feat(ngLog): provides support to debug the application in chosen level

src/ng/log.js

@@ -45,6 +45,7 @@
  */
 function $LogProvider(){
   var debug = true,
+      level = 'log',
       self = this;
 
   /**
@@ -63,6 +64,15 @@ function $LogProvider(){
     }
   };
 
+  this.debugLevel = function(flag) {
+    if (isDefined(flag)) {
+      level = flag;
+    return this;
+    } else {
+      return level;
+    }
+  };
+
   this.$get = ['$window', function($window){
     return {
       /**
@@ -72,7 +82,15 @@ function $LogProvider(){
        * @description
        * Write a log message
        */
-      log: consoleLog('log'),
+      log: (function () {
+        var fn = consoleLog('log');
+
+        return function() {
+          if (level == 'log') {
+            fn.apply(self, arguments);
+          }
+        };
+      }()),
 
       /**
        * @ngdoc method
@@ -81,7 +99,15 @@ function $LogProvider(){
        * @description
        * Write an information message
        */
-      info: consoleLog('info'),
+      info: (function () {
+        var fn = consoleLog('info');
+
+        return function() {
+          if (level == 'log' || level == 'info') {
+            fn.apply(self, arguments);
+          }
+        };
+      }()),
 
       /**
        * @ngdoc method
@@ -90,7 +116,15 @@ function $LogProvider(){
        * @description
        * Write a warning message
        */
-      warn: consoleLog('warn'),
+      warn: (function () {
+        var fn = consoleLog('warn');
+
+        return function() {
+          if (level == 'log' || level == 'info' || level == 'warn') {
+            fn.apply(self, arguments);
+          }
+        };
+      }()),
 
       /**
        * @ngdoc method
@@ -99,7 +133,15 @@ function $LogProvider(){
        * @description
        * Write an error message
        */
-      error: consoleLog('error'),
+      error: (function () {
+        var fn = consoleLog('error');
+
+        return function() {
+          if (level == 'log' || level == 'info' || level == 'warn' || level == 'error') {
+            fn.apply(self, arguments);
+          }
+        };
+      }()),
 
       /**
        * @ngdoc method
@@ -133,6 +175,7 @@ function $LogProvider(){
     }
 
     function consoleLog(type) {
+
       var console = $window.console || {},
           logFn = console[type] || console.log || noop,
           hasApply = false;

test/ng/logSpec.js

@@ -1,9 +1,10 @@
 /* global $LogProvider: false */
 'use strict';
 
-function initService(debugEnabled) {
+function initService(debugEnabled, debugLevel) {
     return module(function($logProvider){
       $logProvider.debugEnabled(debugEnabled);
+      $logProvider.debugLevel(debugLevel);
     });
   }
 
@@ -178,4 +179,47 @@ describe('$log', function() {
       expect(errorArgs).toEqual(['abc', 'message\nsourceURL:123']);
     });
   });
+
+  describe('$logLevel', function() {
+
+    it('should log all levels if not defined', function(){
+        $window.console = {log: log,
+                           warn: warn,
+                           info: info,
+                           error: error,
+                           debug: debug};
+      },
+
+      function($log) {
+        $log.log();
+        $log.info();
+        $log.warn();
+        $log.error();
+        $log.debug();
+        expect(logger).toEqual('log;info;warn;error;debug;');
+
+    });
+
+    it('should log only errors and warns if warn level is defined', function(){
+        $window.console = {log: log,
+                           warn: warn,
+                           info: info,
+                           error: error,
+                           debug: debug};
+        initService(true, 'warn');
+      },
+
+      function($log) {
+        $log.log();
+        $log.info();
+        $log.warn();
+        $log.error();
+        $log.debug();
+        expect(logger).toEqual('warn;error;debug;');
+
+    });
+
+  });
+
+
 });