+
+  function log() {
+    var args = Array.prototype.slice.call(arguments)
+    , logLevel = args.shift()
+    , loggingEvent = new LoggingEvent(category, logLevel, args);
+    debug("Logging event " + loggingEvent + " to dispatch = " + util.inspect(dispatch));
+    dispatch(loggingEvent);
+  }
+
+  var self = this;
+  ['trace','debug','info','warn','error','fatal'].forEach(
+    function(level) {
+      self[level] = function() {
+        var args = Array.prototype.slice.call(arguments);
+        args.unshift(level);
+        log.apply(this, args);
+      };
+    }
+  );
+
+};
 
 /**
  * Models a logging event.
  * @constructor
- * @param {String} categoryName name of category
+ * @param {String} category name of category
  * @param {Log4js.Level} level level of message
  * @param {Array} data objects to log
  * @author Seth Chisamore
  */
-function LoggingEvent (categoryName, level, data) {
+function LoggingEvent (category, level, data) {
   this.startTime = new Date();
-  this.categoryName = categoryName;
+  this.category = category;
   this.data = data;
   this.level = level;
 }
 
-/**
- * Logger to log messages.
- * use {@see Log4js#getLogger(String)} to get an instance.
- * @constructor
- * @param name name of category to log to
- * @author Stephan Strittmatter
- */
-function Logger (name, level, dispatch) {
-  this.category = name || DEFAULT_CATEGORY;
-  
-  if (level) {
-    this.setLevel(level);
-  }
-
-  this.dispatch = dispatch;
-}
-Logger.DEFAULT_CATEGORY = DEFAULT_CATEGORY;
-Logger.prototype.level = levels.TRACE;
-
-Logger.prototype.setLevel = function(level) {
-  debug("setting level to " + level);
-  this.level = levels.toLevel(level, this.level || levels.TRACE);
-};
-
-Logger.prototype.removeLevel = function() {
-  delete this.level;
-};
-
-Logger.prototype.log = function() {
-  var args = Array.prototype.slice.call(arguments)
-  , logLevel = args.shift()
-  , loggingEvent = new LoggingEvent(this.category, logLevel, args);
-  debug("Logging event " + loggingEvent + " to dispatch = " + util.inspect(this.dispatch));
-  this.dispatch(loggingEvent);
-};
-
-Logger.prototype.isLevelEnabled = function(otherLevel) {
-  return this.level.isLessThanOrEqualTo(otherLevel);
-};
-
-['Trace','Debug','Info','Warn','Error','Fatal'].forEach(
-  function(levelString) {
-    var level = levels.toLevel(levelString);
-    Logger.prototype['is'+levelString+'Enabled'] = function() {
-      return this.isLevelEnabled(level);
-    };
-    
-    Logger.prototype[levelString.toLowerCase()] = function () {
-      if (this.isLevelEnabled(level)) {
-        var args = Array.prototype.slice.call(arguments);
-        args.unshift(level);
-        Logger.prototype.log.apply(this, args);
-      }
-    };
-  }
-);
-
-exports.LoggingEvent = LoggingEvent;
-exports.Logger = Logger;

package.json

@@ -38,6 +38,8 @@
     "vows": "0.7.0",
     "sandboxed-module": "0.1.3",
     "hook.io": "0.8.10",
-    "underscore": "1.2.1"
+    "underscore": "1.2.1",
+    "mocha": "~1.12.0",
+    "should": "~1.2.2"
   }
 }

test/logger-test.js

@@ -1,72 +1,52 @@
 "use strict";
-var vows = require('vows')
-, assert = require('assert')
-, levels = require('../lib/levels')
-, Logger = require('../lib/logger').Logger
-, log4js = require('../lib/log4js');
+var should = require('should')
+, Logger = require('../lib/logger');
 
-vows.describe('../lib/logger').addBatch({
-  'constructor with no parameters': {
-    topic: new Logger(),
-    'should use default category': function(logger) {
-      assert.equal(logger.category, Logger.DEFAULT_CATEGORY);
-    },
-    'should use TRACE log level': function(logger) {
-      assert.equal(logger.level, levels.TRACE);
-    }
-  },
+describe('../lib/logger', function() {
+  describe('Logger constructor', function() {
+    it('must be passed a dispatch delegate and a category', function() {
+      (function() { new Logger(); }).should.throw(
+        "Logger must have a dispatch delegate."
+      );
+      (function() { new Logger(function() {}); }).should.throw(
+        "Logger must have a category."
+      );
+    });
 
-  'constructor with category': {
-    topic: new Logger('cheese'),
-    'should use category': function(logger) {
-      assert.equal(logger.category, 'cheese');
-    },
-    'should use TRACE log level': function(logger) {
-      assert.equal(logger.level, levels.TRACE);
-    }
-  },
+  });
 
-  'constructor with category and level': {
-    topic: new Logger('cheese', 'debug'),
-    'should use category': function(logger) {
-      assert.equal(logger.category, 'cheese');
-    },
-    'should use level': function(logger) {
-      assert.equal(logger.level, levels.DEBUG);
-    }
-  },
+  describe('Logger instance', function() {
+    var event
+    , logger = new Logger(
+      function(evt) { event = evt; },
+      "exciting category"
+    );
 
-  'isLevelEnabled': {
-    topic: new Logger('cheese', 'info'),
-    'should provide a level enabled function for all levels': function(logger) {
-      assert.isFunction(logger.isTraceEnabled);
-      assert.isFunction(logger.isDebugEnabled);
-      assert.isFunction(logger.isInfoEnabled);
-      assert.isFunction(logger.isWarnEnabled);
-      assert.isFunction(logger.isErrorEnabled);
-      assert.isFunction(logger.isFatalEnabled);
-    },
-    'should return the right values': function(logger) {
-      assert.isFalse(logger.isTraceEnabled());
-      assert.isFalse(logger.isDebugEnabled());
-      assert.isTrue(logger.isInfoEnabled());
-      assert.isTrue(logger.isWarnEnabled());
-      assert.isTrue(logger.isErrorEnabled());
-      assert.isTrue(logger.isFatalEnabled());
-    }
-  },
+    beforeEach(function() {
+      event = null;
+    });
+
+    it('should be immutable', function() {
+      logger.category = "rubbish";
+      logger.debug("thing");
+
+      event.category.should.equal("exciting category");
+    });
+
+    ['trace', 'debug', 'info', 'warn', 'error', 'fatal'].forEach(function(level) {
+      it('should have a ' + level + ' function', function() {
+        logger[level].should.be.a('function');
+      });
+    });
+
+    it('should send log events to the dispatch delegate', function() {
+      logger.debug("interesting thing");
+      event.should.have.property('category').equal('exciting category');
+      event.should.have.property('level').equal('debug');
+      event.should.have.property('data').eql(["interesting thing"]);
+      event.should.have.property('startTime');
+    });
+  });
+  
+});
 
-  'log': {
-    topic: function() {
-      var evt
-      , logger = new Logger('testing', null, function(event) { evt = event; });
-      logger.log(levels.DEBUG, "cheese");
-      return evt;
-    },
-    'should send log events to log4js': function(evt) {
-      assert.equal(evt.categoryName, 'testing');
-      assert.equal(evt.level, levels.DEBUG);
-      assert.equal(evt.data[0], "cheese");
-    }
-  }
-}).exportTo(module);