From 0a678d412f1350631c69b8429d4bc011ac2eb4e7 Mon Sep 17 00:00:00 2001
From: Jon Higgs <jhiggs@eml.cc>
Date: Thu, 10 Jul 2014 16:20:01 +0200
Subject: [PATCH] snake_case to deal with numbers in string.

---
 lib/extlib/string.rb |  2 +-
 spec/string_spec.rb  | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/extlib/string.rb b/lib/extlib/string.rb
index 11f028c..5b5b67a 100644
--- a/lib/extlib/string.rb
+++ b/lib/extlib/string.rb
@@ -38,7 +38,7 @@ def unescape_regexp
   def snake_case
     return downcase if match(/\A[A-Z]+\z/)
     gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2').
-    gsub(/([a-z])([A-Z])/, '\1_\2').
+    gsub(/([a-z0-9])([A-Z])/, '\1_\2').
     downcase
   end
 
diff --git a/spec/string_spec.rb b/spec/string_spec.rb
index d5ac258..5e444aa 100644
--- a/spec/string_spec.rb
+++ b/spec/string_spec.rb
@@ -57,6 +57,12 @@
   it "leaves CamelCase as is" do
     "TestController".camel_case.should == "TestController"
   end
+
+  it "handle when section ends in a number" do
+    "ec2_instance".camel_case.should == "Ec2Instance"
+    "ec2".camel_case.should == "Ec2"
+    "s3_bucket_name".camel_case.should == "S3BucketName"
+  end
 end
 
 
@@ -79,6 +85,8 @@
     "CNNNews".snake_case.should == "cnn_news"
     "HeadlineCNNNews".snake_case.should == "headline_cnn_news"
     "NameACRONYM".snake_case.should == "name_acronym"
+    "EC2".snake_case.should == "ec2"
+    "EC2Instance".snake_case.should == "ec2_instance"
   end
 
   it "does NOT change one word lowercase" do
@@ -88,6 +96,12 @@
   it "leaves snake_case as is" do
     "merb_core".snake_case.should == "merb_core"
   end
+
+  it "detects a capital after a number" do
+    "Ec2Instance".snake_case.should == "ec2_instance"
+    "Route53".snake_case.should == "route53"
+    "S3BucketName".snake_case.should == "s3_bucket_name"
+  end
 end