From d77f824723ce5d7a4de7a958ac04fe5d44f4ce3e Mon Sep 17 00:00:00 2001
From: Trent Mick <trentm@gmail.com>
Date: Fri, 16 Jan 2015 09:00:10 -0800
Subject: [PATCH] improve rotating-file assert on 'count' field

Fixes #207, #208
---
 lib/bunyan.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/bunyan.js b/lib/bunyan.js
index c3628f1..8ee1361 100644
--- a/lib/bunyan.js
+++ b/lib/bunyan.js
@@ -1051,7 +1051,12 @@ function RotatingFileStream(options) {
     this.stream = fs.createWriteStream(this.path,
         {flags: 'a', encoding: 'utf8'});
     this.count = (options.count == null ? 10 : options.count);
-    assert.ok(typeof (this.count) === 'number' && this.count >= 0);
+    assert.equal(typeof (self.count), 'number',
+        format('rotating-file stream "count" is not a number: %j (%s) in %j',
+            self.count, typeof(self.count), self));
+    assert.ok(self.count >= 0,
+        format('rotating-file stream "count" is not >= 0: %j in %j',
+            self.count, self));
 
     // Parse `options.period`.
     if (options.period) {