Move Logger configuration into Cylon#config

lib/config.js

@@ -8,4 +8,6 @@
 
 'use strict';
 
-module.exports = {};
+module.exports = {
+  logging: {}
+};

lib/cylon.js

@@ -95,12 +95,18 @@ Cylon.start = function start() {
 //
 // Returns the current config
 Cylon.config = function(opts) {
+  var loggingChanged = (opts.logging && Config.logging !== opts.logging);
+
   if (opts && typeof(opts) === 'object' && !Array.isArray(opts)) {
     for (var o in opts) {
       Config[o] = opts[o];
     }
   }
 
+  if (loggingChanged) {
+    Logger.setup();
+  }
+
   return Config;
 };
 

lib/logger.js

@@ -11,7 +11,8 @@
 var levels = ["debug", "info", "warn", "error", "fatal"];
 
 var BasicLogger = require('./logger/basic_logger'),
-    NullLogger = require('./logger/null_logger');
+    NullLogger = require('./logger/null_logger'),
+    Config = require('./config');
 
 // The Logger is a global object to facilitate logging stuff to the console (or
 // other output) easily and consistently. It's available anywhere in Cylon, as
@@ -27,7 +28,10 @@ var Logger = module.exports = {};
 // or above
 //
 // Returns the new logger instance
-Logger.setup = function setup(logger, level) {
+Logger.setup = function setup() {
+  var logger = Config.logging.logger,
+      level  = Config.logging.level || "info";
+
   if (logger == null) { logger = BasicLogger; }
 
   this.logger = logger || NullLogger;
@@ -55,7 +59,7 @@ var setLogLevel = function(level) {
       ignored;
 
   if (index < 0) {
-    throw new Error("Invalid Log Level specified");
+    throw new Error("Invalid Log Level specified: " + level);
   }
 
   active = levels.slice(index);

spec/helper.js

@@ -31,6 +31,9 @@ var Cylon = source('cylon');
 
 Cylon.config({
   mode: "manual",
+  logging: {
+    logger: false
+  }
 });
 
-Cylon.Logger.setup(false);
+Cylon.Logger.setup();

spec/lib/cylon.spec.js

@@ -101,6 +101,12 @@ describe("Cylon", function() {
       for (var c in Config) {
         delete Config[c];
       }
+
+      stub(Logger, 'setup');
+    });
+
+    afterEach(function() {
+      Logger.setup.restore();
     });
 
     it("sets config variables", function() {
@@ -127,6 +133,14 @@ describe("Cylon", function() {
       Cylon.config("hello world");
       expect(Config).to.be.eql(config);
     });
+
+    it("updates the Logger setup if that changed", function() {
+      Cylon.config({ a: 1 });
+      expect(Logger.setup).to.not.be.called;
+
+      Cylon.config({ a: 1, logging: { logger: false } });
+      expect(Logger.setup).to.be.called;
+    })
   });
 
   describe("#halt", function() {

spec/lib/logger.spec.js

@@ -1,16 +1,20 @@
 'use strict';
 
 var Logger = source('logger'),
+    Config = source('config'),
     Utils = source('utils');
 
 describe('Logger', function() {
   afterEach(function() {
-    Logger.setup(false); // to be friendly to other specs
+    // to be friendly to other specs
+    Config.logging = { logger: false, level: 'debug' };
+    Logger.setup();
   });
 
   describe("#setup", function() {
     context("with no arguments", function() {
       it("sets up a BasicLogger", function() {
+        Config.logging = {};
         Logger.setup();
         expect(Logger.toString()).to.be.eql("BasicLogger");
       });
@@ -18,7 +22,8 @@ describe('Logger', function() {
 
     context("with false", function() {
       it("sets up a NullLogger", function() {
-        Logger.setup(false);
+        Config.logging = { logger: false };
+        Logger.setup();
         expect(Logger.toString()).to.be.eql("NullLogger");
       });
     });
@@ -26,7 +31,8 @@ describe('Logger', function() {
     context("with a custom logger", function() {
       it("uses the custom logger", function() {
         var logger = { toString: function() { return "custom"; } };
-        Logger.setup(logger);
+        Config.logging = { logger: logger };
+        Logger.setup();
         expect(Logger.toString()).to.be.eql("custom");
       });
     });
@@ -36,7 +42,7 @@ describe('Logger', function() {
     var logger;
 
     beforeEach(function() {
-      logger = {
+      logger = Config.logging.logger = {
         debug: spy(),
         info: spy(),
         warn: spy(),
@@ -44,7 +50,7 @@ describe('Logger', function() {
         fatal: spy()
       };
 
-      Logger.setup(logger);
+      Logger.setup();
     });
 
     describe("#debug", function() {
@@ -95,7 +101,12 @@ describe('Logger', function() {
         fatal: spy()
       };
 
-      Logger.setup(logger, 'warn');
+      Config.logging = {
+        logger: logger,
+        level: 'warn'
+      }
+
+      Logger.setup();
     });
 
     it("prevents logging of anything below the specified log level", function() {
@@ -115,5 +126,16 @@ describe('Logger', function() {
       expect(logger.error).to.be.calledWith('error message');
       expect(logger.fatal).to.be.calledWith('fatal message');
     });
+
+    it("defaults to 'info' level", function() {
+      delete Config.logging.level;
+      Logger.setup();
+
+      Logger.debug("debug message");
+      Logger.info("info message");
+
+      expect(logger.debug).to.not.be.called;
+      expect(logger.info).to.be.calledWith('info message');
+    })
   });
 });