console-log-level - npm Package Compare versions

Comparing version 1.0.0 to 1.1.0

index.js

 'use strict';
 
+var util = require('util');
+
 var levels = ['debug', 'info', 'warn', 'error', 'fatal'];
@@ -18,2 +20,5 @@
       if (!shouldLog(level)) return;
+
+      var prefix = opts.prefix;
+
       switch (level) {
@@ -23,2 +28,8 @@ case 'debug': level = 'info'; break;
       }
+
+      if (prefix) {
+        if (typeof prefix === 'function') prefix = prefix();
+        arguments[0] = util.format(prefix, arguments[0]);
+      }
+
       console[level].apply(console, arguments);
@@ -25,0 +36,0 @@ };

package.json

 {
   "name": "console-log-level",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "The most simple logger imaginable",
@@ -31,3 +31,7 @@ "main": "index.js",
     "tape": "^3.0.3"
-  }
+  },
+  "coordinates": [
+    55.687684,
+    12.5955911
+  ]
 }

README.md

@@ -7,4 +7,3 @@ # console-log-level
 
-Log levels supported: debug, info, warn, error and fatal (defaults to
-'info').
+Log levels supported: debug, info, warn, error and fatal.
 
@@ -31,4 +30,24 @@ [![build status](https://secure.travis-ci.org/watson/console-log-level.png)](http://travis-ci.org/watson/console-log-level)
 
+## Options
+
+Configure the logger by passing an options object:
+
+```js
+var log = require('console-log-level')({
+  prefix: function () { return new Date().toISOString(); },
+  level: 'info'
+});
+```
+
+### level
+
+A `string` to specify the log level. Defaults to `info`.
+
+### prefix
+
+Specify this option if you want to set a prefix for all log messages.
+This must be a `string` or a `function` that returns a string.
+
 ## License
 
 MIT

test.js

@@ -25,2 +25,14 @@ 'use strict';
 
+var spyOn = function (method, spy) {
+  console['~' + method] = console[method];
+  console[method] = function () {
+    spy.apply(console, arguments);
+  };
+};
+
+var spyOff = function (method) {
+  console[method] = console['~' + method];
+  delete console['~' + method];
+};
+
 test('log all', function (t) {
@@ -106,1 +118,59 @@ var logger = Logger({ level: 'debug' });
 });
+
+test('set prefix', function (t) {
+  var now = new Date().toISOString();
+  var logger = Logger({ prefix: now });
+  var msg = 'bar';
+
+  spyOn('info', function () {
+    spyOff('info');
+    t.equal(arguments[0], now + ' foo %s', 'first arg ok');
+    t.equal(arguments[1], msg, 'second arg ok');
+  });
+
+  spyOn('warn', function () {
+    spyOff('warn');
+    t.equal(arguments[0], now + ' foo %s', 'first arg ok');
+    t.equal(arguments[1], msg, 'second arg ok');
+  });
+
+  spyOn('error', function () {
+    spyOff('error');
+    t.equal(arguments[0], now + ' foo %s', 'first arg ok');
+    t.equal(arguments[1], msg, 'second arg ok');
+    t.end();
+  });
+
+  logger.info('foo %s', msg);
+  logger.warn('foo %s', msg);
+  logger.error('foo %s', msg);
+});
+
+test('set prefix with function', function (t) {
+  var now = new Date().toISOString();
+  var logger = Logger({ prefix: function () { return now; } });
+  var msg = 'bar';
+
+  spyOn('info', function () {
+    spyOff('info');
+    t.equal(arguments[0], now + ' foo %s', 'first arg ok');
+    t.equal(arguments[1], msg, 'second arg ok');
+  });
+
+  spyOn('warn', function () {
+    spyOff('warn');
+    t.equal(arguments[0], now + ' foo %s', 'first arg ok');
+    t.equal(arguments[1], msg, 'second arg ok');
+  });
+
+  spyOn('error', function () {
+    spyOff('error');
+    t.equal(arguments[0], now + ' foo %s', 'first arg ok');
+    t.equal(arguments[1], msg, 'second arg ok');
+    t.end();
+  });
+
+  logger.info('foo %s', msg);
+  logger.warn('foo %s', msg);
+  logger.error('foo %s', msg);
+});

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Improved metrics

Total package byte prevSize

8907

increased by39.67%

Lines of code

170

increased by60.38%

Number of lines in readme file

52

increased by57.58%

No dependency changes