From 7bd70dcd6c62fb94e3298e926f69a4e1946739cc Mon Sep 17 00:00:00 2001
From: Norman Clarke <norman@njclarke.com>
Date: Tue, 15 Mar 2011 10:06:53 -0300
Subject: Add messages to plain assertions.

Signed-off-by: Santiago Pastorino <santiago@wyeworks.com>
---
 activemodel/lib/active_model/lint.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/activemodel/lib/active_model/lint.rb b/activemodel/lib/active_model/lint.rb
index 957d1b9d70..35e216ac6b 100644
--- a/activemodel/lib/active_model/lint.rb
+++ b/activemodel/lib/active_model/lint.rb
@@ -23,7 +23,7 @@ module ActiveModel
       def test_to_key
         assert model.respond_to?(:to_key), "The model should respond to to_key"
         def model.persisted?() false end
-        assert model.to_key.nil?
+        assert model.to_key.nil?, "to_key should return nil when `persisted?` returns false"
       end
 
       # == Responds to <tt>to_param</tt>
@@ -40,7 +40,7 @@ module ActiveModel
         assert model.respond_to?(:to_param), "The model should respond to to_param"
         def model.to_key() [1] end
         def model.persisted?() false end
-        assert model.to_param.nil?
+        assert model.to_param.nil?, "to_param should return nil when `persited?` returns false"
       end
 
       # == Responds to <tt>valid?</tt>
-- 
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